103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
//===-- sanitizer_stacktrace.h ----------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_STACKTRACE_H
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#define SANITIZER_STACKTRACE_H
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#include "sanitizer_internal_defs.h"
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namespace __sanitizer {
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static const uptr kStackTraceMax = 256;
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#if SANITIZER_LINUX && (defined(__aarch64__) || defined(__powerpc__) || \
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defined(__powerpc64__) || defined(__sparc__) || \
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defined(__mips__))
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# define SANITIZER_CAN_FAST_UNWIND 0
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#elif SANITIZER_WINDOWS
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# define SANITIZER_CAN_FAST_UNWIND 0
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#else
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# define SANITIZER_CAN_FAST_UNWIND 1
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#endif
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struct StackTrace {
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typedef bool (*SymbolizeCallback)(const void *pc, char *out_buffer,
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int out_size);
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uptr top_frame_bp;
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uptr size;
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uptr trace[kStackTraceMax];
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// Prints a symbolized stacktrace, followed by an empty line.
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static void PrintStack(const uptr *addr, uptr size);
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void Print() const {
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PrintStack(trace, size);
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}
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void CopyFrom(const uptr *src, uptr src_size) {
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top_frame_bp = 0;
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size = src_size;
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if (size > kStackTraceMax) size = kStackTraceMax;
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for (uptr i = 0; i < size; i++)
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trace[i] = src[i];
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}
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static bool WillUseFastUnwind(bool request_fast_unwind) {
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// Check if fast unwind is available. Fast unwind is the only option on Mac.
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// It is also the only option on FreeBSD as the slow unwinding that
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// leverages _Unwind_Backtrace() yields the call stack of the signal's
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// handler and not of the code that raised the signal (as it does on Linux).
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if (!SANITIZER_CAN_FAST_UNWIND)
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return false;
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else if (SANITIZER_MAC != 0 || SANITIZER_FREEBSD != 0)
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return true;
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return request_fast_unwind;
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}
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void Unwind(uptr max_depth, uptr pc, uptr bp, void *context, uptr stack_top,
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uptr stack_bottom, bool request_fast_unwind);
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static uptr GetCurrentPc();
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static uptr GetPreviousInstructionPc(uptr pc);
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private:
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void FastUnwindStack(uptr pc, uptr bp, uptr stack_top, uptr stack_bottom,
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uptr max_depth);
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void SlowUnwindStack(uptr pc, uptr max_depth);
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void SlowUnwindStackWithContext(uptr pc, void *context,
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uptr max_depth);
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void PopStackFrames(uptr count);
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uptr LocatePcInTrace(uptr pc);
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};
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} // namespace __sanitizer
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// Use this macro if you want to print stack trace with the caller
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// of the current function in the top frame.
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#define GET_CALLER_PC_BP_SP \
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uptr bp = GET_CURRENT_FRAME(); \
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uptr pc = GET_CALLER_PC(); \
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uptr local_stack; \
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uptr sp = (uptr)&local_stack
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#define GET_CALLER_PC_BP \
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uptr bp = GET_CURRENT_FRAME(); \
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uptr pc = GET_CALLER_PC();
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// Use this macro if you want to print stack trace with the current
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// function in the top frame.
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#define GET_CURRENT_PC_BP_SP \
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uptr bp = GET_CURRENT_FRAME(); \
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uptr pc = StackTrace::GetCurrentPc(); \
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uptr local_stack; \
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uptr sp = (uptr)&local_stack
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#endif // SANITIZER_STACKTRACE_H
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