sanitizer_stacktrace.h [plain text]
#ifndef SANITIZER_STACKTRACE_H
#define SANITIZER_STACKTRACE_H
#include "sanitizer_internal_defs.h"
namespace __sanitizer {
static const uptr kStackTraceMax = 256;
#if SANITIZER_LINUX && (defined(__aarch64__) || defined(__powerpc__) || \
defined(__powerpc64__) || defined(__sparc__) || \
defined(__mips__))
# define SANITIZER_CAN_FAST_UNWIND 0
#elif SANITIZER_WINDOWS
# define SANITIZER_CAN_FAST_UNWIND 0
#else
# define SANITIZER_CAN_FAST_UNWIND 1
#endif
struct StackTrace {
const uptr *trace;
uptr size;
StackTrace(const uptr *trace, uptr size) : trace(trace), size(size) {}
void Print() const;
static bool WillUseFastUnwind(bool request_fast_unwind) {
if (!SANITIZER_CAN_FAST_UNWIND)
return false;
else if (SANITIZER_MAC != 0 || SANITIZER_FREEBSD != 0)
return true;
return request_fast_unwind;
}
static uptr GetCurrentPc();
static uptr GetPreviousInstructionPc(uptr pc);
typedef bool (*SymbolizeCallback)(const void *pc, char *out_buffer,
int out_size);
};
struct BufferedStackTrace : public StackTrace {
uptr trace_buffer[kStackTraceMax];
uptr top_frame_bp;
BufferedStackTrace() : StackTrace(trace_buffer, 0), top_frame_bp(0) {}
void Unwind(uptr max_depth, uptr pc, uptr bp, void *context, uptr stack_top,
uptr stack_bottom, bool request_fast_unwind);
private:
void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom,
uptr max_depth);
void SlowUnwindStack(uptr pc, uptr max_depth);
void SlowUnwindStackWithContext(uptr pc, void *context,
uptr max_depth);
void PopStackFrames(uptr count);
uptr LocatePcInTrace(uptr pc);
};
}
#define GET_CALLER_PC_BP_SP \
uptr bp = GET_CURRENT_FRAME(); \
uptr pc = GET_CALLER_PC(); \
uptr local_stack; \
uptr sp = (uptr)&local_stack
#define GET_CALLER_PC_BP \
uptr bp = GET_CURRENT_FRAME(); \
uptr pc = GET_CALLER_PC();
#define GET_CURRENT_PC_BP_SP \
uptr bp = GET_CURRENT_FRAME(); \
uptr pc = StackTrace::GetCurrentPc(); \
uptr local_stack; \
uptr sp = (uptr)&local_stack
#endif // SANITIZER_STACKTRACE_H