153 lines
4.6 KiB
C++
153 lines
4.6 KiB
C++
//===-- tsan_symbolize.cc -------------------------------------------------===//
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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 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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ReportStack *NewReportStackEntry(uptr addr) {
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ReportStack *ent = (ReportStack*)internal_alloc(MBlockReportStack,
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sizeof(ReportStack));
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internal_memset(ent, 0, sizeof(*ent));
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ent->pc = addr;
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return ent;
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}
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static ReportStack *NewReportStackEntry(const AddressInfo &info) {
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ReportStack *ent = NewReportStackEntry(info.address);
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ent->module = StripModuleName(info.module);
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ent->offset = info.module_offset;
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if (info.function)
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ent->func = internal_strdup(info.function);
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if (info.file)
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ent->file = internal_strdup(info.file);
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ent->line = info.line;
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ent->col = info.column;
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return ent;
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}
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ReportStack *next;
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char *module;
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uptr offset;
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uptr pc;
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char *func;
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char *file;
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int line;
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int col;
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// Denotes fake PC values that come from JIT/JAVA/etc.
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// For such PC values __tsan_symbolize_external() will be called.
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const uptr kExternalPCBit = 1ULL << 60;
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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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extern "C" bool __tsan_symbolize_external(uptr pc,
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char *func_buf, uptr func_siz,
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char *file_buf, uptr file_siz,
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int *line, int *col)
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SANITIZER_WEAK_ATTRIBUTE;
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bool __tsan_symbolize_external(uptr pc,
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char *func_buf, uptr func_siz,
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char *file_buf, uptr file_siz,
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int *line, int *col) {
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return false;
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}
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ReportStack *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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// 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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if (!__tsan_symbolize_external(addr, func_buf, sizeof(func_buf),
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file_buf, sizeof(file_buf), &line, &col))
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return NewReportStackEntry(addr);
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ReportStack *ent = NewReportStackEntry(addr);
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ent->module = 0;
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ent->offset = 0;
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ent->func = internal_strdup(func_buf);
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ent->file = internal_strdup(file_buf);
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ent->line = line;
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ent->col = col;
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return ent;
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}
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static const uptr kMaxAddrFrames = 16;
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InternalScopedBuffer<AddressInfo> addr_frames(kMaxAddrFrames);
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for (uptr i = 0; i < kMaxAddrFrames; i++)
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new(&addr_frames[i]) AddressInfo();
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uptr addr_frames_num = Symbolizer::Get()->SymbolizePC(
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addr, addr_frames.data(), kMaxAddrFrames);
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if (addr_frames_num == 0)
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return NewReportStackEntry(addr);
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ReportStack *top = 0;
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ReportStack *bottom = 0;
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for (uptr i = 0; i < addr_frames_num; i++) {
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ReportStack *cur_entry = NewReportStackEntry(addr_frames[i]);
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CHECK(cur_entry);
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addr_frames[i].Clear();
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if (i == 0)
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top = cur_entry;
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else
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bottom->next = cur_entry;
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bottom = cur_entry;
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}
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return top;
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}
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ReportLocation *SymbolizeData(uptr addr) {
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DataInfo info;
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if (!Symbolizer::Get()->SymbolizeData(addr, &info))
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return 0;
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ReportLocation *ent = (ReportLocation*)internal_alloc(MBlockReportStack,
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sizeof(ReportLocation));
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internal_memset(ent, 0, sizeof(*ent));
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ent->type = ReportLocationGlobal;
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ent->module = StripModuleName(info.module);
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ent->offset = info.module_offset;
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if (info.name)
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ent->name = internal_strdup(info.name);
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ent->addr = info.start;
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ent->size = info.size;
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return ent;
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}
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void SymbolizeFlush() {
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Symbolizer::Get()->Flush();
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}
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} // namespace __tsan
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