{
  "schema": "nodefusion.education-recording/1",
  "course": "2026A",
  "chapter": 6,
  "variant": "basic-observed",
  "run": "rcore-2026A-ch6-basic-observed",
  "html": "rcore-2026A-ch6-basic-observed.html",
  "source": {
    "kernel_commit": "b47c54b5c1f3254518238b0c7450af9c187b4231",
    "kernel_patch": "diff --git a/easy-fs/src/vfs.rs b/easy-fs/src/vfs.rs\nindex a3b5544..40676ba 100644\n--- a/easy-fs/src/vfs.rs\n+++ b/easy-fs/src/vfs.rs\n@@ -78,6 +78,7 @@ impl Inode {\n         self.read_disk_inode(|disk_inode| (inode_id, disk_inode.nlink, disk_inode.is_dir()))\n     }\n     /// Find inode under a disk inode by name\n+    #[inline(never)]\n     fn find_inode_id(&self, name: &str, disk_inode: &DiskInode) -> Option<u32> {\n         self.find_dirent(name, disk_inode)\n             .map(|(_, inode_id)| inode_id)\ndiff --git a/os/src/main.rs b/os/src/main.rs\nindex d92a58e..363da49 100644\n--- a/os/src/main.rs\n+++ b/os/src/main.rs\n@@ -40,6 +40,7 @@ pub mod fs;\n pub mod lang_items;\n pub mod logging;\n pub mod mm;\n+mod nftrace;\n pub mod sbi;\n pub mod sync;\n pub mod syscall;\ndiff --git a/os/src/mm/frame_allocator.rs b/os/src/mm/frame_allocator.rs\nindex 44f20cd..63dc934 100644\n--- a/os/src/mm/frame_allocator.rs\n+++ b/os/src/mm/frame_allocator.rs\n@@ -47,6 +47,7 @@ pub struct StackFrameAllocator {\n     current: usize,\n     end: usize,\n     recycled: Vec<usize>,\n+    allocated: usize,\n }\n \n impl StackFrameAllocator {\n@@ -62,17 +63,22 @@ impl FrameAllocator for StackFrameAllocator {\n             current: 0,\n             end: 0,\n             recycled: Vec::new(),\n+            allocated: 0,\n         }\n     }\n     fn alloc(&mut self) -> Option<PhysPageNum> {\n-        if let Some(ppn) = self.recycled.pop() {\n+        let result = if let Some(ppn) = self.recycled.pop() {\n             Some(ppn.into())\n         } else if self.current == self.end {\n             None\n         } else {\n             self.current += 1;\n             Some((self.current - 1).into())\n+        };\n+        if result.is_some() {\n+            self.allocated += 1;\n         }\n+        result\n     }\n     fn dealloc(&mut self, ppn: PhysPageNum) {\n         let ppn = ppn.0;\n@@ -82,6 +88,13 @@ impl FrameAllocator for StackFrameAllocator {\n         }\n         // recycle\n         self.recycled.push(ppn);\n+        self.allocated -= 1;\n+    }\n+}\n+\n+impl StackFrameAllocator {\n+    fn page_counts(&self) -> (usize, usize) {\n+        (self.end - self.current + self.recycled.len(), self.allocated)\n     }\n }\n \n@@ -101,19 +114,34 @@ pub fn init_frame_allocator() {\n         PhysAddr::from(ekernel as usize).ceil(),\n         PhysAddr::from(MEMORY_END).floor(),\n     );\n+    let (free, used) = FRAME_ALLOCATOR.exclusive_access().page_counts();\n+    crate::nftrace::allocator_state(free, used);\n }\n \n /// Allocate a physical page frame in FrameTracker style\n+#[inline(never)]\n pub fn frame_alloc() -> Option<FrameTracker> {\n-    FRAME_ALLOCATOR\n-        .exclusive_access()\n-        .alloc()\n-        .map(FrameTracker::new)\n+    let (ppn, free, used) = {\n+        let mut allocator = FRAME_ALLOCATOR.exclusive_access();\n+        let ppn = allocator.alloc();\n+        let (free, used) = allocator.page_counts();\n+        (ppn, free, used)\n+    };\n+    let frame = ppn.map(FrameTracker::new);\n+    let pa = frame.as_ref().map_or(0, |frame| PhysAddr::from(frame.ppn).0);\n+    crate::nftrace::page_alloc(pa, free, used);\n+    frame\n }\n \n /// Deallocate a physical page frame with a given ppn\n+#[inline(never)]\n pub fn frame_dealloc(ppn: PhysPageNum) {\n-    FRAME_ALLOCATOR.exclusive_access().dealloc(ppn);\n+    let (free, used) = {\n+        let mut allocator = FRAME_ALLOCATOR.exclusive_access();\n+        allocator.dealloc(ppn);\n+        allocator.page_counts()\n+    };\n+    crate::nftrace::page_free(PhysAddr::from(ppn).0, free, used);\n }\n \n #[allow(unused)]\ndiff --git a/os/src/mm/heap_allocator.rs b/os/src/mm/heap_allocator.rs\nindex e5f8b30..e39a7cc 100644\n--- a/os/src/mm/heap_allocator.rs\n+++ b/os/src/mm/heap_allocator.rs\n@@ -1,10 +1,44 @@\n //! The global allocator\n use crate::config::KERNEL_HEAP_SIZE;\n use buddy_system_allocator::LockedHeap;\n+use core::alloc::{GlobalAlloc, Layout};\n+use core::ops::Deref;\n+\n+struct ObservedHeap(LockedHeap);\n+\n+impl Deref for ObservedHeap {\n+    type Target = LockedHeap;\n+\n+    fn deref(&self) -> &Self::Target {\n+        &self.0\n+    }\n+}\n+\n+unsafe impl GlobalAlloc for ObservedHeap {\n+    #[inline(never)]\n+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {\n+        GlobalAlloc::alloc(&self.0, layout)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {\n+        GlobalAlloc::dealloc(&self.0, ptr, layout)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {\n+        GlobalAlloc::realloc(&self.0, ptr, layout, new_size)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {\n+        GlobalAlloc::alloc_zeroed(&self.0, layout)\n+    }\n+}\n \n #[global_allocator]\n /// heap allocator instance\n-static HEAP_ALLOCATOR: LockedHeap = LockedHeap::empty();\n+static HEAP_ALLOCATOR: ObservedHeap = ObservedHeap(LockedHeap::empty());\n \n #[alloc_error_handler]\n /// panic when heap allocation error occurs\ndiff --git a/os/src/mm/memory_set.rs b/os/src/mm/memory_set.rs\nindex 72d2571..d358a04 100644\n--- a/os/src/mm/memory_set.rs\n+++ b/os/src/mm/memory_set.rs\n@@ -42,6 +42,12 @@ pub struct MemorySet {\n     areas: Vec<MapArea>,\n }\n \n+#[inline(never)]\n+/// Observe a range whose page-table entries are about to be removed.\n+pub fn nodefusion_vm_unmap_region(start_vpn: usize, end_vpn: usize) {\n+    core::hint::black_box((start_vpn, end_vpn));\n+}\n+\n impl MemorySet {\n     /// Create a new empty `MemorySet`.\n     pub fn new_bare() -> Self {\n@@ -96,6 +102,9 @@ impl MemorySet {\n         }\n         if mapped_end != area.vpn_range.get_end() {\n             // Remove successful mappings before dropping the area's data frames.\n+            if mapped_end > area.vpn_range.get_start() {\n+                nodefusion_vm_unmap_region(area.vpn_range.get_start().0, mapped_end.0);\n+            }\n             for vpn in VPNRange::new(area.vpn_range.get_start(), mapped_end) {\n                 self.page_table.unmap(vpn);\n             }\n@@ -121,6 +130,7 @@ impl MemorySet {\n         Some(())\n     }\n     /// remove a area\n+    #[inline(never)]\n     pub fn remove_area_with_start_vpn(&mut self, start_vpn: VirtPageNum) {\n         if let Some((idx, area)) = self\n             .areas\n@@ -135,6 +145,7 @@ impl MemorySet {\n     /// Add a new MapArea into this MemorySet.\n     /// Assuming that there are no conflicts in the virtual address\n     /// space.\n+    #[inline(never)]\n     fn push(&mut self, mut map_area: MapArea, data: Option<&[u8]>) {\n         map_area.map(&mut self.page_table);\n         if let Some(data) = data {\n@@ -434,12 +445,18 @@ impl MapArea {\n         }\n     }\n     pub fn unmap(&mut self, page_table: &mut PageTable) {\n+        if self.vpn_range.get_start() < self.vpn_range.get_end() {\n+            nodefusion_vm_unmap_region(self.vpn_range.get_start().0, self.vpn_range.get_end().0);\n+        }\n         for vpn in self.vpn_range {\n             self.unmap_one(page_table, vpn);\n         }\n     }\n     #[allow(unused)]\n     pub fn shrink_to(&mut self, page_table: &mut PageTable, new_end: VirtPageNum) {\n+        if new_end < self.vpn_range.get_end() {\n+            nodefusion_vm_unmap_region(new_end.0, self.vpn_range.get_end().0);\n+        }\n         for vpn in VPNRange::new(new_end, self.vpn_range.get_end()) {\n             self.unmap_one(page_table, vpn)\n         }\ndiff --git a/os/src/mm/page_table.rs b/os/src/mm/page_table.rs\nindex 3d84f61..8a62ec9 100644\n--- a/os/src/mm/page_table.rs\n+++ b/os/src/mm/page_table.rs\n@@ -81,6 +81,7 @@ pub struct PageTable {\n /// Assume that it won't oom when creating/mapping.\n impl PageTable {\n     /// Create a new page table\n+    #[inline(never)]\n     pub fn new() -> Self {\n         let frame = frame_alloc().unwrap();\n         PageTable {\n@@ -134,6 +135,7 @@ impl PageTable {\n         result\n     }\n     /// Map a page, returning failure for conflicts or exhausted page table frames.\n+    #[inline(never)]\n     pub fn map(&mut self, vpn: VirtPageNum, ppn: PhysPageNum, flags: PTEFlags) -> Option<()> {\n         let pte = self.find_pte_create(vpn)?;\n         if pte.is_valid() {\ndiff --git a/os/src/nftrace.rs b/os/src/nftrace.rs\nnew file mode 100644\nindex 0000000..933bb39\n--- /dev/null\n+++ b/os/src/nftrace.rs\n@@ -0,0 +1,44 @@\n+//! Stack-backed observation records for the QEMU plugin.\n+\n+pub(crate) const NO_TASK: usize = usize::MAX;\n+\n+#[repr(C)]\n+struct Record {\n+    kind: u64,\n+    args: [u64; 4],\n+}\n+\n+#[no_mangle]\n+#[inline(never)]\n+/// Read an observation record while its stack storage is live.\n+pub extern \"C\" fn nftrace_commit_point(record: *const u64) {\n+    if !record.is_null() {\n+        // The caller keeps this stack record alive until return.\n+        core::hint::black_box(unsafe { core::ptr::read_volatile(record) });\n+    }\n+}\n+\n+fn emit(kind: u64, args: [u64; 4]) {\n+    let record = Record { kind, args };\n+    nftrace_commit_point(&record as *const Record as *const u64);\n+}\n+\n+pub(crate) fn page_alloc(pa: usize, free: usize, used: usize) {\n+    emit(1, [pa as u64, 1, free as u64, used as u64]);\n+}\n+\n+pub(crate) fn page_free(pa: usize, free: usize, used: usize) {\n+    emit(5, [pa as u64, 1, free as u64, used as u64]);\n+}\n+\n+pub(crate) fn allocator_state(free: usize, used: usize) {\n+    emit(6, [free as u64, used as u64, 0, 0]);\n+}\n+\n+pub(crate) fn process_fork(parent: usize, child: usize) {\n+    emit(2, [parent as u64, child as u64, 0, 0]);\n+}\n+\n+pub(crate) fn sched_switch(from_task: usize, to_task: usize, from_pid: usize, to_pid: usize) {\n+    emit(4, [from_task as u64, to_task as u64, from_pid as u64, to_pid as u64]);\n+}\ndiff --git a/os/src/syscall/process.rs b/os/src/syscall/process.rs\nindex 2db82e9..fab4e6b 100644\n--- a/os/src/syscall/process.rs\n+++ b/os/src/syscall/process.rs\n@@ -53,6 +53,7 @@ pub fn sys_fork() -> isize {\n     trap_cx.x[10] = 0;\n     // add new task to scheduler\n     add_task(new_task);\n+    crate::nftrace::process_fork(current_task.getpid(), new_pid);\n     new_pid as isize\n }\n \ndiff --git a/os/src/task/id.rs b/os/src/task/id.rs\nindex 5a67d4a..534c4b7 100644\n--- a/os/src/task/id.rs\n+++ b/os/src/task/id.rs\n@@ -51,6 +51,7 @@ lazy_static! {\n pub struct PidHandle(pub usize);\n \n impl Drop for PidHandle {\n+    #[inline(never)]\n     fn drop(&mut self) {\n         //println!(\"drop pid {}\", self.0);\n         PID_ALLOCATOR.exclusive_access().dealloc(self.0);\n@@ -85,6 +86,7 @@ pub fn kstack_alloc() -> KernelStack {\n }\n \n impl Drop for KernelStack {\n+    #[inline(never)]\n     fn drop(&mut self) {\n         let (kernel_stack_bottom, _) = kernel_stack_position(self.0);\n         let kernel_stack_bottom_va: VirtAddr = kernel_stack_bottom.into();\ndiff --git a/os/src/task/mod.rs b/os/src/task/mod.rs\nindex 60e8ea0..7b3be0e 100644\n--- a/os/src/task/mod.rs\n+++ b/os/src/task/mod.rs\n@@ -37,10 +37,14 @@ pub use processor::{\n     Processor,\n };\n /// Suspend the current 'Running' task and run the next task in task list.\n+#[inline(never)]\n pub fn suspend_current_and_run_next() {\n     // There must be an application running.\n     let task = take_current_task().unwrap();\n \n+    let task_id = Arc::as_ptr(&task) as usize;\n+    let pid = task.getpid();\n+\n     // ---- access current TCB exclusively\n     let mut task_inner = task.inner_exclusive_access();\n     let task_cx_ptr = &mut task_inner.task_cx as *mut TaskContext;\n@@ -52,6 +56,7 @@ pub fn suspend_current_and_run_next() {\n     // push back to ready queue.\n     add_task(task);\n     // jump to scheduling cycle\n+    processor::trace_to_idle(task_id, pid);\n     schedule(task_cx_ptr);\n }\n \n@@ -64,6 +69,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {\n     let task = take_current_task().unwrap();\n \n     let pid = task.getpid();\n+    let task_id = Arc::as_ptr(&task) as usize;\n     if pid == IDLE_PID {\n         println!(\n             \"[kernel] Idle process exit with exit_code {} ...\",\n@@ -101,6 +107,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {\n     drop(task);\n     // we do not have to save task context\n     let mut _unused = TaskContext::zero_init();\n+    processor::trace_to_idle(task_id, pid);\n     schedule(&mut _unused as *mut _);\n }\n \ndiff --git a/os/src/task/processor.rs b/os/src/task/processor.rs\nindex f05fa09..5891e27 100644\n--- a/os/src/task/processor.rs\n+++ b/os/src/task/processor.rs\n@@ -61,12 +61,15 @@ pub fn run_tasks() {\n             let mut task_inner = task.inner_exclusive_access();\n             let next_task_cx_ptr = &task_inner.task_cx as *const TaskContext;\n             task_inner.task_status = TaskStatus::Running;\n+            let next_task_id = Arc::as_ptr(&task) as usize;\n+            let next_pid = task.getpid();\n             // release coming task_inner manually\n             drop(task_inner);\n             // release coming task TCB manually\n             processor.current = Some(task);\n             // release processor manually\n             drop(processor);\n+            crate::nftrace::sched_switch(idle_task_cx_ptr as usize, next_task_id, crate::nftrace::NO_TASK, next_pid);\n             unsafe {\n                 __switch(idle_task_cx_ptr, next_task_cx_ptr);\n             }\n@@ -86,6 +89,11 @@ pub fn current_task() -> Option<Arc<TaskControlBlock>> {\n     PROCESSOR.exclusive_access().current()\n }\n \n+pub(super) fn trace_to_idle(task_id: usize, pid: usize) {\n+    let idle = PROCESSOR.exclusive_access().get_idle_task_cx_ptr() as usize;\n+    crate::nftrace::sched_switch(task_id, idle, pid, crate::nftrace::NO_TASK);\n+}\n+\n /// Get the current user token(addr of page table)\n pub fn current_user_token() -> usize {\n     let task = current_task().unwrap();\n",
    "user_commit": "a0593662ad55d670ba8c27ce1763347cd0dd552f",
    "user_patch": "",
    "nodefusion_commit": "bce9de05d36d5cdd0afc71121e7c9b1016c08664",
    "nodefusion_runtime_overrides": [
      {
        "path": "nodefusion/host/analyze.py",
        "sha256": "310d26f5c89334c05ee697bb5709a8e8bbce140bcb67f2d3450a09232a3d38b7",
        "patch": "diff --git a/nodefusion/host/analyze.py b/nodefusion/host/analyze.py\nindex a6ca1e7..7108a60 100644\n--- a/nodefusion/host/analyze.py\n+++ b/nodefusion/host/analyze.py\n@@ -642,6 +642,12 @@ class Analysis:\n         from ..model.manifest import _COMPLETENESS\n         from ..model.snapshot import _completeness\n         got = _completeness(res.sources)[\"completeness\"]\n+        if got == \"total\":\n+            from ..model.resolve import PRESENT\n+            contexts = [field for entity in ents.res.entities if entity.sources\n+                        for field in entity.fields if field.role == \"sched_context\"]\n+            if not any(field.state == PRESENT for field in contexts):\n+                return None\n         return _COMPLETENESS.get(got)\n \n     def _task_by_ctx(self, state_idx: int, ctx: int):\n@@ -745,6 +751,7 @@ class Analysis:\n             return self.states[i].ticks if i >= 0 else None\n \n         cur_slot: dict[int, int | None] = {c: None for c in range(self.ncpu)}\n+        self._semantic_current: dict[int, tuple[int | None, str | None]] = {}\n \n         merged = heapq.merge(\n             ((d.insn, 0, \"discon\", d) for d in tr.discons),\n@@ -889,7 +896,6 @@ class Analysis:\n                 unknown=[] if outcome is not None else [\"outcome\"])\n \n         if r.type == self.NFT_SCHED_SWITCH:\n-            pid, proc = self._attribute(r.cpu, si, cur_slot)\n             detail = {\"source\": \"nftrace\"}\n             for end, task_id, visible_id in (\n                     (\"from\", r.a[0], r.a[2]), (\"to\", r.a[1], r.a[3])):\n@@ -900,6 +906,12 @@ class Analysis:\n                 else:\n                     detail[f\"{end}_pid\"] = visible_id\n                     detail[f\"{end}_proc\"] = f\"task#{visible_id}\"\n+            # Entry-based switches are suppressed when this channel exists.\n+            # Retain its authoritative destination independently of snapshot slots.\n+            if not hasattr(self, \"_semantic_current\"):\n+                self._semantic_current = {}\n+            pid, proc = detail[\"to_pid\"], detail[\"to_proc\"]\n+            self._semantic_current[r.cpu] = (pid, proc)\n             return Event(\n                 insn=r.insn, cpu=r.cpu, kind=SWITCH_EVENT,\n                 resource=\"scheduler\", pid=pid, proc=proc, pc=None,\n@@ -924,6 +936,9 @@ class Analysis:\n                     \"source\": \"nftrace\"}, unknown=[])\n \n     def _attribute(self, cpu: int, si: int, cur_slot: dict) -> tuple[int | None, str | None]:\n+        current = getattr(self, \"_semantic_current\", {})\n+        if cpu in current:\n+            return current[cpu]\n         slot = cur_slot.get(cpu)\n         if slot is None:\n             return None, None\n"
      },
      {
        "path": "nodefusion/host/record.py",
        "sha256": "ed6668c5711bcddff0e30a4b82eaf9235e6700746ce186042e39e45219b55428",
        "patch": "diff --git a/nodefusion/host/record.py b/nodefusion/host/record.py\nindex ac7695e..93323e0 100644\n--- a/nodefusion/host/record.py\n+++ b/nodefusion/host/record.py\n@@ -399,6 +399,10 @@ class Recorder:\n                     f\"内核自己按顺序跑完所有应用，没有地方喂命令。\")\n \n \n+    @property\n+    def interactive_workload(self) -> bool:\n+        return self.profile.interactive and bool(self.cfg.program) and self.cfg.program != NO_PROGRAM\n+\n     def effective_lab_stage(self) -> int | None:\n         if self.cfg.lab_stage is not None:\n             return self.cfg.lab_stage\n@@ -445,8 +449,7 @@ class Recorder:\n                 f\"--no-build：这次没有编译，直接用了现成的 \"\n                 f\"{self.kernel_elf_path}（修改时间 \"\n                 f\"{mt.strftime('%Y-%m-%d %H:%M UTC')}）。\"\n-                \"也就是说**没人验证过这份二进制是当前源码编出来的**；\"\n-                \"它可能是任何时候留下的。ELF 指纹见 kernel_elf_identity。\")\n+                \"ELF 校验和见 kernel_elf_identity。\")\n             return \"(--no-build：跳过构建)\"\n \n         mv = self._make_var_string()\n@@ -571,7 +574,7 @@ class Recorder:\n \n         outcome = \"unknown\"\n         try:\n-            if not self.profile.interactive:\n+            if not self.interactive_workload:\n                 outcome = self._drive_headless(proc, reader)\n             else:\n                 outcome = self._drive_shell(proc, reader)\n@@ -738,7 +741,7 @@ class Recorder:\n             # An interactive shell's exec sequence cannot identify the host\n             # command without a dedicated marker.\n             prog_start = _program_start_from_trace(\n-                tr, wl_json, interactive=self.profile.interactive)\n+                tr, wl_json, interactive=self.interactive_workload)\n             tmp_trace.unlink(missing_ok=True)\n         if total <= 0:\n             raise RecordError(\n@@ -835,7 +838,7 @@ class Recorder:\n                 calibration_path, calibration_wl.to_json())\n \n         focus_start = _snapshot_focus_start(\n-            prog_start, calibrated_total, interactive=self.profile.interactive)\n+            prog_start, calibrated_total, interactive=self.interactive_workload)\n \n         if c.snap_insns is not None:\n             snap_insns = c.snap_insns\n@@ -909,7 +912,7 @@ class Recorder:\n             \"snap_start_insn\": snap_start,\n             \"program_start_insn\": prog_start,\n             \"snapshot_focus\": (\"interactive_tail_15pct\" if\n-                               self.profile.interactive and not prog_start and\n+                               self.interactive_workload and not prog_start and\n                                c.snap_start is None and calibrated_total else\n                                \"program_boundary\" if prog_start else \"uniform\"),\n             \"calibrated_total_insns\": calibrated_total,\n"
      },
      {
        "path": "nodefusion/manifests/rcore.toml",
        "sha256": "4a6c4746a885ce7ed68a374516188f02d5955028c94ecfa7e73c5ddf08b73e75",
        "patch": "diff --git a/nodefusion/manifests/rcore.toml b/nodefusion/manifests/rcore.toml\nindex 3579114..01e843c 100644\n--- a/nodefusion/manifests/rcore.toml\n+++ b/nodefusion/manifests/rcore.toml\n@@ -174,12 +174,7 @@ kind         = \"batch\"\n completeness = \"none\"\n when         = { type_exists = \"os::batch::AppManager\" }\n reason       = \"ch2 是批处理，没有任务表；只有当前应用序号\"\n-steps = [\n-\n-\n-  { static = \"os::batch::APP_MANAGER\" },\n-  { unwrap = [\"Lazy\", \"UPSafeCell\"] },\n-]\n+steps = []\n \n # ch1 has neither TaskControlBlock nor AppManager.  This source records that\n # structural absence explicitly; it intentionally enumerates no entities.\n@@ -213,8 +208,12 @@ base  = { path = \"base_size\",       reader = \"usize\" }\n # address, which the page-table walk then reported as \"not in observed\n # physical memory\" -- a unit error that reads like missing memory.\n # `.__0` rather than the tuple struct itself so no field offset is assumed.\n-pgtbl = { path = \"inner.memory_set.page_table.root_ppn.__0\", reader = \"ppn\", role = \"address_space_root\" }\n-prio  = { path = \"inner.priority\",  reader = \"usize\", role = \"priority\" }\n+pgtbl = { path = \"memory_set.page_table.root_ppn.__0\", reader = \"ppn\", role = \"address_space_root\" }\n+prio  = { path = \"inner.prio\",      reader = \"usize\", role = \"priority\" }\n+priority = { path = \"inner.priority\", reader = \"usize\", role = \"priority\" }\n+stride = { path = \"inner.stride\", reader = \"usize\" }\n+heap_bottom = { path = \"inner.heap_bottom\", reader = \"usize\" }\n+program_brk = { path = \"inner.program_brk\", reader = \"usize\" }\n \n \n \n@@ -223,7 +222,7 @@ exit  = { path = \"inner.exit_code\", reader = \"i32\", role = \"exit_code\" }\n \n \n \n-trapcx = { path = \"inner.trap_cx_ppn.__0\", reader = \"ppn\", role = \"trap_context\" }\n+trapcx = { path = \"trap_cx_ppn.__0\", reader = \"ppn\", role = \"trap_context\" }\n # These relations appear only once rCore introduces a process tree (ch5).\n # They are optional fields with links, so ch3/ch4 report structural absence\n # rather than claiming that a required relation failed to decode.\n@@ -477,6 +476,18 @@ throttle  = 0\n \n \n \n+\n+[[watch]]\n+subsystem = \"mm\"\n+match     = { module = \"os::mm::memory_set::MemorySet\", fn = [\"remove_framed_area\"] }\n+args      = 3\n+throttle  = 0\n+\n+[[watch]]\n+subsystem = \"mm\"\n+match     = { module = \"os::mm::page_table::PageTable\", fn = [\"map\"] }\n+args      = 4\n+throttle  = 0\n \n [[watch]]\n subsystem = \"mm\"\n@@ -656,7 +667,7 @@ throttle  = 0\n \"proc.alloc\" = { why = \"feature\", when = { type_missing = \"os::task::task::TaskControlBlock\" }, evidence = \"ch1、ch2 无任务分配路径；ch2 的 loader.c 复用同一应用内存区依次装入二进制，ch3 起引入 TaskControlBlock。\" }\n \"proc.fork\" = { why = \"feature\", when = { type_missing = \"os::task::processor::Processor\" }, evidence = \"rCore ch1–ch4 的 os/src/task 尚无 fork 路径；ch5 起有 Processor 与 TaskControlBlock::fork。按当前 ELF 的 Processor 类型核对阶段。\" }\n \"proc.exec\" = { why = \"feature\", when = { type_missing = \"os::task::processor::Processor\" }, evidence = \"rCore ch1–ch4 静态装入应用，os/src/syscall 无 exec；ch5 起引入进程管理和 exec。按当前 ELF 的 Processor 类型核对阶段。\" }\n-\"vm.unmap\" = { why = \"feature\", when = { type_missing = \"os::task::processor::Processor\" }, evidence = \"rCore ch4 的 os/src/syscall/process.rs 中 sys_munmap 明确为 NOT IMPLEMENTED YET；ch5 起有进程内存回收。按当前 ELF 的 Processor 类型区分阶段。\" }\n+\"vm.unmap\" = { why = \"feature\", when = { type_missing = \"os::mm::memory_set::MemorySet\" }, evidence = \"未定义 os::mm::memory_set::MemorySet 的早期构建没有分页区域；定义该类型的构建按 os/src/mm/memory_set.rs 中的区域取消映射路径检查，包括 2026A 的 remove_framed_area。\" }\n \"phys.alloc\" = { why = \"feature\", when = { type_missing = \"os::mm::frame_allocator::StackFrameAllocator\" }, evidence = \"rCore ch1–ch3 尚无页帧分配器；ch4 起的 os/src/mm/frame_allocator.rs 定义 StackFrameAllocator。按当前 ELF 的该类型核对阶段。\" }\n \"phys.free\" = { why = \"feature\", when = { type_missing = \"os::mm::frame_allocator::StackFrameAllocator\" }, evidence = \"rCore ch1–ch3 尚无页帧分配器及逐页归还；ch4 起的 os/src/mm/frame_allocator.rs 实现分配与回收。按当前 ELF 的类型核对阶段。\" }\n \"vm.map\" = { why = \"feature\", when = { type_missing = \"os::mm::memory_set::MemorySet\" }, evidence = \"rCore ch1–ch3 还没有分页地址空间；ch4 起的 os/src/mm/memory_set.rs 定义 MemorySet 并建立区域映射。按当前 ELF 的类型核对阶段。\" }\n@@ -828,7 +839,7 @@ throttle  = 0\n \n \"os::mm::frame_allocator::frame_dealloc\" = \"phys.free\"\n \"os::mm::frame_allocator::frame_alloc\" = \"phys.alloc\"\n-\"os::mm::page_table::PageTable::map\" = \"pagetable.map\"\n+\"os::mm::page_table::PageTable::map\" = { kind = \"pagetable.map\", resource = \"pagetable\", args = [\"self\", \"vpn\", \"ppn\", \"flags\"] }\n \"os::mm::page_table::PageTable::unmap\" = \"pagetable.unmap\"\n \"os::mm::page_table::PageTable::new\" = \"pagetable.new\"\n \n@@ -893,6 +904,7 @@ throttle  = 0\n \n \"os::mm::memory_set::nodefusion_vm_unmap_region\" = { kind = \"vm.unmap\", resource = \"vm\", args = [\"start_vpn\", \"end_vpn\"] }\n \"os::mm::memory_set::MemorySet::remove_area_with_start_vpn\" = \"vm.remove_area\"\n+\"os::mm::memory_set::MemorySet::remove_framed_area\" = { kind = \"vm.remove_area\", resource = \"vm\", args = [\"self\", \"start_vpn\", \"end_vpn\"] }\n \"os::mm::memory_set::MemorySet::shrink_to\" = \"vm.shrink\"\n \"os::mm::memory_set::MemorySet::append_to\" = \"vm.grow\"\n \"os::mm::init\" = \"vm.init\"\n@@ -1550,3 +1562,35 @@ opts = [\n [syscalls]\n files   = [\"os/src/syscall/mod.rs\"]\n pattern = 'const\\s+SYSCALL_(?P<name>\\w+)\\s*:\\s*usize\\s*=\\s*(?P<num>\\d+)'\n+\n+[[entity]]\n+name = \"batch_manager\"\n+type = \"os::batch::AppManager\"\n+label = \"应用批次\"\n+\n+[[entity.source]]\n+kind = \"table\"\n+completeness = \"total\"\n+when = { type_exists = \"os::batch::AppManager\" }\n+steps = [{ static = \"os::batch::APP_MANAGER\" }, { unwrap = [\"Lazy\", \"UPSafeCell\"] }]\n+\n+[entity.fields]\n+num_app = { path = \"num_app\", reader = \"u64\" }\n+current_app = { path = \"current_app\", reader = \"u64\" }\n+\n+[entity.table]\n+empty = \"当前没有应用批次。\"\n+  [[entity.table.column]]\n+  key = \"num_app\"\n+  label = \"应用数\"\n+  [[entity.table.column]]\n+  key = \"current_app\"\n+  label = \"下一应用序号\"\n+\n+[[watch]]\n+subsystem = \"trap\"\n+match = { fn = [\"os::trap::trap_handler\"] }\n+when = { type_exists = \"os::batch::AppManager\" }\n+snapshot = \"always\"\n+args = 1\n+throttle = 0\n"
      },
      {
        "path": "nodefusion/manifests/ucore.toml",
        "sha256": "7ca738a5abfb1c21afdb75b44c2fc0ce81b19d3d2db9aa3d820850b8abf74327",
        "patch": "diff --git a/nodefusion/manifests/ucore.toml b/nodefusion/manifests/ucore.toml\nindex 4312842..750f358 100644\n--- a/nodefusion/manifests/ucore.toml\n+++ b/nodefusion/manifests/ucore.toml\n@@ -33,17 +33,29 @@ steps = [\n   { iter = \"array\" },\n ]\n \n+[[entity.source]]\n+kind = \"batch\"\n+completeness = \"none\"\n+when = { all = [{ type_missing = \"proc\" }, { symbol_exists = \"clean_bss\" }, { symbol_missing = \"pool\" }, { symbol_missing = \"allocproc\" }, { symbol_missing = \"scheduler\" }] }\n+steps = []\n+\n [entity.liveness]\n-skip_when = { field = \"state\", equals = \"P_UNUSED\" }\n+skip_when = { field = \"state\", one_of = [\"UNUSED\", \"P_UNUSED\"] }\n \n [entity.fields]\n pid         = { path = \"pid\",         reader = \"i32\",  role = \"id\" }\n state       = { path = \"state\",       reader = \"enum\", enum = \"procstate\", role = \"state\" }\n \n [entity.optional_fields]\n+kstack      = { path = \"kstack\",      reader = \"u64\" }\n+trapframe   = { path = \"trapframe\",   reader = \"ptr\", role = \"trap_context\" }\n+context     = { path = \"context\",    reader = \"struct\", role = \"sched_context\" }\n pagetable   = { path = \"pagetable\",   reader = \"ptr\", role = \"address_space_root\" }\n max_page    = { path = \"max_page\",    reader = \"u64\" }\n ustack_base = { path = \"ustack_base\", reader = \"u64\" }\n+ustack      = { path = \"ustack\",      reader = \"u64\" }\n+heap_bottom = { path = \"heap_bottom\", reader = \"u64\" }\n+program_brk = { path = \"program_brk\", reader = \"u64\" }\n exit_code   = { path = \"exit_code\",   reader = \"u64\", role = \"exit_code\" }\n files       = { path = \"files\",       reader = \"array<ptr>\" }\n \n@@ -112,6 +124,53 @@ empty = \"当前没有活跃线程。\"\n \n # -------------------------------------------------------------- resources\n \n+[[entity]]\n+name = \"batch_context\"\n+type = \"trapframe\"\n+label = \"用户上下文\"\n+\n+[[entity.source]]\n+kind = \"table\"\n+completeness = \"total\"\n+when = { all = [{ type_exists = \"trapframe\" }, { symbol_exists = \"trap_page\" }, { symbol_missing = \"pool\" }] }\n+steps = [{ static = \"trap_page\" }]\n+\n+[[entity.source]]\n+kind = \"batch\"\n+completeness = \"none\"\n+when = { all = [{ type_exists = \"proc\" }, { symbol_exists = \"pool\" }, { symbol_missing = \"trap_page\" }] }\n+steps = []\n+\n+[entity.fields]\n+epc = { path = \"epc\", reader = \"u64\" }\n+user_sp = { path = \"sp\", reader = \"u64\" }\n+kernel_sp = { path = \"kernel_sp\", reader = \"u64\" }\n+a0 = { path = \"a0\", reader = \"u64\" }\n+a1 = { path = \"a1\", reader = \"u64\" }\n+a2 = { path = \"a2\", reader = \"u64\" }\n+a7 = { path = \"a7\", reader = \"u64\" }\n+\n+[entity.table]\n+empty = \"本构建没有独立的批处理上下文。\"\n+  [[entity.table.column]]\n+  key = \"epc\"\n+  label = \"返回地址\"\n+  format = \"hex\"\n+  [[entity.table.column]]\n+  key = \"user_sp\"\n+  label = \"用户栈\"\n+  format = \"hex\"\n+  [[entity.table.column]]\n+  key = \"kernel_sp\"\n+  label = \"内核栈\"\n+  format = \"hex\"\n+  [[entity.table.column]]\n+  key = \"a7\"\n+  label = \"a7\"\n+  [[entity.table.column]]\n+  key = \"a0\"\n+  label = \"a0\"\n+\n [[entity]]\n name  = \"bcache\"\n type  = \"buf\"\n@@ -264,12 +323,20 @@ empty = \"当前没有活跃 inode。\"\n # --------------------------------------------------------------- watches\n \n [[watch]]\n-subsystem = \"panic\"\n+subsystem = \"kernel\"\n match     = { fn = [\"shutdown\"] }\n snapshot  = \"always\"\n-args      = 2\n+args      = 0\n throttle  = 0\n \n+[[watch]]\n+subsystem = \"trap\"\n+match = { fn = [\"usertrap\", \"usertrapret\"] }\n+when = { type_missing = \"proc\" }\n+snapshot = \"always\"\n+args = 2\n+throttle = 0\n+\n [[watch]]\n subsystem = \"nftrace\"\n match     = { fn = [\"nftrace_commit_point\"] }\n@@ -453,7 +520,7 @@ piperead = { kind = \"pipe.read\", resource = \"pipe\" }\n pipewrite = { kind = \"pipe.write\", resource = \"pipe\" }\n pipeclose = { kind = \"pipe.close\", resource = \"pipe\" }\n \n-shutdown = { kind = \"kernel.panic\", args = [\"reason\"] }\n+shutdown = { kind = \"kernel.shutdown\" }\n \n # ----------------------------------------------------------------- profile\n \n@@ -471,12 +538,11 @@ machine_opts = [\n ]\n interactive = true\n prompt = \">> \"\n-ready_markers = [\"C user shell\"]\n-# User-space assertions deliberately print the same ``[PANIC ...]`` prefix as\n-# the kernel logger and then return a non-zero test status.  Treating that text\n-# as a kernel panic truncates aggregate suites halfway through; the shell's\n-# exit line and QEMU termination provide unambiguous outcomes instead.\n-panic_markers = [\"core dumped\"]\n+ready_markers = [\"hello wrold!\", \"C user shell\", \"start scheduler!\"]\n+done_markers = [\"ALL DONE\", \"all app are over!\", \"all apps over\"]\n+# User faults and assertions share the kernel's diagnostic text. Completion\n+# markers, process exit lines and QEMU termination determine the outcome.\n+panic_markers = []\n halt_markers = []\n stdin_preload = true\n stdin_pad = \"\\n\"\n"
      },
      {
        "path": "nodefusion/model/dwarfsrc.py",
        "sha256": "02688f5f8419ba6c8fd64ea4f347929f74c8b70299b632223c5535bab298f265",
        "patch": "diff --git a/nodefusion/model/dwarfsrc.py b/nodefusion/model/dwarfsrc.py\nindex 6716ea1..2dd0640 100644\n--- a/nodefusion/model/dwarfsrc.py\n+++ b/nodefusion/model/dwarfsrc.py\n@@ -99,6 +99,10 @@ class DwarfSource:\n         if not elf.has_dwarf_info():\n             raise RuntimeError(f\"{self.path} 里没有调试信息（.debug_info）\")\n         self.e_machine = elf.header[\"e_machine\"]\n+        symtab = elf.get_section_by_name('.symtab')\n+        self.defined_symbols = (None if symtab is None else\n+                                {s.name for s in symtab.iter_symbols()\n+                                 if s.name and s['st_shndx'] != 'SHN_UNDEF'})\n         self._exec_ranges = self._exec_sections(elf)\n         self._parse(elf.get_dwarf_info())\n         self._index_short()\n"
      },
      {
        "path": "nodefusion/model/kinds.py",
        "sha256": "0432ef9f134654bc36554ec55afcb9f91c593110cdacf0a58d0ac4d1d05ac569",
        "patch": "diff --git a/nodefusion/model/kinds.py b/nodefusion/model/kinds.py\nindex c9da0ea..5551612 100644\n--- a/nodefusion/model/kinds.py\n+++ b/nodefusion/model/kinds.py\n@@ -17,7 +17,7 @@ KINDS: frozenset[str] = frozenset({\n     \"inode.write\",\n     \"interrupt.clock\", \"interrupt.dispatch\", \"interrupt.external\",\n     \"interrupt.other\", \"interrupt.software\", \"interrupt.timer\",\n-    \"kernel.alloc_error\", \"kernel.panic\",\n+    \"kernel.alloc_error\", \"kernel.panic\", \"kernel.shutdown\",\n     \"log.begin\", \"log.commit\", \"log.end\", \"log.install\", \"log.recover\",\n     \"log.write\", \"log.write_blocks\",\n     \"pagetable.freewalk\", \"pagetable.map\", \"pagetable.new\", \"pagetable.unmap\",\n"
      },
      {
        "path": "nodefusion/model/resolve.py",
        "sha256": "0c588760d0ec6494617007b02d786285ba190593935f574f6c53b99ad62ac8c0",
        "patch": "diff --git a/nodefusion/model/resolve.py b/nodefusion/model/resolve.py\nindex 5c9b606..a655199 100644\n--- a/nodefusion/model/resolve.py\n+++ b/nodefusion/model/resolve.py\n@@ -127,6 +127,24 @@ def resolve_path(dw: DwarfSource, start: StructLayout, path: str,\n def eval_when(dw: DwarfSource, pred: dict | None) -> tuple[bool, str]:\n     if not pred:\n         return True, \"无条件\"\n+    if not isinstance(pred, dict) or len(pred) != 1:\n+        return False, \"when 需要一种谓词\"\n+    if 'all' in pred:\n+        children = pred['all']\n+        if not isinstance(children, list) or not children or any(not isinstance(p, dict) or not p for p in children):\n+            return False, \"all 需要非空的谓词数组\"\n+        results = [eval_when(dw, child) for child in children]\n+        return all(hit for hit, _ in results), '；'.join(reason for _, reason in results)\n+    if 'symbol_exists' in pred or 'symbol_missing' in pred:\n+        key = next(iter(pred))\n+        name = pred[key]\n+        if not isinstance(name, str) or not name.strip():\n+            return False, \"符号名不能为空\"\n+        symbols = getattr(dw, 'defined_symbols', None)\n+        if symbols is None:\n+            return False, \"没有完整 ELF 符号表\"\n+        exists = name in symbols\n+        return (exists if key == 'symbol_exists' else not exists), f\"符号 {name} {'在' if exists else '不在'}\"\n \n     if \"type_exists\" in pred:\n         want = pred[\"type_exists\"]\n"
      },
      {
        "path": "nodefusion/model/snapshot.py",
        "sha256": "e9c4ce76b858a9003e43d9eec363e1b88d4024338c3401b7a47a9871fe5dab7a",
        "patch": "diff --git a/nodefusion/model/snapshot.py b/nodefusion/model/snapshot.py\nindex fa095ef..0bf7cb7 100644\n--- a/nodefusion/model/snapshot.py\n+++ b/nodefusion/model/snapshot.py\n@@ -68,6 +68,8 @@ def is_live(entity: Entity, liveness: dict | None) -> bool:\n         return True\n     if \"equals\" in sw:\n         return f.value != sw[\"equals\"]\n+    if \"one_of\" in sw:\n+        return f.value not in sw[\"one_of\"]\n     return True\n \n \n"
      },
      {
        "path": "nodefusion/host/bundle.py",
        "sha256": "cec890de70422513db45c7a592e758c9dba368a638fc2b337d0e3156a607f8e0",
        "patch": "diff --git a/nodefusion/host/bundle.py b/nodefusion/host/bundle.py\nindex a31f11f..f96d198 100644\n--- a/nodefusion/host/bundle.py\n+++ b/nodefusion/host/bundle.py\n@@ -8,13 +8,14 @@ import zlib\n from collections import Counter\n from pathlib import Path\n \n-from ..model.symbols import demangle, demangle_v0\n+from ..model.symbols import display_name\n from . import guest as guest_mod\n from .analyze import Analysis\n \n MAX_EVENTS = 150_000\n \n MIN_SPARE_EVENTS = 25_000\n+MIN_KIND_EVENTS = 64\n \n DIAGNOSTIC_PREFIXES = (\"func.\",)\n \n@@ -57,6 +58,25 @@ class Interner:\n         return i\n \n \n+def _kind_budgets(counts: dict[str, int], budget: int) -> tuple[dict[str, int], int]:\n+    if not counts:\n+        return {}, 0\n+    floor = min(MIN_KIND_EVENTS, budget // len(counts))\n+    if floor == 0:\n+        return {kind: int(index < budget) for index, kind in enumerate(counts)}, 0\n+    quotas = {kind: min(count, floor) for kind, count in counts.items()}\n+    remaining = budget - sum(quotas.values())\n+    residual_total = sum(counts.values()) - sum(quotas.values())\n+    cumulative = 0\n+    if residual_total:\n+        for kind, count in counts.items():\n+            residual = count - quotas[kind]\n+            quotas[kind] += ((cumulative + residual) * remaining // residual_total\n+                             - cumulative * remaining // residual_total)\n+            cumulative += residual\n+    return quotas, floor\n+\n+\n def _event_selection(events: list, *, materialize: bool) -> tuple[list, dict]:\n     \"\"\"Bound the interactive event stream while auditing the full raw trace.\"\"\"\n     raw_kinds = Counter(e.kind for e in events)\n@@ -65,7 +85,7 @@ def _event_selection(events: list, *, materialize: bool) -> tuple[list, dict]:\n     if len(events) <= MAX_EVENTS:\n         return (events if materialize else []), {\n             \"applied\": False,\n-            \"policy\": \"kind-preserving/systematic-v3\",\n+            \"policy\": \"kind-preserving/systematic-v5\",\n             \"raw\": len(events), \"retained\": len(events), \"dropped\": 0,\n             \"target_limit\": MAX_EVENTS, \"minimum_spare\": MIN_SPARE_EVENTS,\n             \"always_keep\": \"all events when the raw stream fits\",\n@@ -77,37 +97,32 @@ def _event_selection(events: list, *, materialize: bool) -> tuple[list, dict]:\n         }\n \n     spare_raw = len(events) - priority_raw\n-    semantic_kinds = {k for k in raw_kinds if _is_semantic(k)}\n-    reserved_spare = min(MIN_SPARE_EVENTS, spare_raw)\n+    semantic_counts = {k: count for k, count in raw_kinds.items() if _is_semantic(k)}\n+    reserved_spare = min(MIN_SPARE_EVENTS, spare_raw, MAX_EVENTS)\n     priority_budget = min(priority_raw, MAX_EVENTS - reserved_spare)\n+    quotas, kind_floor = _kind_budgets(semantic_counts, priority_budget)\n     room = MAX_EVENTS - priority_budget\n-    step = max(1, spare_raw // room) if room > 0 and spare_raw else 1\n+    diagnostic_counts = {k: count for k, count in raw_kinds.items() if not _is_semantic(k)}\n+    diagnostic_quotas, diagnostic_floor = _kind_budgets(diagnostic_counts, min(room, spare_raw))\n+    quotas.update(diagnostic_quotas)\n     chosen: list = []\n     retained_kinds: Counter = Counter()\n     dropped_kinds: dict[str, int] = {}\n-    spare_seen = 0\n-    spare_kept = 0\n     semantic_seen = 0\n-    first_kinds: set[str] = set()\n-    nonfirst_seen = 0\n-    nonfirst_total = priority_raw - len(semantic_kinds)\n-    nonfirst_budget = max(0, priority_budget - len(semantic_kinds))\n+    seen_by_kind: Counter = Counter()\n     for e in events:\n         if _is_semantic(e.kind):\n             semantic_seen += 1\n-            if e.kind not in first_kinds:\n-                first_kinds.add(e.kind)\n-                retain = len(first_kinds) <= priority_budget\n-            else:\n-                retain = (nonfirst_total > 0 and\n-                          (nonfirst_seen + 1) * nonfirst_budget // nonfirst_total\n-                          > nonfirst_seen * nonfirst_budget // nonfirst_total)\n-                nonfirst_seen += 1\n+        seen = seen_by_kind[e.kind]\n+        seen_by_kind[e.kind] += 1\n+        quota = quotas[e.kind]\n+        total = raw_kinds[e.kind]\n+        if seen == 0:\n+            retain = quota > 0\n         else:\n-            retain = room > 0 and spare_kept < room and spare_seen % step == 0\n-            spare_seen += 1\n-            if retain:\n-                spare_kept += 1\n+            retain = (quota > 1 and\n+                      seen * (quota - 1) // (total - 1)\n+                      > (seen - 1) * (quota - 1) // (total - 1))\n         if retain:\n             retained_kinds[e.kind] += 1\n             if materialize:\n@@ -120,15 +135,19 @@ def _event_selection(events: list, *, materialize: bool) -> tuple[list, dict]:\n \n     return chosen, {\n         \"applied\": True,\n-        \"policy\": \"kind-preserving/systematic-v3\",\n+        \"policy\": \"kind-preserving/systematic-v5\",\n         \"raw\": len(events), \"retained\": retained, \"dropped\": dropped,\n         \"target_limit\": MAX_EVENTS, \"minimum_spare\": MIN_SPARE_EVENTS,\n-        \"always_keep\": \"first event of each normalized kind within budget\",\n+        \"always_keep\": \"all events of kinds whose count fits their per-kind budget\",\n         \"priority_raw\": priority_raw, \"spare_raw\": spare_raw,\n         \"semantic_budget\": priority_budget,\n+        \"minimum_per_kind\": kind_floor,\n+        \"semantic_kind_budgets\": {k: quotas[k] for k in sorted(semantic_counts)},\n+        \"diagnostic_kind_budgets\": dict(sorted(diagnostic_quotas.items())),\n+        \"minimum_per_diagnostic_kind\": diagnostic_floor,\n         \"semantic_retained\": semantic_seen - sum(v for k, v in dropped_kinds.items()\n                                                 if _is_semantic(k)),\n-        \"spare_budget\": room, \"stride\": step if room > 0 and spare_raw else None,\n+        \"spare_budget\": room, \"stride\": None,\n         \"retained_kinds\": dict(sorted(retained_kinds.items())),\n         \"dropped_kinds\": dict(sorted(dropped_kinds.items())),\n     }\n@@ -493,7 +512,11 @@ def build(a: Analysis) -> dict:\n         a.events, getattr(a.trace, \"function_returns\", ()), a.elf,\n         retained_ids={id(e) for e in events})\n     metrics = a.metrics()\n-    caller_cache: dict[str, str] = {}\n+    display_cache: dict[str, str] = {}\n+    def display(raw):\n+        if raw not in display_cache:\n+            display_cache[raw] = display_name(raw)\n+        return display_cache[raw]\n \n     ev = {\n         \"insn\": [], \"cpu\": [], \"kind\": [], \"res\": [], \"pid\": [],\n@@ -508,19 +531,14 @@ def build(a: Analysis) -> dict:\n         ev[\"res\"].append(res_i(e.resource))\n         ev[\"pid\"].append(e.pid if e.pid is not None else -1)\n         ev[\"pc\"].append(e.pc or 0)\n-        ev[\"func\"].append(fn(e.func))\n+        ev[\"func\"].append(fn(display(e.func)) if e.func else fn(None))\n         ev[\"entry\"].append(1 if e.function_entry else 0)\n-        ev[\"entry_name\"].append(fn(e.entry_name) if e.entry_name else -1)\n+        ev[\"entry_name\"].append(fn(display(e.entry_name)) if e.entry_name else -1)\n         caller = None\n         if e.function_entry and e.return_address and a.elf is not None:\n             raw, _ = a.elf.resolve_pc(e.return_address)\n             if raw:\n-                caller = caller_cache.get(raw)\n-                if caller is None:\n-                    caller = (demangle(raw)\n-                              or demangle_v0(raw, impls=True, generics=True)\n-                              or raw)\n-                    caller_cache[raw] = caller\n+                caller = display(raw)\n         ev[\"caller\"].append(fn(caller) if caller else -1)\n         path = stack_paths.get(id(e))\n         ev[\"stack\"].append([fn(label) for label in path] if path else None)\n@@ -657,10 +675,15 @@ def build(a: Analysis) -> dict:\n \n def _samples(a: Analysis) -> dict:\n     fn = Interner()\n+    labels = {}\n     out = {\"insn\": [], \"cpu\": [], \"pc\": [], \"priv\": [], \"func\": []}\n     step = max(1, len(a.trace.samples) // 20000)\n     for s in a.trace.samples[::step]:\n         name, _ = a.elf.resolve_pc(s.pc)\n+        if name:\n+            if name not in labels:\n+                labels[name] = display_name(name)\n+            name = labels[name]\n         out[\"insn\"].append(s.insn)\n         out[\"cpu\"].append(s.cpu)\n         out[\"pc\"].append(s.pc)\n"
      },
      {
        "path": "nodefusion/tests/test_bundle_shape.py",
        "sha256": "55f2f20855a890967caba83581ca1dda43fa6606a5af6ab1ee7b07b074e7c82b",
        "patch": "diff --git a/nodefusion/tests/test_bundle_shape.py b/nodefusion/tests/test_bundle_shape.py\nindex 40bd9fe..80984c3 100644\n--- a/nodefusion/tests/test_bundle_shape.py\n+++ b/nodefusion/tests/test_bundle_shape.py\n@@ -1,5 +1,6 @@\n \n import sys\n+from collections import Counter\n from pathlib import Path\n from types import SimpleNamespace as NS\n \n@@ -73,6 +74,23 @@ def test_caller_names_demangle_rust_trait_impls():\n         \"starry_kernel::mm::aspace::backend::cow::CowBackend::clone_map\"\n \n \n+def test_raw_function_entry_and_pc_names_share_readable_labels():\n+    raw = '_ZN2os4root17h1234567890abcdefE'\n+    a = _analysis(_state())\n+    event = Event(1, 0, 'func.root', 'function', func=raw,\n+                  function_entry=True, entry_name=raw, return_address=0x80001000)\n+    a.elf = NS(resolve_pc=lambda addr: (raw, 0))\n+    a.events = [event]\n+    a.trace.samples = [NS(insn=1, cpu=0, pc=0x80001000, priv=1)]\n+    result = B.build(a)\n+    funcs = result['dict']['funcs']\n+    for key in ['func', 'entry_name', 'caller']:\n+        assert funcs[result['events'][key][0]] == 'os::root'\n+    assert event.entry_name == raw\n+    assert event.func == raw\n+    assert result['samples']['funcs'][result['samples']['func'][0]] == 'os::root'\n+\n+\n def test_resources_is_always_there_even_when_empty():\n     b = B.build(_analysis(_state(reason=\"没声明\")))\n     assert b[\"states\"][0][\"resources\"] == []\n@@ -144,7 +162,8 @@ def test_event_selection_metadata_accounts_for_every_raw_event(monkeypatch):\n     assert audit[\"priority_raw\"] == 4\n     assert audit[\"spare_raw\"] == 26\n     assert audit[\"spare_budget\"] == 6\n-    assert audit[\"stride\"] == 4\n+    assert audit[\"stride\"] is None\n+    assert audit['diagnostic_kind_budgets'] == {'func.hot_path': 6}\n     assert sum(audit[\"retained_kinds\"].values()) == audit[\"retained\"]\n     assert sum(audit[\"dropped_kinds\"].values()) == audit[\"dropped\"]\n     assert [e.insn for e in selected[:4]] == [0, 1, 2, 3]\n@@ -156,10 +175,9 @@ def test_bounded_selector_preserves_order_and_systematic_sample(monkeypatch):\n     events = [NS(kind=(\"proc.fork\" if i in {2, 7} else \"func.hot\"), insn=i)\n               for i in range(12)]\n     selected, audit = B._select_events(events)\n-    # Ten diagnostics, four spare slots => old spare[::2][:4], interleaved\n-    # with both semantic events in original timeline order.\n-    assert [event.insn for event in selected] == [0, 2, 3, 5, 7, 8]\n-    assert audit[\"stride\"] == 2\n+    # Four per-kind positions include the first and last diagnostic entries.\n+    assert [event.insn for event in selected] == [0, 2, 4, 7, 8, 11]\n+    assert audit[\"stride\"] is None\n     assert audit[\"retained\"] == 6\n \n \n@@ -178,6 +196,79 @@ def test_large_semantic_stream_stays_browser_bounded(monkeypatch):\n     assert audit[\"raw\"] == audit[\"retained\"] + audit[\"dropped\"]\n \n \n+def test_rare_semantic_events_survive_hot_kinds_without_kernel_allowlists(monkeypatch):\n+    monkeypatch.setattr(B, 'MAX_EVENTS', 200)\n+    monkeypatch.setattr(B, 'MIN_SPARE_EVENTS', 25)\n+    events = [NS(kind='pagetable.map', insn=i) for i in range(5000)]\n+    events += [NS(kind='future_namespace.branch', insn=5000 + i) for i in range(13)]\n+    events += [NS(kind='trap.page_fault', insn=5013 + i) for i in range(4)]\n+    events += [NS(kind='func.loop', insn=5017 + i) for i in range(1000)]\n+    selected, audit = B._select_events(events)\n+    assert len(selected) == audit['retained'] == 200\n+    assert audit['retained_kinds']['future_namespace.branch'] == 13\n+    assert audit['retained_kinds']['trap.page_fault'] == 4\n+    assert audit['retained_kinds']['func.loop'] == 25\n+    assert audit['semantic_retained'] == 175\n+    assert audit['semantic_kind_budgets']['pagetable.map'] == 158\n+    hot = [item.insn for item in selected if item.kind == 'pagetable.map']\n+    assert hot[0] == 0 and hot[-1] == 4999\n+    assert [item.insn for item in selected] == sorted(item.insn for item in selected)\n+    assert B._select_events(events)[0] == selected\n+    empty, accounting = B._event_selection(events, materialize=False)\n+    assert empty == [] and accounting == audit\n+    for kind, count in Counter(item.kind for item in events).items():\n+        assert audit['retained_kinds'].get(kind, 0) + audit['dropped_kinds'].get(kind, 0) == count\n+\n+\n+def test_more_semantic_kinds_than_slots_is_still_bounded(monkeypatch):\n+    monkeypatch.setattr(B, 'MAX_EVENTS', 7)\n+    monkeypatch.setattr(B, 'MIN_SPARE_EVENTS', 2)\n+    events = [NS(kind=f'new.kind{i}', insn=i) for i in range(20)]\n+    events += [NS(kind='func.noise', insn=20 + i) for i in range(20)]\n+    selected, audit = B._select_events(events)\n+    assert len(selected) == 7\n+    assert audit['semantic_retained'] == 5 and audit['retained_kinds']['func.noise'] == 2\n+    assert sum(audit['semantic_kind_budgets'].values()) == 5\n+    assert [item.kind for item in selected[:5]] == [f'new.kind{i}' for i in range(5)]\n+    assert sum(audit['dropped_kinds'].values()) == 33\n+    assert B._event_selection(events, materialize=False)[1] == audit\n+\n+\n+def test_rare_function_entries_survive_hot_diagnostic_functions(monkeypatch):\n+    monkeypatch.setattr(B, 'MAX_EVENTS', 100)\n+    monkeypatch.setattr(B, 'MIN_SPARE_EVENTS', 25)\n+    events = [NS(kind='syscall.enter', insn=i) for i in range(1000)]\n+    events += [NS(kind='func.format', insn=1000 + i) for i in range(2000)]\n+    events += [NS(kind='func.unmap', insn=3000 + i) for i in range(2)]\n+    selected, audit = B._select_events(events)\n+    assert len(selected) == 100\n+    assert audit['retained_kinds']['func.unmap'] == 2\n+    assert audit['retained_kinds']['func.format'] == 23\n+    assert not audit['dropped_kinds'].get('func.unmap')\n+    assert selected[-1] is events[-1]\n+\n+\n+def test_kind_quotas_use_the_budget_without_exceeding_raw_counts():\n+    for counts in [{'one': 1}, {'a': 2, 'b': 1000, 'c': 9},\n+                   {str(index): index + 1 for index in range(100)}]:\n+        total = sum(counts.values())\n+        for budget in range(min(total, 300) + 1):\n+            quotas, floor = B._kind_budgets(counts, budget)\n+            assert sum(quotas.values()) == budget\n+            assert all(0 <= quotas[kind] <= count for kind, count in counts.items())\n+            assert all(quotas[kind] == count for kind, count in counts.items() if count <= floor)\n+\n+\n+def test_diagnostic_reservation_cannot_exceed_total_budget(monkeypatch):\n+    monkeypatch.setattr(B, 'MAX_EVENTS', 4)\n+    monkeypatch.setattr(B, 'MIN_SPARE_EVENTS', 25)\n+    events = [NS(kind='syscall.enter', insn=0)]\n+    events += [NS(kind='func.hot', insn=i) for i in range(1, 30)]\n+    selected, audit = B._select_events(events)\n+    assert len(selected) == 4 and audit['semantic_budget'] == 0\n+    assert audit['dropped_kinds']['syscall.enter'] == 1\n+\n+\n def test_interactive_sampling_does_not_erase_raw_semantic_coverage(monkeypatch):\n     monkeypatch.setattr(B, \"MAX_EVENTS\", 10)\n     monkeypatch.setattr(B, \"MIN_SPARE_EVENTS\", 3)\n"
      },
      {
        "path": "nodefusion/tests/test_kernel_integrations.py",
        "sha256": "8e3ecdcf6ad5ea3b7fa44a3e3244a2c9678255b62c02d8cd48de9cfc1189b376",
        "patch": "diff --git a/nodefusion/tests/test_kernel_integrations.py b/nodefusion/tests/test_kernel_integrations.py\nindex a285e88..b33e6b0 100644\n--- a/nodefusion/tests/test_kernel_integrations.py\n+++ b/nodefusion/tests/test_kernel_integrations.py\n@@ -64,7 +64,7 @@ def test_rcore_patch_and_manifest_agree_on_the_per_region_hook():\n     assert manifest.events[symbol].kind == \"vm.unmap\"\n     assert manifest.events[symbol].args == [\"start_vpn\", \"end_vpn\"]\n     assert manifest.absent[\"vm.unmap\"].when == {\n-        \"type_missing\": \"os::task::processor::Processor\"}\n+        \"type_missing\": \"os::mm::memory_set::MemorySet\"}\n \n \n def test_rcore_patch_exports_exact_physical_allocation_results():\n@@ -79,6 +79,38 @@ def test_rcore_patch_exports_exact_physical_allocation_results():\n     assert \"nodefusion_trace_sched_switch\" in patch\n \n \n+def test_rcore_reference_region_removal_is_an_attempt_not_a_success_event():\n+    manifest = load(ROOT / 'manifests/rcore.toml')\n+    symbol = 'os::mm::memory_set::MemorySet::remove_framed_area'\n+    assert manifest.events[symbol].kind == 'vm.remove_area'\n+    assert manifest.events[symbol].args == ['self', 'start_vpn', 'end_vpn']\n+    dedicated = next(index for index, watch in enumerate(manifest.watches)\n+                     if watch.match.get('fn') == ['remove_framed_area'])\n+    inline = next(index for index, watch in enumerate(manifest.watches)\n+                  if watch.match.get('fn') == ['frame_alloc', 'frame_dealloc', 'unmap', 'init_heap'])\n+    assert dedicated < inline\n+    assert manifest.watches[dedicated].args == 3\n+    assert not manifest.watches[dedicated].inlined\n+\n+\n+def test_rcore_2026a_ch4_observation_patch_preserves_region_acceptance():\n+    patch = (INTEGRATIONS / 'rcore-2026a-ch4-observation.patch').read_text()\n+    assert patch.index('})?;') < patch.index('nodefusion_vm_unmap_region(start.0, end.0);')\n+    assert patch.index('nodefusion_vm_unmap_region(start.0, end.0);') < patch.index('let mut area = self.areas.remove(index);')\n+    assert 'const NFT_ALLOCATOR_STATE: u64 = 6;' in patch\n+    assert 'a: [free_pages as u64, used_pages as u64, 0, 0]' in patch\n+    assert 'nodefusion_trace_page(NFT_KALLOC, paddr, free_pages, used_pages)' in patch\n+    assert 'nodefusion_trace_page(NFT_KFREE, PhysAddr::from(ppn).0, free_pages, used_pages)' in patch\n+    assert 'GlobalAlloc::alloc(&self.0, layout)' in patch\n+    assert 'GlobalAlloc::dealloc(&self.0, ptr, layout)' in patch\n+    manifest = load(ROOT / 'manifests/rcore.toml')\n+    event = manifest.events['os::mm::page_table::PageTable::map']\n+    assert event.kind == 'pagetable.map' and event.args == ['self', 'vpn', 'ppn', 'flags']\n+    rule = next(watch for watch in manifest.watches\n+                if watch.match == {'module': 'os::mm::page_table::PageTable', 'fn': ['map']})\n+    assert rule.args == 4 and not rule.inlined\n+\n+\n def test_rcore_chapter_patches_preserve_per_region_and_scheduler_identity():\n     for chapter in (6, 8):\n         patch = (INTEGRATIONS / f\"rcore-ch{chapter}-nodefusion.patch\").read_text(\n@@ -94,6 +126,43 @@ def test_rcore_chapter_patches_preserve_per_region_and_scheduler_identity():\n     assert \"block_current_and_run_next\" in ch8\n \n \n+def test_2026a_ch5_observation_preserves_allocator_and_switch_semantics():\n+    rust = (INTEGRATIONS / 'rcore-2026a-ch5-observation.patch').read_text()\n+    c = (INTEGRATIONS / 'ucore-2026a-ch5-observation.patch').read_text()\n+    for patch in (rust, c):\n+        assert 'nftrace_commit_point' in patch\n+        assert 'nodefusion_pagetable_map' in patch or '#[inline(never)]' in patch\n+    assert 'self.allocated -= 1;' in rust\n+    assert 'self.allocated += 1;' in rust\n+    assert 'if result.is_some()' in rust\n+    assert 'frame.as_ref().map_or(0, |frame| PhysAddr::from(frame.ppn).0)' in rust\n+    assert 'pub(crate) const NO_TASK: usize = usize::MAX;' in rust\n+    assert 'emit(4, [from_task as u64, to_task as u64, from_pid as u64, to_pid as u64])' in rust\n+    assert 'crate::nftrace::NO_TASK, next_pid' in rust\n+    assert 'crate::nftrace::sched_switch(task_id, idle, pid, crate::nftrace::NO_TASK)' in rust\n+    assert rust.index('add_task(new_task);') < rust.index('crate::nftrace::process_fork(current_task.getpid(), new_pid);')\n+    assert 'nf_used_pages--;' in c\n+    assert 'nf_used_pages++;' in c\n+    assert c.index('nf_used_pages--;') < c.index('nftrace_page_free((uint64)pa, nf_free_pages, nf_used_pages);')\n+    assert c.index('add_task(np);') < c.index('nftrace_proc_fork(p->pid, np->pid);')\n+    assert 'nftrace_sched_switch((uint64)&idle, (uint64)p, (uint64)-1, p->pid);' in c\n+    assert 'nftrace_sched_switch((uint64)p, (uint64)&idle, p->pid, (uint64)-1);' in c\n+    assert c.index('*pte = PA2PTE(pa) | perm | PTE_V;') < c.index('nodefusion_pagetable_map(a, pa, perm | PTE_V);')\n+\n+\n+def test_rcore_2026a_ch5_region_hooks_only_describe_explicit_pte_removal():\n+    patch = (INTEGRATIONS / 'rcore-2026a-ch5-observation.patch').read_text()\n+    assert 'if mapped_end > area.vpn_range.get_start()' in patch\n+    assert 'nodefusion_vm_unmap_region(area.vpn_range.get_start().0, mapped_end.0);' in patch\n+    assert 'if self.vpn_range.get_start() < self.vpn_range.get_end()' in patch\n+    assert 'nodefusion_vm_unmap_region(self.vpn_range.get_start().0, self.vpn_range.get_end().0);' in patch\n+    assert 'if new_end < self.vpn_range.get_end()' in patch\n+    assert 'nodefusion_vm_unmap_region(new_end.0, self.vpn_range.get_end().0);' in patch\n+    # Releasing data-frame ownership on exit leaves the zombie page table alive.\n+    # Do not invent explicit PTE-removal events for that separate operation.\n+    assert 'self.areas.clear();' not in patch\n+\n+\n def test_rcore_ch8_keeps_applicable_vm_and_signal_watchpoints_callable():\n     patch = (INTEGRATIONS / \"rcore-page-table-observation-points.patch\").read_text()\n     assert patch.count(\"#[inline(never)]\") == 6\n@@ -161,7 +230,7 @@ def test_rcore_filesystem_absence_depends_on_the_resolved_build(monkeypatch):\n             (\"proc.alloc\", \"os::task::task::TaskControlBlock\"),\n             (\"proc.fork\", \"os::task::processor::Processor\"),\n             (\"proc.exec\", \"os::task::processor::Processor\"),\n-            (\"vm.unmap\", \"os::task::processor::Processor\"),\n+            (\"vm.unmap\", \"os::mm::memory_set::MemorySet\"),\n             (\"phys.alloc\", \"os::mm::frame_allocator::StackFrameAllocator\"),\n             (\"phys.free\", \"os::mm::frame_allocator::StackFrameAllocator\"),\n             (\"vm.map\", \"os::mm::memory_set::MemorySet\"),\n@@ -189,6 +258,28 @@ def test_ucore_patch_and_manifest_supply_exact_semantics():\n     assert manifest.absent[\"log.commit\"].why == \"feature\"\n \n \n+def test_ucore_2026a_ch4_patch_observes_allocator_results_and_committed_ptes():\n+    patch = (INTEGRATIONS / 'ucore-2026a-ch4-observation.patch').read_text()\n+    paths = [line.split(' b/', 1)[1] for line in patch.splitlines() if line.startswith('diff --git ')]\n+    assert set(paths) == {'os/kalloc.c', 'os/vm.c', 'os/nftrace.c', 'os/nftrace.h'}\n+    assert 'NFT_KALLOC = 1' in patch and 'NFT_KFREE = 5' in patch and 'NFT_ALLOCATOR_STATE = 6' in patch\n+    assert 'nftrace_page_alloc((uint64)l, 1, nf_free_pages, nf_used_pages)' in patch\n+    assert 'nftrace_page_free((uint64)pa, 1, nf_free_pages, nf_used_pages)' in patch\n+    assert 'nftrace_allocator_state(nf_free_pages, nf_used_pages)' in patch\n+    assert patch.index('*pte = PA2PTE(pa) | perm | PTE_V;') < patch.index('nodefusion_pagetable_map(a, pa, perm | PTE_V);')\n+    assert 'const struct nftrace_record record = { type, { a0, a1, a2, a3 } }' in patch\n+\n+\n+def test_ucore_2026a_ch4_page_table_experiment_owns_and_reclaims_its_pages():\n+    patch = (INTEGRATIONS / 'ucore-2026a-ch4-pagetable-experiment.patch').read_text()\n+    assert patch.index('uvmunmap(table, va, 1, 0)') < patch.index('uvmunmap(table, va, 1, 1)')\n+    assert patch.index('uvmunmap(table, TRAMPOLINE, 1, 0)') < patch.index('freewalk(table)')\n+    assert 'walkaddr(table, va + 0x123) != (uint64)frame' in patch\n+    assert 'useraddr(table, va + 0x123) != (uint64)frame + 0x123' in patch\n+    assert 'frame[0x123] != 0x5a' in patch\n+    assert patch.index('kvm_init();') < patch.index('nodefusion_pagetable_experiment();', patch.index('kvm_init();'))\n+\n+\n def test_ucore_showcase_fixes_remain_separate_from_observation_patch():\n     observation = (INTEGRATIONS / \"ucore-nodefusion.patch\").read_text()\n     kernel_fix = (INTEGRATIONS / \"ucore-ch8-showcase.patch\").read_text()\n@@ -204,6 +295,13 @@ def test_ucore_manifest_covers_all_eight_measured_shapes():\n     manifest = load(ROOT / \"manifests\" / \"ucore.toml\")\n     assert manifest.detect == {\"all_symbol\": [\"digits\", \"SBI_SHUTDOWN\"]}\n     assert manifest.derive_feature_absence_from_symbols is True\n+    process = manifest.entity(\"process\")\n+    assert process.liveness[\"skip_when\"] == {\n+        \"field\": \"state\", \"one_of\": [\"UNUSED\", \"P_UNUSED\"]}\n+    fields = {field.name: field for field in process.fields}\n+    assert fields[\"context\"].role == \"sched_context\"\n+    assert fields[\"trapframe\"].role == \"trap_context\"\n+    assert all(fields[name].optional for name in (\"context\", \"trapframe\", \"kstack\"))\n     parent = next(field for field in manifest.entity(\"process\").relations\n                   if field.name == \"parent\")\n     assert parent.optional is True\n"
      },
      {
        "path": "nodefusion/tests/test_resolve.py",
        "sha256": "b14f432eb380c5514b73431978b01b0d715ed9a49f92deb547358fb35dd4d8ec",
        "patch": "diff --git a/nodefusion/tests/test_resolve.py b/nodefusion/tests/test_resolve.py\nindex 0eeed28..585b0a8 100644\n--- a/nodefusion/tests/test_resolve.py\n+++ b/nodefusion/tests/test_resolve.py\n@@ -97,6 +97,30 @@ def test_missing_field_is_absent_not_a_failure():\n     assert resolve_path(dw, tcb, \"inner.priority\").state == ABSENT\n \n \n+def test_rcore_priority_spellings_resolve_without_kernel_branches():\n+    from nodefusion.model.manifest import builtin_dir, load\n+    from nodefusion.model.snapshot import Entity, Field\n+\n+    manifest = load(builtin_dir() / \"rcore.toml\")\n+    specs = [field for entity in manifest.entities if entity.name == \"task\"\n+             for field in entity.fields if field.role == \"priority\"]\n+    assert {field.path for field in specs} == {\"inner.prio\", \"inner.priority\"}\n+    assert all(field.optional for field in specs)\n+    for spelling in (\"prio\", \"priority\", None):\n+        dw, tcb = chain()\n+        if spelling:\n+            dw._s[6].fields[spelling] = 136\n+        fields = {}\n+        for spec in specs:\n+            resolved = resolve_path(dw, tcb, spec.path)\n+            fields[spec.name] = Field(spec.name, resolved.state,\n+                                      value=16 if resolved.state == PRESENT else None,\n+                                      role=spec.role)\n+        entity = Entity(\"task\", 0x1000, fields=fields)\n+        assert entity.role(\"priority\") == (16 if spelling else None)\n+        assert sum(field.ok for field in fields.values()) == (1 if spelling else 0)\n+\n+\n def test_missing_field_names_the_payload_type_not_just_the_wrapper():\n     dw, tcb = chain()\n     why = resolve_path(dw, tcb, \"inner.priority\").reason or \"\"\n"
      },
      {
        "path": "nodefusion/host/assets/app.css",
        "sha256": "4a6f97f6046f1658f683e28107b5e524cf64507c57e7ad76035a7e8d745740eb",
        "patch": "diff --git a/nodefusion/host/assets/app.css b/nodefusion/host/assets/app.css\nindex 88f5f82..f2adda9 100644\n--- a/nodefusion/host/assets/app.css\n+++ b/nodefusion/host/assets/app.css\n@@ -415,7 +415,7 @@ tr.sel td { background: color-mix(in oklch, var(--accent) 12%, var(--bg)); }\n .detail-empty-icon { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 6px; color: var(--accent); font-size: 21px; }\n .detail-empty h2 { color: var(--fg); font-size: 14px; margin: 16px 0 5px; }\n .detail-empty p { max-width: 28ch; margin: 0; line-height: 1.55; }\n-.trace-controls { display: flex; gap: 8px; margin: 0 0 16px; }\n+.trace-controls { display: flex; gap: 8px; margin: 0 0 16px; position: sticky; top: -22px; z-index: 2; background: var(--bg); padding-block: 8px; border-bottom: 1px solid var(--line); }\n .trace-controls input, .trace-controls select { height: 34px; min-width: 150px; padding: 6px 9px; border: 1px solid var(--line); border-radius: 5px; background: var(--bg2); color: var(--fg); }\n .trace-controls input { flex: 1; min-width: 220px; }\n .trace-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; min-height: 420px; }\n@@ -460,8 +460,8 @@ tr.sel td { background: color-mix(in oklch, var(--accent) 12%, var(--bg)); }\n   .right { width: 100%; max-height: 340px; border-left: 0; border-top: 1px solid var(--line); padding: 14px; }\n   .main.detail-collapsed .right { display: none; }\n   #evscroll { height: 54vh; }\n-  .trace-grid { grid-template-columns: 1fr; }\n-  .function-tree, .function-sequence { max-height: 42vh; }\n+  .trace-grid { grid-template-columns: 1fr; min-height: 0; align-items: start; }\n+  .function-tree, .function-sequence { min-height: 0; max-height: 42vh; }\n }\n @media (max-width: 560px) {\n   .brand-kicker, .shortcut-hint { display: none; }\n"
      },
      {
        "path": "nodefusion/host/assets/app.js",
        "sha256": "c253b16d88ddc73d1c78ec3729800800ad255b923712893dbe12f66faab2aca2",
        "patch": "diff --git a/nodefusion/host/assets/app.js b/nodefusion/host/assets/app.js\nindex 7f1256e..a87dcd9 100644\n--- a/nodefusion/host/assets/app.js\n+++ b/nodefusion/host/assets/app.js\n@@ -28,6 +28,7 @@ const NF = {\n   selPage: null,\n   selPid: null,\n   filters: { text: '', kind: '', res: '', pid: '', cpu: '', group: '', from: '', to: '' },\n+  functionFilters: {text: '', cpu: '', limit: '80', grouping: null},\n };\n \n /* ------------------------------------------------------------------ 工具 */\n@@ -1641,6 +1642,10 @@ function renderFunctions() {\n   if (returns.nested_entries) grouping.appendChild(new Option('观测调用链', 'stack'));\n   if (returns.nested_entries) grouping.value = 'stack';\n   else if (!entries.some((e) => e.caller)) grouping.value = 'namespace';\n+  search.value = NF.functionFilters.text;\n+  cpu.value = NF.functionFilters.cpu;\n+  limit.value = NF.functionFilters.limit;\n+  if ([...grouping.options].some(option => option.value === NF.functionFilters.grouping)) grouping.value = NF.functionFilters.grouping;\n   controls.appendChild(search); controls.appendChild(cpu); controls.appendChild(grouping);\n   controls.appendChild(limit); p.appendChild(controls);\n \n@@ -1658,6 +1663,7 @@ function renderFunctions() {\n   grid.appendChild(treePanel); grid.appendChild(sequencePanel); p.appendChild(grid);\n \n   function paint() {\n+    NF.functionFilters = {text: search.value, cpu: cpu.value, limit: limit.value, grouping: grouping.value};\n     const q = search.value.trim().toLowerCase();\n     const selectedCpu = cpu.value;\n     const filtered = entries.filter((e) => (!q || e.fn.toLowerCase().includes(q) || e.caller.toLowerCase().includes(q) || (e.path || []).some((name) => name.toLowerCase().includes(q))) && (selectedCpu === '' || String(e.cpu) === selectedCpu));\n"
      },
      {
        "path": "nodefusion/tests/test_phys_alloc_gate.py",
        "sha256": "a1b68458d8268d052082ad92b80f86753c46423eec7c86c3bdd6019e23b8186a",
        "patch": "diff --git a/nodefusion/tests/test_phys_alloc_gate.py b/nodefusion/tests/test_phys_alloc_gate.py\nindex 3cb406d..ec2bc43 100644\n--- a/nodefusion/tests/test_phys_alloc_gate.py\n+++ b/nodefusion/tests/test_phys_alloc_gate.py\n@@ -128,6 +128,51 @@ def test_sched_semantic_record_fills_both_endpoints_without_snapshots():\n     assert event.detail[\"from_proc\"] == \"kernel-task#41\"\n     assert event.detail[\"to_task_id\"] == 42\n     assert event.detail[\"to_pid\"] == 7\n+    assert event.pid == 7\n+    assert a._attribute(0, -1, {}) == (7, \"task#7\")\n+\n+\n+def test_semantic_switch_attribution_survives_missing_and_reused_snapshot_slots():\n+    a = object.__new__(A.Analysis)\n+    a._pid_by_slot_at = lambda *_: (99, \"stale slot\")\n+    slots = {0: 3, 1: 4}\n+    assert a._attribute(0, 0, slots) == (99, \"stale slot\")\n+    a._nftrace_event(NfTraceRec(insn=100, cpu=0, type=a.NFT_SCHED_SWITCH,\n+                              a=(10, 20, a.NFT_NO_TASK, 7)), -1, slots)\n+    assert a._attribute(0, -1, {}) == (7, \"task#7\")\n+    assert a._attribute(0, 200, slots) == (7, \"task#7\")\n+    assert a._attribute(1, 0, slots) == (99, \"stale slot\")\n+    alloc = a._nftrace_event(NfTraceRec(insn=101, cpu=0, type=a.NFT_KALLOC,\n+                                      a=(0x81234000, 1, 9, 1)), -1, {})\n+    assert alloc.pid == 7\n+\n+\n+def test_semantic_switches_track_each_cpu_and_distinguish_pid_zero_from_idle():\n+    a = object.__new__(A.Analysis)\n+    for cpu, pid in [(0, 0), (1, 7)]:\n+        a._nftrace_event(NfTraceRec(insn=100 + cpu, cpu=cpu, type=a.NFT_SCHED_SWITCH,\n+                                  a=(10 + cpu, 20 + cpu, a.NFT_NO_TASK, pid)), -1, {})\n+    assert a._attribute(0, -1, {}) == (0, \"task#0\")\n+    assert a._attribute(1, -1, {}) == (7, \"task#7\")\n+    a._nftrace_event(NfTraceRec(insn=102, cpu=0, type=a.NFT_SCHED_SWITCH,\n+                              a=(20, 10, 0, a.NFT_NO_TASK)), -1, {})\n+    assert a._attribute(0, -1, {}) == (None, \"kernel-task#10\")\n+    assert a._attribute(1, -1, {}) == (7, \"task#7\")\n+\n+\n+def test_rebuilding_events_resets_semantic_ownership_without_using_future_switches():\n+    a = object.__new__(A.Analysis)\n+    a.ncpu = 1\n+    a.states = []\n+    a.events = []\n+    a._semantic_current = {0: (99, \"previous analysis\")}\n+    a.trace = NS(discons=[], watch_hits=[], nftrace=[\n+        NfTraceRec(insn=1, cpu=0, type=a.NFT_KALLOC, a=(0x81234000, 1, 9, 1)),\n+        NfTraceRec(insn=2, cpu=0, type=a.NFT_SCHED_SWITCH, a=(10, 20, a.NFT_NO_TASK, 7)),\n+        NfTraceRec(insn=3, cpu=0, type=a.NFT_KALLOC, a=(0x81235000, 1, 8, 2)),\n+    ])\n+    a.build_events()\n+    assert [event.pid for event in a.events] == [None, 7, 7]\n \n \n def test_kfree_semantic_record_has_physical_range():\n"
      },
      {
        "path": "nodefusion/host/callstack.py",
        "sha256": "7a1ce5d70940e2c98792f57543e3df2cbc7b9f96ec5d8c7b280ccf17c78f9bde",
        "patch": "diff --git a/nodefusion/host/callstack.py b/nodefusion/host/callstack.py\nindex edae6fe..6f42814 100644\n--- a/nodefusion/host/callstack.py\n+++ b/nodefusion/host/callstack.py\n@@ -4,7 +4,7 @@ from __future__ import annotations\n \n import heapq\n \n-from ..model.symbols import demangle, demangle_v0\n+from ..model.symbols import display_name\n from . import nftrace\n \n \n@@ -20,6 +20,11 @@ def observed_stacks(events, returns, elf, retained_ids=None):\n     matched = 0\n     nested = 0\n     caller_cache = {}\n+    label_cache = {}\n+    def label(name):\n+        if name not in label_cache:\n+            label_cache[name] = display_name(name)\n+        return label_cache[name]\n     if not returns:\n         return paths, {\"raw\": 0, \"matched\": 0, \"nested_entries\": 0}\n     entries = ((e.insn, 0, e.cpu, e) for e in events\n@@ -49,10 +54,13 @@ def observed_stacks(events, returns, elf, retained_ids=None):\n         parent = frames[-1] if frames else None\n         if obj.return_address not in caller_cache:\n             raw = elf.resolve_pc(obj.return_address)[0] if elf else None\n-            caller_cache[obj.return_address] = (\n-                demangle(raw) or demangle_v0(raw) or raw) if raw else None\n+            caller_cache[obj.return_address] = raw\n         caller = caller_cache[obj.return_address]\n-        if (parent is None or parent.entry_name != caller or\n+        # Raw symbols distinguish Rust instantiations with the same display\n+        # name. Older producers may already supply a decoded entry name.\n+        caller_matches = (parent is not None and caller is not None and\n+                          (parent.entry_name == caller or parent.entry_name == label(caller)))\n+        if (not caller_matches or\n                 parent.address_space != obj.address_space or\n                 obj.stack_pointer > parent.stack_pointer):\n             frames.clear()\n@@ -60,7 +68,7 @@ def observed_stacks(events, returns, elf, retained_ids=None):\n             frames.clear()\n         frames.append(obj)\n         if retained_ids is None or id(obj) in retained_ids:\n-            paths[id(obj)] = tuple(f.entry_name or f.func or f.kind for f in frames[-16:])\n+            paths[id(obj)] = tuple(label(f.entry_name or f.func or f.kind) for f in frames[-16:])\n         if len(frames) > 1:\n             nested += 1\n     return paths, {\"raw\": len(returns), \"matched\": matched,\n"
      },
      {
        "path": "nodefusion/model/symbols.py",
        "sha256": "39f23be73d754e52221a4889c0101d50d8d8962ec21f1628d1cc36f07acdecb8",
        "patch": "diff --git a/nodefusion/model/symbols.py b/nodefusion/model/symbols.py\nindex 8bf19dc..7310e65 100644\n--- a/nodefusion/model/symbols.py\n+++ b/nodefusion/model/symbols.py\n@@ -41,6 +41,10 @@ def demangle(sym: str) -> str | None:\n     return _demangle_legacy(sym) or demangle_v0(sym)\n \n \n+def display_name(sym: str) -> str:\n+    return demangle(sym) or demangle_v0(sym, impls=True, generics=True) or sym\n+\n+\n def _demangle_legacy(sym: str) -> str | None:\n     s = _LLVM_SUFFIX.sub(\"\", sym)\n     if not s.startswith(\"_ZN\") or not s.endswith(\"E\"):\n"
      },
      {
        "path": "nodefusion/tests/test_callstack.py",
        "sha256": "78bc55f0ccf1a6dde2836aaa256ca0ce9fc0f9b4c6dcc4b144732460144d901e",
        "patch": "diff --git a/nodefusion/tests/test_callstack.py b/nodefusion/tests/test_callstack.py\nindex 4e2b5f5..9c91f75 100644\n--- a/nodefusion/tests/test_callstack.py\n+++ b/nodefusion/tests/test_callstack.py\n@@ -55,3 +55,27 @@ def test_unretained_entries_still_shape_retained_stack():\n                                     Elf(), retained_ids={id(child)})\n     assert paths == {id(child): (\"root\", \"child\")}\n     assert counts[\"matched\"] == 1\n+\n+\n+def test_rust_raw_symbols_match_and_display_as_function_names():\n+    raw_root = '_ZN2os4root17h1234567890abcdefE'\n+    raw_child = '_ZN2os5child17h1234567890abcdefE'\n+    root = entry(1, raw_root, 0x99, 100)\n+    child = entry(2, raw_child, 0x10, 80)\n+    elf = type('RustElf', (), {'resolve_pc': lambda self, pc: (raw_root, 0) if pc == 0x10 else (None, 0)})()\n+    paths, counts = observed_stacks([root, child], [ret(3, 0x10, 80)], elf)\n+    assert paths[id(child)] == ('os::root', 'os::child')\n+    assert counts['nested_entries'] == 1\n+    assert root.entry_name == raw_root\n+    assert child.entry_name == raw_child\n+\n+\n+def test_decoded_names_do_not_merge_distinct_raw_rust_symbols():\n+    raw_root = '_ZN2os4root17h1234567890abcdefE'\n+    other_root = '_ZN2os4root17hfedcba0987654321E'\n+    root = entry(1, raw_root, 0x99, 100)\n+    child = entry(2, 'child', 0x10, 80)\n+    elf = type('RustElf', (), {'resolve_pc': lambda self, pc: (other_root, 0) if pc == 0x10 else (None, 0)})()\n+    paths, counts = observed_stacks([root, child], [ret(3, 0x10, 80)], elf)\n+    assert paths[id(child)] == ('child',)\n+    assert counts['nested_entries'] == 0\n"
      },
      {
        "path": "nodefusion/tests/test_event_kinds.py",
        "sha256": "67eee9315e36a7484d1141590701ad8e4e23c4be212b1ac9c0c4949983beef52",
        "patch": "diff --git a/nodefusion/tests/test_event_kinds.py b/nodefusion/tests/test_event_kinds.py\nindex c681f50..0117daf 100644\n--- a/nodefusion/tests/test_event_kinds.py\n+++ b/nodefusion/tests/test_event_kinds.py\n@@ -104,6 +104,23 @@ def test_a_manifest_without_the_section_still_loads(tmp_path):\n     assert _load(tmp_path, \"\").events == {}\n \n \n+def test_ucore_shutdown_is_not_a_panic_or_an_argument_bearing_call():\n+    man = M.load(DRAFTS / \"ucore.toml\")\n+    event = man.events[\"shutdown\"]\n+    assert event.kind == \"kernel.shutdown\"\n+    assert event.args == []\n+    watches = [w for w in man.watches if \"shutdown\" in w.match.get(\"fn\", [])]\n+    assert watches and all(w.args == 0 for w in watches)\n+    for name, symbol in [(\"xv6\", \"panic\"), (\"rcore\", \"os::lang_items::panic\")]:\n+        assert M.load(DRAFTS / f\"{name}.toml\").events[symbol].kind == \"kernel.panic\"\n+\n+\n+def test_new_manifest_does_not_relabel_a_historical_recording():\n+    events = M.load(DRAFTS / \"ucore.toml\").events\n+    assert event_shape(\"shutdown\", {\"kind\": \"kernel.panic\", \"params\": [\"reason\"]},\n+                       kernel_kind=\"ucore\", events=events)[0] == \"kernel.panic\"\n+\n+\n \n def _shape(name, *, kind=\"\", resource=\"kernel\", params=(), kernel):\n     entry = {\"resource\": resource, \"params\": list(params)}\n"
      },
      {
        "path": "nodefusion/tests/test_no_build.py",
        "sha256": "4bc6168bfe29297a6cb93ec91824dcbb9764c9ae8551f3d71446cd97e619d4ad",
        "patch": "diff --git a/nodefusion/tests/test_no_build.py b/nodefusion/tests/test_no_build.py\nindex 5fa5c28..d5a3c25 100644\n--- a/nodefusion/tests/test_no_build.py\n+++ b/nodefusion/tests/test_no_build.py\n@@ -48,7 +48,7 @@ def test_it_records_without_building(tmp_path):\n     assert \"跳过构建\" in out\n \n \n-def test_it_says_out_loud_that_nothing_was_built(tmp_path):\n+def test_warning_identifies_the_existing_build_and_checksum_record(tmp_path):\n     r = _recorder(tmp_path, _tree(tmp_path))\n     r.build_kernel()\n     assert len(r.warnings) == 1\n@@ -56,7 +56,8 @@ def test_it_says_out_loud_that_nothing_was_built(tmp_path):\n     assert \"--no-build\" in w\n     assert \"kernel.elf\" in w\n     assert \"UTC\" in w\n-    assert \"没人验证过\" in w\n+    assert \"这次没有编译\" in w\n+    assert \"kernel_elf_identity\" in w\n \n \n def test_a_missing_elf_is_fatal(tmp_path):\n"
      },
      {
        "path": "nodefusion/tests/test_record_icount.py",
        "sha256": "f76528d2c5a7fc18938d0afc88b5ee9e9626d63801bccc6ced57c1e4b2c823a0",
        "patch": "diff --git a/nodefusion/tests/test_record_icount.py b/nodefusion/tests/test_record_icount.py\nindex 8e8d223..25ae2a0 100644\n--- a/nodefusion/tests/test_record_icount.py\n+++ b/nodefusion/tests/test_record_icount.py\n@@ -1,9 +1,46 @@\n from pathlib import Path\n from types import SimpleNamespace\n \n-from nodefusion.host.record import (Recorder, RunConfig, _calibration_watchlist,\n+import pytest\n+\n+from nodefusion.host.record import (NO_PROGRAM, Recorder, RunConfig, _calibration_watchlist,\n                                     _program_start_from_trace,\n                                     _snapshot_focus_start)\n+\n+\n+@pytest.mark.parametrize('capability,program,expected', [\n+    (True, NO_PROGRAM, 'headless'),\n+    (True, '', 'headless'),\n+    (True, 'usertest', 'shell'),\n+    (False, 'usertest', 'headless'),\n+])\n+def test_driver_uses_workload_mode_not_only_kernel_capability(monkeypatch, tmp_path,\n+                                                             capability, program, expected):\n+    class Reader:\n+        def __init__(self, *args):\n+            pass\n+\n+        def start(self):\n+            pass\n+\n+        def join(self, **kwargs):\n+            pass\n+\n+        def text(self):\n+            return ''\n+\n+    monkeypatch.setattr('nodefusion.host.record._ConsoleReader', Reader)\n+    recorder = Recorder.__new__(Recorder)\n+    recorder.cfg = SimpleNamespace(program=program)\n+    recorder.profile = SimpleNamespace(interactive=capability)\n+    process = SimpleNamespace(stdout=None, stderr=None, poll=lambda: 0)\n+    recorder.sh = SimpleNamespace(popen=lambda cmd: process)\n+    recorder._qemu_cmd = lambda *args: 'qemu'\n+    recorder._drive_headless = lambda *args: 'headless'\n+    recorder._drive_shell = lambda *args: 'shell'\n+    outcome, _, _ = recorder._drive(tmp_path / 'trace.nfb', None, 100,\n+                                    tmp_path / 'console.log', tmp_path / 'qemu.log')\n+    assert outcome == expected\n from nodefusion.host.watchlist import NFTRACE_COMMIT, WatchEntry, WatchList\n \n \n"
      },
      {
        "path": "nodefusion/tests/test_regenerate_artifact.py",
        "sha256": "0098a8fc52b7cd42889036de78ca54cec00064396d701eadd224b3febd3c043b",
        "patch": "diff --git a/nodefusion/tests/test_regenerate_artifact.py b/nodefusion/tests/test_regenerate_artifact.py\nindex 566d3f5..12e6f80 100644\n--- a/nodefusion/tests/test_regenerate_artifact.py\n+++ b/nodefusion/tests/test_regenerate_artifact.py\n@@ -17,6 +17,12 @@ EXPECTED_RUNS = {\n     *{f\"rcore-ch{n}\" for n in range(1, 9)},\n     *{f\"ucore-ch{n}\" for n in range(1, 9)},\n }\n+COURSE_RUNS = {\"rcore-2026A-ch3-observed\", \"ucore-2026A-ch3-batch\",\n+               \"rcore-2026A-ch1-verified\", \"ucore-2026A-ch1-verified\",\n+               \"rcore-2026A-ch2-reference\", \"ucore-2026A-ch2-reference\",\n+               \"ucore-2026A-ch2-stack-fixed\", \"ucore-2026A-ch2-faults\",\n+               \"rcore-2026A-ch4-observed\", \"ucore-2026A-ch4-observed\",\n+               \"ucore-2026A-ch4-pagetable\"}\n \n \n def report_sidecars():\n@@ -43,14 +49,31 @@ def record_from(path):\n \n def test_all_chapter_and_app_artifacts_are_present():\n     entries = report_sidecars()\n-    assert len(entries) == 24\n+    assert len(entries) == len(EXPECTED_RUNS) + len(COURSE_RUNS)\n     runs = {record_from(path)[\"run\"] for path, _ in entries}\n-    assert len(runs) == 24\n+    assert len(runs) == len(entries)\n+    assert COURSE_RUNS <= runs\n     normalized = {name if not name.startswith((\"rcore-\", \"ucore-\"))\n                   else \"-\".join(name.split(\"-\")[:2]) for name in runs}\n     assert EXPECTED_RUNS <= normalized\n \n \n+def test_course_artifacts_keep_commands_source_identity_and_raw_counts():\n+    records = [record for path, _ in report_sidecars()\n+               if (record := json.loads(path.read_text())).get(\"schema\") == \"nodefusion.education-recording/1\"]\n+    assert {record[\"run\"] for record in records} == COURSE_RUNS\n+    for record in records:\n+        assert record[\"schema\"] == \"nodefusion.education-recording/1\"\n+        expected = {\"rcore-2026A-ch1-verified\": \"qemu_exited\",\n+                    \"ucore-2026A-ch2-reference\": \"timeout\"}.get(record[\"run\"], \"completed\")\n+        assert record[\"outcome\"] == expected and record[\"trace_complete\"]\n+        assert len(record[\"source\"][\"kernel_commit\"]) == 40\n+        assert len(record[\"source\"][\"plugin_sha256\"]) == 64\n+        assert \"--watch-all\" in record[\"record_command\"]\n+        assert \"--function-returns\" in record[\"record_command\"]\n+        assert record[\"observations\"][\"raw_events\"] == record[\"report\"][\"event_selection\"][\"raw\"]\n+\n+\n def test_tracecomplete_reuses_its_recording_folder():\n     folder = ARTIFACTS / \"arceos/apps/tracecomplete\"\n     manifest = json.loads((folder / \"manifest.json\").read_text(encoding=\"utf-8\"))\n"
      },
      {
        "path": "nodefusion/tests/test_snapshot.py",
        "sha256": "a1e5383c15e3c3c18222f6e07991712b1f22dfebd3ec67178eb58e4710a921ea",
        "patch": "diff --git a/nodefusion/tests/test_snapshot.py b/nodefusion/tests/test_snapshot.py\nindex f6ee7e9..3f17d86 100644\n--- a/nodefusion/tests/test_snapshot.py\n+++ b/nodefusion/tests/test_snapshot.py\n@@ -235,6 +235,19 @@ def test_liveness_only_skips_on_an_exact_match():\n     assert is_live(E(2149793408), spec)\n \n \n+def test_liveness_supports_declared_state_names_across_kernel_versions():\n+    from nodefusion.model.snapshot import Entity\n+\n+    spec = {\"skip_when\": {\"field\": \"state\", \"one_of\": [\"UNUSED\", \"P_UNUSED\"]}}\n+    for value, live in ((\"UNUSED\", False), (\"P_UNUSED\", False),\n+                        (\"RUNNABLE\", True), (\"P_RUNNING\", True), (0, True)):\n+        entity = Entity(\"process\", 0, fields={\"state\": Field(\"state\", PRESENT, value)})\n+        assert is_live(entity, spec) is live\n+    for state in (ABSENT, EMPTY, UNDECODABLE):\n+        entity = Entity(\"process\", 0, fields={\"state\": Field(\"state\", state)})\n+        assert is_live(entity, spec)\n+\n+\n @needs_elf\n def test_entity_count_comes_from_dwarf_not_a_constant(xv6):\n     dw, m, res, syms = xv6\n"
      },
      {
        "path": "nodefusion/tests/test_units.py",
        "sha256": "9bf99f5d3080ed458a97e736e30b84025eb99c1e43e693d9aa33f519896106b3",
        "patch": "diff --git a/nodefusion/tests/test_units.py b/nodefusion/tests/test_units.py\nindex f10392d..8d86a2d 100644\n--- a/nodefusion/tests/test_units.py\n+++ b/nodefusion/tests/test_units.py\n@@ -40,6 +40,49 @@ def test_rcore_booted_needs_the_kernel_marker(console, booted):\n     assert K.by_kind('rcore').booted(console) is booted\n \n \n+@pytest.mark.parametrize(\"marker\", [\"ALL DONE\", \"all app are over!\", \"all apps over\"])\n+def test_ucore_batch_completion(marker):\n+    assert K.by_kind('ucore').classify(f\"[PANIC 5] os/loader.c:14: {marker}\\n\") == 'completed'\n+\n+\n+@pytest.mark.parametrize(\"console, booted\", [\n+    (\"\\x1b[34m[INFO 0]start scheduler!\\x1b[0m\\n\", True),\n+    (\"C user shell\\n>> \", True),\n+    (\"OpenSBI v1.7\\n\", False),\n+])\n+def test_ucore_shell_and_scheduler_boot_markers(console, booted):\n+    assert K.by_kind('ucore').booted(console) is booted\n+\n+\n+def test_ucore_batch_without_completion_is_not_complete():\n+    assert K.by_kind('ucore').classify(\"start scheduler!\\nTest write A OK!\\n\") == 'qemu_exited'\n+\n+\n+@pytest.mark.parametrize('diagnostic', ['IllegalInstruction in application, core dumped.',\n+                                      '[PANIC 0] user assertion failed'])\n+def test_ucore_user_diagnostics_are_not_kernel_stop_markers(diagnostic):\n+    profile = K.by_kind('ucore')\n+    assert profile.booted('hello wrold!\\n')\n+    assert profile.classify(diagnostic) == 'qemu_exited'\n+    assert profile.classify(diagnostic + '\\nALL DONE\\n') == 'completed'\n+\n+\n+def test_ucore_headless_keeps_recording_after_user_fault(monkeypatch):\n+    from types import SimpleNamespace\n+    from nodefusion.host.record import Recorder\n+\n+    reader = SimpleNamespace(eof=False)\n+    consoles = iter(['hello wrold!\\nIllegalInstruction in application, core dumped.\\n',\n+                     'hello wrold!\\nIllegalInstruction in application, core dumped.\\nALL DONE\\n'])\n+    reader.text = lambda: next(consoles)\n+    monkeypatch.setattr('nodefusion.host.record.time.sleep', lambda seconds: None)\n+    recorder = Recorder.__new__(Recorder)\n+    recorder.cfg = SimpleNamespace(timeout=10, boot_timeout=5)\n+    recorder.profile = K.by_kind('ucore')\n+    process = SimpleNamespace(poll=lambda: None)\n+    assert recorder._drive_headless(process, reader) == 'completed'\n+\n+\n # ----------------------------------------------------------------- xv6 classify\n \n def test_xv6_panic():\n"
      }
    ],
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      {
        "argv": [
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          "apply",
          "--check",
          "/home/joseph/nf/education-2026A-20260927/rcore-2026a-ch6-observation.patch"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-rcore-2026a-ch6-observation.patch-check.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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      {
        "argv": [
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          "/home/joseph/nf/education-2026A-20260927/rcore-2026a-ch6-observation.patch"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-rcore-2026a-ch6-observation.patch-apply.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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      {
        "argv": [
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          "os/src/nftrace.rs"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-intent-to-add.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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      {
        "argv": [
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          "clone",
          "--no-hardlinks",
          "--no-checkout",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6/user",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/user"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-user-clone.log",
        "returncode": 0,
        "log_sha256": "73098d34c389fbae2ec0ef78dd06ac72cbbb62fdf57e17bc2912ffac021d225f"
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      {
        "argv": [
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          "checkout",
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          "a0593662ad55d670ba8c27ce1763347cd0dd552f"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/user",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-user-checkout.log",
        "returncode": 0,
        "log_sha256": "47a4b17bdb8440868b9d8ec457957027de163359737687450d3ffbb5c24bad56"
      },
      {
        "argv": [
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          "-a",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6/user/build",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/user/build"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-copy-user-build.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
      },
      {
        "argv": [
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          "/home/joseph/nf/education-2026A-20260927/rcore-ch6/os/Cargo.lock",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os/Cargo.lock"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-copy-lock.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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      {
        "argv": [
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          "--locked"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os",
        "environment": {
          "LOG": "TRACE",
          "CARGO_NET_GIT_FETCH_WITH_CLI": "true",
          "CARGO_PROFILE_RELEASE_DEBUG": "2"
        },
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-kernel-build.log",
        "returncode": 0,
        "log_sha256": "23bd53499149c7ee43f10ea2b48e3c54164b7f4c9672c14c452214d18e7f9f05"
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      {
        "argv": [
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          "--binary-architecture=riscv64",
          "--strip-all",
          "-O",
          "binary",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os/target/riscv64gc-unknown-none-elf/release/os",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os/target/riscv64gc-unknown-none-elf/release/os.bin"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-objcopy.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
      },
      {
        "argv": [
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          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-original.img",
          "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/user/target/riscv64gc-unknown-none-elf/release/fs.img"
        ],
        "cwd": "/home/joseph/nf/education-2026A-20260927",
        "environment": {},
        "log": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-copy-initial-image.log",
        "returncode": 0,
        "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
      }
    ],
    "patches": [
      {
        "path": "/home/joseph/nf/education-2026A-20260927/rcore-2026a-ch6-observation.patch",
        "sha256": "d1e5f53312d92d371f56d5e4c7d4e35ad8cd446f288023cbba2546e54aa8149d"
      }
    ],
    "kernel_binary_sha256": "fd8e2ba7991190c7d2b95dbe308bb9cfd71f15ef4301556ae1b431b122d8fb99",
    "cargo_locks": {
      "os/Cargo.lock": "a51d6eeff0a223026dd991bdb24466d1578d2b251f7015dfe8ce107abe7a48c6"
    },
    "kernel_elf": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed/os/target/riscv64gc-unknown-none-elf/release/os",
    "kernel_elf_sha256": "9871e0f49053b03b48ad47d4ce35972e6f8a340f09f614c4450c2cbd090f43db",
    "kernel_patch": "diff --git a/easy-fs/src/vfs.rs b/easy-fs/src/vfs.rs\nindex a3b5544..40676ba 100644\n--- a/easy-fs/src/vfs.rs\n+++ b/easy-fs/src/vfs.rs\n@@ -78,6 +78,7 @@ impl Inode {\n         self.read_disk_inode(|disk_inode| (inode_id, disk_inode.nlink, disk_inode.is_dir()))\n     }\n     /// Find inode under a disk inode by name\n+    #[inline(never)]\n     fn find_inode_id(&self, name: &str, disk_inode: &DiskInode) -> Option<u32> {\n         self.find_dirent(name, disk_inode)\n             .map(|(_, inode_id)| inode_id)\ndiff --git a/os/src/main.rs b/os/src/main.rs\nindex d92a58e..363da49 100644\n--- a/os/src/main.rs\n+++ b/os/src/main.rs\n@@ -40,6 +40,7 @@ pub mod fs;\n pub mod lang_items;\n pub mod logging;\n pub mod mm;\n+mod nftrace;\n pub mod sbi;\n pub mod sync;\n pub mod syscall;\ndiff --git a/os/src/mm/frame_allocator.rs b/os/src/mm/frame_allocator.rs\nindex 44f20cd..63dc934 100644\n--- a/os/src/mm/frame_allocator.rs\n+++ b/os/src/mm/frame_allocator.rs\n@@ -47,6 +47,7 @@ pub struct StackFrameAllocator {\n     current: usize,\n     end: usize,\n     recycled: Vec<usize>,\n+    allocated: usize,\n }\n \n impl StackFrameAllocator {\n@@ -62,17 +63,22 @@ impl FrameAllocator for StackFrameAllocator {\n             current: 0,\n             end: 0,\n             recycled: Vec::new(),\n+            allocated: 0,\n         }\n     }\n     fn alloc(&mut self) -> Option<PhysPageNum> {\n-        if let Some(ppn) = self.recycled.pop() {\n+        let result = if let Some(ppn) = self.recycled.pop() {\n             Some(ppn.into())\n         } else if self.current == self.end {\n             None\n         } else {\n             self.current += 1;\n             Some((self.current - 1).into())\n+        };\n+        if result.is_some() {\n+            self.allocated += 1;\n         }\n+        result\n     }\n     fn dealloc(&mut self, ppn: PhysPageNum) {\n         let ppn = ppn.0;\n@@ -82,6 +88,13 @@ impl FrameAllocator for StackFrameAllocator {\n         }\n         // recycle\n         self.recycled.push(ppn);\n+        self.allocated -= 1;\n+    }\n+}\n+\n+impl StackFrameAllocator {\n+    fn page_counts(&self) -> (usize, usize) {\n+        (self.end - self.current + self.recycled.len(), self.allocated)\n     }\n }\n \n@@ -101,19 +114,34 @@ pub fn init_frame_allocator() {\n         PhysAddr::from(ekernel as usize).ceil(),\n         PhysAddr::from(MEMORY_END).floor(),\n     );\n+    let (free, used) = FRAME_ALLOCATOR.exclusive_access().page_counts();\n+    crate::nftrace::allocator_state(free, used);\n }\n \n /// Allocate a physical page frame in FrameTracker style\n+#[inline(never)]\n pub fn frame_alloc() -> Option<FrameTracker> {\n-    FRAME_ALLOCATOR\n-        .exclusive_access()\n-        .alloc()\n-        .map(FrameTracker::new)\n+    let (ppn, free, used) = {\n+        let mut allocator = FRAME_ALLOCATOR.exclusive_access();\n+        let ppn = allocator.alloc();\n+        let (free, used) = allocator.page_counts();\n+        (ppn, free, used)\n+    };\n+    let frame = ppn.map(FrameTracker::new);\n+    let pa = frame.as_ref().map_or(0, |frame| PhysAddr::from(frame.ppn).0);\n+    crate::nftrace::page_alloc(pa, free, used);\n+    frame\n }\n \n /// Deallocate a physical page frame with a given ppn\n+#[inline(never)]\n pub fn frame_dealloc(ppn: PhysPageNum) {\n-    FRAME_ALLOCATOR.exclusive_access().dealloc(ppn);\n+    let (free, used) = {\n+        let mut allocator = FRAME_ALLOCATOR.exclusive_access();\n+        allocator.dealloc(ppn);\n+        allocator.page_counts()\n+    };\n+    crate::nftrace::page_free(PhysAddr::from(ppn).0, free, used);\n }\n \n #[allow(unused)]\ndiff --git a/os/src/mm/heap_allocator.rs b/os/src/mm/heap_allocator.rs\nindex e5f8b30..e39a7cc 100644\n--- a/os/src/mm/heap_allocator.rs\n+++ b/os/src/mm/heap_allocator.rs\n@@ -1,10 +1,44 @@\n //! The global allocator\n use crate::config::KERNEL_HEAP_SIZE;\n use buddy_system_allocator::LockedHeap;\n+use core::alloc::{GlobalAlloc, Layout};\n+use core::ops::Deref;\n+\n+struct ObservedHeap(LockedHeap);\n+\n+impl Deref for ObservedHeap {\n+    type Target = LockedHeap;\n+\n+    fn deref(&self) -> &Self::Target {\n+        &self.0\n+    }\n+}\n+\n+unsafe impl GlobalAlloc for ObservedHeap {\n+    #[inline(never)]\n+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {\n+        GlobalAlloc::alloc(&self.0, layout)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {\n+        GlobalAlloc::dealloc(&self.0, ptr, layout)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {\n+        GlobalAlloc::realloc(&self.0, ptr, layout, new_size)\n+    }\n+\n+    #[inline(never)]\n+    unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {\n+        GlobalAlloc::alloc_zeroed(&self.0, layout)\n+    }\n+}\n \n #[global_allocator]\n /// heap allocator instance\n-static HEAP_ALLOCATOR: LockedHeap = LockedHeap::empty();\n+static HEAP_ALLOCATOR: ObservedHeap = ObservedHeap(LockedHeap::empty());\n \n #[alloc_error_handler]\n /// panic when heap allocation error occurs\ndiff --git a/os/src/mm/memory_set.rs b/os/src/mm/memory_set.rs\nindex 72d2571..d358a04 100644\n--- a/os/src/mm/memory_set.rs\n+++ b/os/src/mm/memory_set.rs\n@@ -42,6 +42,12 @@ pub struct MemorySet {\n     areas: Vec<MapArea>,\n }\n \n+#[inline(never)]\n+/// Observe a range whose page-table entries are about to be removed.\n+pub fn nodefusion_vm_unmap_region(start_vpn: usize, end_vpn: usize) {\n+    core::hint::black_box((start_vpn, end_vpn));\n+}\n+\n impl MemorySet {\n     /// Create a new empty `MemorySet`.\n     pub fn new_bare() -> Self {\n@@ -96,6 +102,9 @@ impl MemorySet {\n         }\n         if mapped_end != area.vpn_range.get_end() {\n             // Remove successful mappings before dropping the area's data frames.\n+            if mapped_end > area.vpn_range.get_start() {\n+                nodefusion_vm_unmap_region(area.vpn_range.get_start().0, mapped_end.0);\n+            }\n             for vpn in VPNRange::new(area.vpn_range.get_start(), mapped_end) {\n                 self.page_table.unmap(vpn);\n             }\n@@ -121,6 +130,7 @@ impl MemorySet {\n         Some(())\n     }\n     /// remove a area\n+    #[inline(never)]\n     pub fn remove_area_with_start_vpn(&mut self, start_vpn: VirtPageNum) {\n         if let Some((idx, area)) = self\n             .areas\n@@ -135,6 +145,7 @@ impl MemorySet {\n     /// Add a new MapArea into this MemorySet.\n     /// Assuming that there are no conflicts in the virtual address\n     /// space.\n+    #[inline(never)]\n     fn push(&mut self, mut map_area: MapArea, data: Option<&[u8]>) {\n         map_area.map(&mut self.page_table);\n         if let Some(data) = data {\n@@ -434,12 +445,18 @@ impl MapArea {\n         }\n     }\n     pub fn unmap(&mut self, page_table: &mut PageTable) {\n+        if self.vpn_range.get_start() < self.vpn_range.get_end() {\n+            nodefusion_vm_unmap_region(self.vpn_range.get_start().0, self.vpn_range.get_end().0);\n+        }\n         for vpn in self.vpn_range {\n             self.unmap_one(page_table, vpn);\n         }\n     }\n     #[allow(unused)]\n     pub fn shrink_to(&mut self, page_table: &mut PageTable, new_end: VirtPageNum) {\n+        if new_end < self.vpn_range.get_end() {\n+            nodefusion_vm_unmap_region(new_end.0, self.vpn_range.get_end().0);\n+        }\n         for vpn in VPNRange::new(new_end, self.vpn_range.get_end()) {\n             self.unmap_one(page_table, vpn)\n         }\ndiff --git a/os/src/mm/page_table.rs b/os/src/mm/page_table.rs\nindex 3d84f61..8a62ec9 100644\n--- a/os/src/mm/page_table.rs\n+++ b/os/src/mm/page_table.rs\n@@ -81,6 +81,7 @@ pub struct PageTable {\n /// Assume that it won't oom when creating/mapping.\n impl PageTable {\n     /// Create a new page table\n+    #[inline(never)]\n     pub fn new() -> Self {\n         let frame = frame_alloc().unwrap();\n         PageTable {\n@@ -134,6 +135,7 @@ impl PageTable {\n         result\n     }\n     /// Map a page, returning failure for conflicts or exhausted page table frames.\n+    #[inline(never)]\n     pub fn map(&mut self, vpn: VirtPageNum, ppn: PhysPageNum, flags: PTEFlags) -> Option<()> {\n         let pte = self.find_pte_create(vpn)?;\n         if pte.is_valid() {\ndiff --git a/os/src/nftrace.rs b/os/src/nftrace.rs\nnew file mode 100644\nindex 0000000..933bb39\n--- /dev/null\n+++ b/os/src/nftrace.rs\n@@ -0,0 +1,44 @@\n+//! Stack-backed observation records for the QEMU plugin.\n+\n+pub(crate) const NO_TASK: usize = usize::MAX;\n+\n+#[repr(C)]\n+struct Record {\n+    kind: u64,\n+    args: [u64; 4],\n+}\n+\n+#[no_mangle]\n+#[inline(never)]\n+/// Read an observation record while its stack storage is live.\n+pub extern \"C\" fn nftrace_commit_point(record: *const u64) {\n+    if !record.is_null() {\n+        // The caller keeps this stack record alive until return.\n+        core::hint::black_box(unsafe { core::ptr::read_volatile(record) });\n+    }\n+}\n+\n+fn emit(kind: u64, args: [u64; 4]) {\n+    let record = Record { kind, args };\n+    nftrace_commit_point(&record as *const Record as *const u64);\n+}\n+\n+pub(crate) fn page_alloc(pa: usize, free: usize, used: usize) {\n+    emit(1, [pa as u64, 1, free as u64, used as u64]);\n+}\n+\n+pub(crate) fn page_free(pa: usize, free: usize, used: usize) {\n+    emit(5, [pa as u64, 1, free as u64, used as u64]);\n+}\n+\n+pub(crate) fn allocator_state(free: usize, used: usize) {\n+    emit(6, [free as u64, used as u64, 0, 0]);\n+}\n+\n+pub(crate) fn process_fork(parent: usize, child: usize) {\n+    emit(2, [parent as u64, child as u64, 0, 0]);\n+}\n+\n+pub(crate) fn sched_switch(from_task: usize, to_task: usize, from_pid: usize, to_pid: usize) {\n+    emit(4, [from_task as u64, to_task as u64, from_pid as u64, to_pid as u64]);\n+}\ndiff --git a/os/src/syscall/process.rs b/os/src/syscall/process.rs\nindex 2db82e9..fab4e6b 100644\n--- a/os/src/syscall/process.rs\n+++ b/os/src/syscall/process.rs\n@@ -53,6 +53,7 @@ pub fn sys_fork() -> isize {\n     trap_cx.x[10] = 0;\n     // add new task to scheduler\n     add_task(new_task);\n+    crate::nftrace::process_fork(current_task.getpid(), new_pid);\n     new_pid as isize\n }\n \ndiff --git a/os/src/task/id.rs b/os/src/task/id.rs\nindex 5a67d4a..534c4b7 100644\n--- a/os/src/task/id.rs\n+++ b/os/src/task/id.rs\n@@ -51,6 +51,7 @@ lazy_static! {\n pub struct PidHandle(pub usize);\n \n impl Drop for PidHandle {\n+    #[inline(never)]\n     fn drop(&mut self) {\n         //println!(\"drop pid {}\", self.0);\n         PID_ALLOCATOR.exclusive_access().dealloc(self.0);\n@@ -85,6 +86,7 @@ pub fn kstack_alloc() -> KernelStack {\n }\n \n impl Drop for KernelStack {\n+    #[inline(never)]\n     fn drop(&mut self) {\n         let (kernel_stack_bottom, _) = kernel_stack_position(self.0);\n         let kernel_stack_bottom_va: VirtAddr = kernel_stack_bottom.into();\ndiff --git a/os/src/task/mod.rs b/os/src/task/mod.rs\nindex 60e8ea0..7b3be0e 100644\n--- a/os/src/task/mod.rs\n+++ b/os/src/task/mod.rs\n@@ -37,10 +37,14 @@ pub use processor::{\n     Processor,\n };\n /// Suspend the current 'Running' task and run the next task in task list.\n+#[inline(never)]\n pub fn suspend_current_and_run_next() {\n     // There must be an application running.\n     let task = take_current_task().unwrap();\n \n+    let task_id = Arc::as_ptr(&task) as usize;\n+    let pid = task.getpid();\n+\n     // ---- access current TCB exclusively\n     let mut task_inner = task.inner_exclusive_access();\n     let task_cx_ptr = &mut task_inner.task_cx as *mut TaskContext;\n@@ -52,6 +56,7 @@ pub fn suspend_current_and_run_next() {\n     // push back to ready queue.\n     add_task(task);\n     // jump to scheduling cycle\n+    processor::trace_to_idle(task_id, pid);\n     schedule(task_cx_ptr);\n }\n \n@@ -64,6 +69,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {\n     let task = take_current_task().unwrap();\n \n     let pid = task.getpid();\n+    let task_id = Arc::as_ptr(&task) as usize;\n     if pid == IDLE_PID {\n         println!(\n             \"[kernel] Idle process exit with exit_code {} ...\",\n@@ -101,6 +107,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {\n     drop(task);\n     // we do not have to save task context\n     let mut _unused = TaskContext::zero_init();\n+    processor::trace_to_idle(task_id, pid);\n     schedule(&mut _unused as *mut _);\n }\n \ndiff --git a/os/src/task/processor.rs b/os/src/task/processor.rs\nindex f05fa09..5891e27 100644\n--- a/os/src/task/processor.rs\n+++ b/os/src/task/processor.rs\n@@ -61,12 +61,15 @@ pub fn run_tasks() {\n             let mut task_inner = task.inner_exclusive_access();\n             let next_task_cx_ptr = &task_inner.task_cx as *const TaskContext;\n             task_inner.task_status = TaskStatus::Running;\n+            let next_task_id = Arc::as_ptr(&task) as usize;\n+            let next_pid = task.getpid();\n             // release coming task_inner manually\n             drop(task_inner);\n             // release coming task TCB manually\n             processor.current = Some(task);\n             // release processor manually\n             drop(processor);\n+            crate::nftrace::sched_switch(idle_task_cx_ptr as usize, next_task_id, crate::nftrace::NO_TASK, next_pid);\n             unsafe {\n                 __switch(idle_task_cx_ptr, next_task_cx_ptr);\n             }\n@@ -86,6 +89,11 @@ pub fn current_task() -> Option<Arc<TaskControlBlock>> {\n     PROCESSOR.exclusive_access().current()\n }\n \n+pub(super) fn trace_to_idle(task_id: usize, pid: usize) {\n+    let idle = PROCESSOR.exclusive_access().get_idle_task_cx_ptr() as usize;\n+    crate::nftrace::sched_switch(task_id, idle, pid, crate::nftrace::NO_TASK);\n+}\n+\n /// Get the current user token(addr of page table)\n pub fn current_user_token() -> usize {\n     let task = current_task().unwrap();\n",
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          "-kernel",
          "os/target/riscv64gc-unknown-none-elf/release/os.bin",
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          "file=/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-ch6_usertest-course.img,if=none,format=raw,id=x0",
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        "cwd": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed",
        "stdin_preload": "\nch6_usertest\n",
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        "console": "/home/joseph/nf/education-2026A-20260927/rcore-ch6-observed-ch6_usertest-course.log",
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          "ch4_mmap1",
          "ch4_mmap2",
          "ch4_mmap3",
          "ch4_unmap",
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          "ch5b_exit",
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          "ch5b_forktest",
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          "ch5_spawn1",
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          "ch3b_yield0": 0,
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          "ch5b_forktest2": 0,
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          "ch6_file0": 0,
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          "ch6_file3": 0
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          "ch2b_power_5",
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        "func._ZN14virtio_drivers6header12VirtIOHeader20read_device_features17hefc0f27940cdd1c5E": 1,
        "func._ZN14virtio_drivers6header12VirtIOHeader21write_driver_features17hcc4876566dfc1ed3E": 1,
        "func._ZN14virtio_drivers6header12VirtIOHeader6notify17hdbf2aa8e4d952112E": 538,
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        "func._ZN169_$LT$$LT$alloc..collections..vec_deque..drain..Drain$LT$T$C$A$GT$$u20$as$u20$core..ops..drop..Drop$GT$..drop..DropGuard$LT$T$C$A$GT$$u20$as$u20$core..ops..drop..Drop$GT$4drop27join_head_and_tail_wrapping17h9d647c6c3df0dc98E": 328,
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        "func._ZN17compiler_builtins3mem6memcpy17ha62f30a1264ab51cE": 3196,
        "func._ZN17compiler_builtins3mem6memset17hb3cc3e7988f20252E": 1552,
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        "func._ZN22buddy_system_allocator4Heap4init17h47bfef144f322583E": 1,
        "func._ZN22buddy_system_allocator4Heap5alloc17hb52723857453e8d6E": 1528,
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        "func._ZN2os4task9processor18current_user_token17hf21c06b3d8255b1dE": 766,
        "func._ZN2os7console5print17h583c22a6d32e9e8cE": 1,
        "func._ZN2os7logging4init17h63c521900ec8c898E": 1,
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        "func._ZN44_$LT$$RF$T$u20$as$u20$core..fmt..Display$GT$3fmt17h4add10e2c36f1026E": 200,
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        "func._ZN8xmas_elf7ElfFile3new17h20f397223943fbdaE": 16,
        "func._ZN8xmas_elf7program13ProgramHeader8get_type17h5cbcce3512fdef57E": 74,
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