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FD kernel tracing: Capture kernel-only stack traces

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* When exec()'ing we'd otherwise get (harmless but annoying) messages
  from vm_page_fault(). With syscall tracing enabled we can get userland
  stack traces anyway.
* Simplify by using TRACE_ENTRY_SELECTOR().
This commit is contained in:
Ingo Weinhold 2013-12-07 15:43:07 +01:00
parent 0a4cbd786c
commit 00b42dde0d
1 changed files with 3 additions and 15 deletions
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18
src/system/kernel/fs/vfs_tracing.h
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@ -20,32 +20,20 @@
namespace FileDescriptorTracing { namespace FileDescriptorTracing {
class FDTraceEntry : public AbstractTraceEntry { class FDTraceEntry
: public TRACE_ENTRY_SELECTOR(FILE_DESCRIPTOR_TRACING_STACK_TRACE) {
public: public:
FDTraceEntry(file_descriptor* descriptor) FDTraceEntry(file_descriptor* descriptor)
: :
TraceEntryBase(FILE_DESCRIPTOR_TRACING_STACK_TRACE, 0, true),
fDescriptor(descriptor), fDescriptor(descriptor),
fReferenceCount(descriptor->ref_count) fReferenceCount(descriptor->ref_count)
{ {
#if FILE_DESCRIPTOR_TRACING_STACK_TRACE
fStackTrace = capture_tracing_stack_trace(
FILE_DESCRIPTOR_TRACING_STACK_TRACE, 0, false);
#endif
} }
#if FILE_DESCRIPTOR_TRACING_STACK_TRACE
virtual void DumpStackTrace(TraceOutput& out)
{
out.PrintStackTrace(fStackTrace);
}
#endif
protected: protected:
file_descriptor* fDescriptor; file_descriptor* fDescriptor;
int32 fReferenceCount; int32 fReferenceCount;
#if FILE_DESCRIPTOR_TRACING_STACK_TRACE
tracing_stack_trace* fStackTrace;
#endif
}; };