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//===-- tsan_symbolize.cc -------------------------------------------------===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_symbolize.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_placement_new.h"
#include "sanitizer_common/sanitizer_symbolizer.h"
#include "tsan_flags.h"
#include "tsan_report.h"
#include "tsan_rtl.h"
namespace __tsan {
void EnterSymbolizer() {
ThreadState *thr = cur_thread();
CHECK(!thr->in_symbolizer);
thr->in_symbolizer = true;
thr->ignore_interceptors++;
}
void ExitSymbolizer() {
ThreadState *thr = cur_thread();
CHECK(thr->in_symbolizer);
thr->in_symbolizer = false;
thr->ignore_interceptors--;
}
// May be overriden by JIT/JAVA/etc,
// whatever produces PCs marked with kExternalPCBit.
extern "C" bool WEAK __tsan_symbolize_external(uptr pc,
char *func_buf, uptr func_siz,
char *file_buf, uptr file_siz,
int *line, int *col) {
return false;
}
SymbolizedStack *SymbolizeCode(uptr addr) {
// Check if PC comes from non-native land.
if (addr & kExternalPCBit) {
// Declare static to not consume too much stack space.
// We symbolize reports in a single thread, so this is fine.
static char func_buf[1024];
static char file_buf[1024];
int line, col;
SymbolizedStack *frame = SymbolizedStack::New(addr);
if (__tsan_symbolize_external(addr, func_buf, sizeof(func_buf), file_buf,
sizeof(file_buf), &line, &col)) {
frame->info.function = internal_strdup(func_buf);
frame->info.file = internal_strdup(file_buf);
frame->info.line = line;
frame->info.column = col;
}
return frame;
}
return Symbolizer::GetOrInit()->SymbolizePC(addr);
}
ReportLocation *SymbolizeData(uptr addr) {
DataInfo info;
if (!Symbolizer::GetOrInit()->SymbolizeData(addr, &info))
return 0;
ReportLocation *ent = ReportLocation::New(ReportLocationGlobal);
ent->global = info;
return ent;
}
void SymbolizeFlush() {
Symbolizer::GetOrInit()->Flush();
}
} // namespace __tsan
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