124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
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//===-- tsan_symbolize.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#include "tsan_symbolize.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include "sanitizer_common/sanitizer_symbolizer.h"
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#include "tsan_flags.h"
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#include "tsan_report.h"
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#include "tsan_rtl.h"
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namespace __tsan {
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void EnterSymbolizer() {
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ThreadState *thr = cur_thread();
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CHECK(!thr->in_symbolizer);
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thr->in_symbolizer = true;
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thr->ignore_interceptors++;
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}
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void ExitSymbolizer() {
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ThreadState *thr = cur_thread();
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CHECK(thr->in_symbolizer);
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thr->in_symbolizer = false;
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thr->ignore_interceptors--;
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}
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// Legacy API.
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// May be overriden by JIT/JAVA/etc,
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// whatever produces PCs marked with kExternalPCBit.
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SANITIZER_WEAK_DEFAULT_IMPL
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bool __tsan_symbolize_external(uptr pc, char *func_buf, uptr func_siz,
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char *file_buf, uptr file_siz, int *line,
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int *col) {
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return false;
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}
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// New API: call __tsan_symbolize_external_ex only when it exists.
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// Once old clients are gone, provide dummy implementation.
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SANITIZER_WEAK_DEFAULT_IMPL
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void __tsan_symbolize_external_ex(uptr pc,
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void (*add_frame)(void *, const char *,
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const char *, int, int),
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void *ctx) {}
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struct SymbolizedStackBuilder {
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SymbolizedStack *head;
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SymbolizedStack *tail;
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uptr addr;
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};
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static void AddFrame(void *ctx, const char *function_name, const char *file,
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int line, int column) {
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SymbolizedStackBuilder *ssb = (struct SymbolizedStackBuilder *)ctx;
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if (ssb->tail) {
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ssb->tail->next = SymbolizedStack::New(ssb->addr);
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ssb->tail = ssb->tail->next;
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} else {
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ssb->head = ssb->tail = SymbolizedStack::New(ssb->addr);
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}
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AddressInfo *info = &ssb->tail->info;
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if (function_name) {
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info->function = internal_strdup(function_name);
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}
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if (file) {
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info->file = internal_strdup(file);
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}
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info->line = line;
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info->column = column;
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}
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SymbolizedStack *SymbolizeCode(uptr addr) {
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// Check if PC comes from non-native land.
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if (addr & kExternalPCBit) {
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SymbolizedStackBuilder ssb = {nullptr, nullptr, addr};
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__tsan_symbolize_external_ex(addr, AddFrame, &ssb);
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if (ssb.head)
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return ssb.head;
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// Legacy code: remove along with the declaration above
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// once all clients using this API are gone.
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// Declare static to not consume too much stack space.
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// We symbolize reports in a single thread, so this is fine.
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static char func_buf[1024];
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static char file_buf[1024];
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int line, col;
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SymbolizedStack *frame = SymbolizedStack::New(addr);
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if (__tsan_symbolize_external(addr, func_buf, sizeof(func_buf), file_buf,
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sizeof(file_buf), &line, &col)) {
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frame->info.function = internal_strdup(func_buf);
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frame->info.file = internal_strdup(file_buf);
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frame->info.line = line;
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frame->info.column = col;
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}
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return frame;
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}
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return Symbolizer::GetOrInit()->SymbolizePC(addr);
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}
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ReportLocation *SymbolizeData(uptr addr) {
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DataInfo info;
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if (!Symbolizer::GetOrInit()->SymbolizeData(addr, &info))
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return 0;
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auto *ent = New<ReportLocation>();
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ent->type = ReportLocationGlobal;
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internal_memcpy(&ent->global, &info, sizeof(info));
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return ent;
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}
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void SymbolizeFlush() {
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Symbolizer::GetOrInit()->Flush();
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}
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} // namespace __tsan
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