79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===-- sanitizer_stacktrace_libcdep.cc -----------------------------------===//
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is shared between AddressSanitizer and ThreadSanitizer
|
|
// run-time libraries.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "sanitizer_common.h"
|
|
#include "sanitizer_placement_new.h"
|
|
#include "sanitizer_stacktrace.h"
|
|
#include "sanitizer_stacktrace_printer.h"
|
|
#include "sanitizer_symbolizer.h"
|
|
|
|
namespace __sanitizer {
|
|
|
|
void StackTrace::Print() const {
|
|
if (trace == nullptr || size == 0) {
|
|
Printf(" <empty stack>\n\n");
|
|
return;
|
|
}
|
|
const int kMaxAddrFrames = 64;
|
|
InternalScopedBuffer<AddressInfo> addr_frames(kMaxAddrFrames);
|
|
for (uptr i = 0; i < kMaxAddrFrames; i++)
|
|
new(&addr_frames[i]) AddressInfo();
|
|
InternalScopedString frame_desc(GetPageSizeCached() * 2);
|
|
uptr frame_num = 0;
|
|
for (uptr i = 0; i < size && trace[i]; i++) {
|
|
// PCs in stack traces are actually the return addresses, that is,
|
|
// addresses of the next instructions after the call.
|
|
uptr pc = GetPreviousInstructionPc(trace[i]);
|
|
uptr addr_frames_num = Symbolizer::GetOrInit()->SymbolizePC(
|
|
pc, addr_frames.data(), kMaxAddrFrames);
|
|
if (addr_frames_num == 0) {
|
|
addr_frames[0].address = pc;
|
|
addr_frames_num = 1;
|
|
}
|
|
for (uptr j = 0; j < addr_frames_num; j++) {
|
|
AddressInfo &info = addr_frames[j];
|
|
frame_desc.clear();
|
|
RenderFrame(&frame_desc, common_flags()->stack_trace_format, frame_num++,
|
|
info, common_flags()->strip_path_prefix);
|
|
Printf("%s\n", frame_desc.data());
|
|
info.Clear();
|
|
}
|
|
}
|
|
// Always print a trailing empty line after stack trace.
|
|
Printf("\n");
|
|
}
|
|
|
|
void BufferedStackTrace::Unwind(uptr max_depth, uptr pc, uptr bp, void *context,
|
|
uptr stack_top, uptr stack_bottom,
|
|
bool request_fast_unwind) {
|
|
top_frame_bp = (max_depth > 0) ? bp : 0;
|
|
// Avoid doing any work for small max_depth.
|
|
if (max_depth == 0) {
|
|
size = 0;
|
|
return;
|
|
}
|
|
if (max_depth == 1) {
|
|
size = 1;
|
|
trace_buffer[0] = pc;
|
|
return;
|
|
}
|
|
if (!WillUseFastUnwind(request_fast_unwind)) {
|
|
if (context)
|
|
SlowUnwindStackWithContext(pc, context, max_depth);
|
|
else
|
|
SlowUnwindStack(pc, max_depth);
|
|
} else {
|
|
FastUnwindStack(pc, bp, stack_top, stack_bottom, max_depth);
|
|
}
|
|
}
|
|
|
|
} // namespace __sanitizer
|