142 lines
4.6 KiB
C++
142 lines
4.6 KiB
C++
//===-- tsan_suppressions.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 "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include "sanitizer_common/sanitizer_suppressions.h"
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#include "tsan_suppressions.h"
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#include "tsan_rtl.h"
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#include "tsan_flags.h"
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#include "tsan_mman.h"
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#include "tsan_platform.h"
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// Suppressions for true/false positives in standard libraries.
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static const char *const std_suppressions =
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// Libstdc++ 4.4 has data races in std::string.
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// See http://crbug.com/181502 for an example.
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"race:^_M_rep$\n"
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"race:^_M_is_leaked$\n"
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// False positive when using std <thread>.
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// Happens because we miss atomic synchronization in libstdc++.
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// See http://llvm.org/bugs/show_bug.cgi?id=17066 for details.
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"race:std::_Sp_counted_ptr_inplace<std::thread::_Impl\n";
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// Can be overriden in frontend.
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#ifndef TSAN_GO
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extern "C" const char *WEAK __tsan_default_suppressions() {
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return 0;
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}
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#endif
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namespace __tsan {
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static bool suppressions_inited = false;
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void InitializeSuppressions() {
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CHECK(!suppressions_inited);
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SuppressionContext::InitIfNecessary();
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#ifndef TSAN_GO
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SuppressionContext::Get()->Parse(__tsan_default_suppressions());
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SuppressionContext::Get()->Parse(std_suppressions);
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#endif
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suppressions_inited = true;
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}
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SuppressionType conv(ReportType typ) {
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if (typ == ReportTypeRace)
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return SuppressionRace;
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else if (typ == ReportTypeVptrRace)
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return SuppressionRace;
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else if (typ == ReportTypeUseAfterFree)
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return SuppressionRace;
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else if (typ == ReportTypeVptrUseAfterFree)
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return SuppressionRace;
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else if (typ == ReportTypeThreadLeak)
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return SuppressionThread;
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else if (typ == ReportTypeMutexDestroyLocked)
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return SuppressionMutex;
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else if (typ == ReportTypeMutexDoubleLock)
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return SuppressionMutex;
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else if (typ == ReportTypeMutexBadUnlock)
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return SuppressionMutex;
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else if (typ == ReportTypeMutexBadReadLock)
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return SuppressionMutex;
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else if (typ == ReportTypeMutexBadReadUnlock)
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return SuppressionMutex;
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else if (typ == ReportTypeSignalUnsafe)
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return SuppressionSignal;
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else if (typ == ReportTypeErrnoInSignal)
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return SuppressionNone;
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else if (typ == ReportTypeDeadlock)
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return SuppressionDeadlock;
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Printf("ThreadSanitizer: unknown report type %d\n", typ),
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Die();
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}
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uptr IsSuppressed(ReportType typ, const ReportStack *stack, Suppression **sp) {
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if (!SuppressionContext::Get()->SuppressionCount() || stack == 0 ||
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!stack->suppressable)
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return 0;
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SuppressionType stype = conv(typ);
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if (stype == SuppressionNone)
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return 0;
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Suppression *s;
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for (const ReportStack *frame = stack; frame; frame = frame->next) {
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const AddressInfo &info = frame->info;
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if (SuppressionContext::Get()->Match(info.function, stype, &s) ||
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SuppressionContext::Get()->Match(info.file, stype, &s) ||
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SuppressionContext::Get()->Match(info.module, stype, &s)) {
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DPrintf("ThreadSanitizer: matched suppression '%s'\n", s->templ);
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s->hit_count++;
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*sp = s;
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return info.address;
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}
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}
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return 0;
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}
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uptr IsSuppressed(ReportType typ, const ReportLocation *loc, Suppression **sp) {
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if (!SuppressionContext::Get()->SuppressionCount() || loc == 0 ||
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loc->type != ReportLocationGlobal || !loc->suppressable)
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return 0;
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SuppressionType stype = conv(typ);
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if (stype == SuppressionNone)
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return 0;
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Suppression *s;
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const DataInfo &global = loc->global;
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if (SuppressionContext::Get()->Match(global.name, stype, &s) ||
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SuppressionContext::Get()->Match(global.module, stype, &s)) {
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DPrintf("ThreadSanitizer: matched suppression '%s'\n", s->templ);
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s->hit_count++;
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*sp = s;
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return global.start;
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}
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return 0;
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}
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void PrintMatchedSuppressions() {
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InternalMmapVector<Suppression *> matched(1);
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SuppressionContext::Get()->GetMatched(&matched);
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if (!matched.size())
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return;
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int hit_count = 0;
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for (uptr i = 0; i < matched.size(); i++)
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hit_count += matched[i]->hit_count;
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Printf("ThreadSanitizer: Matched %d suppressions (pid=%d):\n", hit_count,
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(int)internal_getpid());
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for (uptr i = 0; i < matched.size(); i++) {
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Printf("%d %s:%s\n", matched[i]->hit_count,
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SuppressionTypeString(matched[i]->type), matched[i]->templ);
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}
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}
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} // namespace __tsan
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