sanitizer_stacktrace_libcdep.cc [plain text]
#include "sanitizer_common.h"
#include "sanitizer_stacktrace.h"
#include "sanitizer_symbolizer.h"
namespace __sanitizer {
static void PrintStackFramePrefix(InternalScopedString *buffer, uptr frame_num,
uptr pc) {
buffer->append(" #%zu 0x%zx", frame_num, pc);
}
void StackTrace::PrintStack(const uptr *addr, uptr size) {
if (addr == 0 || size == 0) {
Printf(" <empty stack>\n\n");
return;
}
InternalScopedBuffer<char> buff(GetPageSizeCached() * 2);
InternalScopedBuffer<AddressInfo> addr_frames(64);
InternalScopedString frame_desc(GetPageSizeCached() * 2);
uptr frame_num = 0;
for (uptr i = 0; i < size && addr[i]; i++) {
uptr pc = GetPreviousInstructionPc(addr[i]);
uptr addr_frames_num = Symbolizer::GetOrInit()->SymbolizePC(
pc, addr_frames.data(), addr_frames.size());
for (uptr j = 0; j < addr_frames_num; j++) {
AddressInfo &info = addr_frames[j];
frame_desc.clear();
PrintStackFramePrefix(&frame_desc, frame_num, pc);
if (info.function) {
frame_desc.append(" in %s", info.function);
if (!info.file && info.function_offset != AddressInfo::kUnknown)
frame_desc.append("+0x%zx", info.function_offset);
}
if (info.file) {
frame_desc.append(" ");
PrintSourceLocation(&frame_desc, info.file, info.line, info.column);
} else if (info.module) {
frame_desc.append(" ");
PrintModuleAndOffset(&frame_desc, info.module, info.module_offset);
}
Printf("%s\n", frame_desc.data());
frame_num++;
info.Clear();
}
}
Printf("\n");
}
void StackTrace::Unwind(uptr max_depth, uptr pc, uptr bp, uptr stack_top,
uptr stack_bottom, bool request_fast_unwind) {
if (!WillUseFastUnwind(request_fast_unwind))
SlowUnwindStack(pc, max_depth);
else
FastUnwindStack(pc, bp, stack_top, stack_bottom, max_depth);
top_frame_bp = size ? bp : 0;
}
}