Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
kcsan: Enable context analysis
Enable context analysis for the KCSAN subsystem.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251219154418.3592607-31-elver@google.com
authored by
Marco Elver
and committed by
Peter Zijlstra
0eaa911f
6556fde2
+10
-3
+2
kernel/kcsan/Makefile
+2
kernel/kcsan/Makefile
+8
-3
kernel/kcsan/report.c
+8
-3
kernel/kcsan/report.c
···
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* been reported since (now - KCSAN_REPORT_ONCE_IN_MS).
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*/
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static bool rate_limit_report(unsigned long frame1, unsigned long frame2)
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+
__must_hold(&report_lock)
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{
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struct report_time *use_entry = &report_times[0];
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unsigned long invalid_before;
···
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static void
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print_stack_trace(unsigned long stack_entries[], int num_entries, unsigned long reordered_to)
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__must_hold(&report_lock)
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{
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stack_trace_print(stack_entries, num_entries, 0);
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if (reordered_to)
···
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}
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static void print_verbose_info(struct task_struct *task)
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__must_hold(&report_lock)
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{
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if (!task)
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return;
···
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const struct access_info *ai,
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struct other_info *other_info,
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u64 old, u64 new, u64 mask)
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__must_hold(&report_lock)
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{
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unsigned long reordered_to = 0;
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unsigned long stack_entries[NUM_STACK_ENTRIES] = { 0 };
···
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}
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static void release_report(unsigned long *flags, struct other_info *other_info)
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__releases(&report_lock)
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{
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/*
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* Use size to denote valid/invalid, since KCSAN entirely ignores
···
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/*
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* Sets @other_info->task and awaits consumption of @other_info.
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-
*
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* Precondition: report_lock is held.
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* Postcondition: report_lock is held.
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*/
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static void set_other_info_task_blocking(unsigned long *flags,
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const struct access_info *ai,
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struct other_info *other_info)
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__must_hold(&report_lock)
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{
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/*
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* We may be instrumenting a code-path where current->state is already
···
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static void prepare_report_producer(unsigned long *flags,
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const struct access_info *ai,
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struct other_info *other_info)
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__must_not_hold(&report_lock)
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{
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raw_spin_lock_irqsave(&report_lock, *flags);
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···
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static bool prepare_report_consumer(unsigned long *flags,
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const struct access_info *ai,
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struct other_info *other_info)
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__cond_acquires(true, &report_lock)
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{
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raw_spin_lock_irqsave(&report_lock, *flags);