2019-08-14 10:47:11 +02:00
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//===-- tsan_rtl_thread.cpp -----------------------------------------------===//
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2012-11-22 23:03:11 +01:00
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//
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2019-08-14 10:47:11 +02:00
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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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2012-11-22 23:03:11 +01:00
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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_placement_new.h"
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#include "tsan_rtl.h"
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#include "tsan_mman.h"
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#include "tsan_platform.h"
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#include "tsan_report.h"
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#include "tsan_sync.h"
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namespace __tsan {
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2013-11-04 22:33:31 +01:00
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// ThreadContext implementation.
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2021-09-27 19:43:33 +02:00
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ThreadContext::ThreadContext(Tid tid)
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: ThreadContextBase(tid), thr(), sync(), epoch0(), epoch1() {}
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2013-11-04 22:33:31 +01:00
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2013-11-04 22:33:31 +01:00
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ThreadContext::~ThreadContext() {
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}
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2012-11-22 23:03:11 +01:00
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#endif
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2013-11-04 22:33:31 +01:00
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void ThreadContext::OnReset() {
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2014-09-23 19:59:53 +02:00
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CHECK_EQ(sync.size(), 0);
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ubsan.c (ubsan_expand_null_ifn): Use _v1 suffixed type mismatch builtins...
* ubsan.c (ubsan_expand_null_ifn): Use _v1 suffixed type mismatch
builtins, store max (log2 (align), 0) into uchar field instead of
align into uptr field.
(ubsan_expand_objsize_ifn): Use _v1 suffixed type mismatch builtins,
store uchar 0 field instead of uptr 0 field.
(instrument_nonnull_return): Use _v1 suffixed nonnull return builtin,
instead of passing one address of struct with 2 locations pass
two addresses of structs with 1 location each.
* sanitizer.def (BUILT_IN_UBSAN_HANDLE_TYPE_MISMATCH,
BUILT_IN_UBSAN_HANDLE_TYPE_MISMATCH_ABORT,
BUILT_IN_UBSAN_HANDLE_NONNULL_RETURN,
BUILT_IN_UBSAN_HANDLE_NONNULL_RETURN_ABORT): Removed.
(BUILT_IN_UBSAN_HANDLE_TYPE_MISMATCH_V1,
BUILT_IN_UBSAN_HANDLE_TYPE_MISMATCH_V1_ABORT,
BUILT_IN_UBSAN_HANDLE_NONNULL_RETURN_V1,
BUILT_IN_UBSAN_HANDLE_NONNULL_RETURN_V1_ABORT): New builtins.
* c-c++-common/ubsan/float-cast-overflow-1.c: Drop value keyword
from expected output regexps.
* c-c++-common/ubsan/float-cast-overflow-2.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-3.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-4.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-5.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-6.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-8.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-9.c: Likewise.
* c-c++-common/ubsan/float-cast-overflow-10.c: Likewise.
* g++.dg/ubsan/float-cast-overflow-bf.C: Likewise.
* gcc.dg/ubsan/float-cast-overflow-bf.c: Likewise.
* g++.dg/asan/default-options-1.C (__asan_default_options): Add
used attribute.
* g++.dg/asan/asan_test.C: Run with ASAN_OPTIONS=handle_segv=2
in the environment.
* All source files: Merge from upstream 315899.
* asan/Makefile.am (nodist_saninclude_HEADERS): Add
include/sanitizer/tsan_interface.h.
* asan/libtool-version: Bump the libasan SONAME.
* lsan/Makefile.am (sanitizer_lsan_files): Add lsan_common_mac.cc.
(lsan_files): Add lsan_linux.cc, lsan_mac.cc and lsan_malloc_mac.cc.
* sanitizer_common/Makefile.am (sanitizer_common_files): Add
sancov_flags.cc, sanitizer_allocator_checks.cc,
sanitizer_coverage_libcdep_new.cc, sanitizer_errno.cc,
sanitizer_file.cc, sanitizer_mac_libcdep.cc and
sanitizer_stoptheworld_mac.cc. Remove sanitizer_coverage_libcdep.cc
and sanitizer_coverage_mapping_libcdep.cc.
* tsan/Makefile.am (tsan_files): Add tsan_external.cc.
* ubsan/Makefile.am (DEFS): Add -DUBSAN_CAN_USE_CXXABI=1.
(ubsan_files): Add ubsan_init_standalone.cc and
ubsan_signals_standalone.cc.
* ubsan/libtool-version: Bump the libubsan SONAME.
* asan/Makefile.in: Regenerate.
* lsan/Makefile.in: Regenerate.
* sanitizer_common/Makefile.in: Regenerate.
* tsan/Makefile.in: Regenerate.
* ubsan/Makefile.in: Regenerate.
From-SVN: r253887
2017-10-19 13:23:59 +02:00
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uptr trace_p = GetThreadTrace(tid);
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ReleaseMemoryPagesToOS(trace_p, trace_p + TraceSize() * sizeof(Event));
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2016-11-08 23:04:09 +01:00
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//!!! ReleaseMemoryToOS(GetThreadTraceHeader(tid), sizeof(Trace));
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2013-11-04 22:33:31 +01:00
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}
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2013-11-04 22:33:31 +01:00
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struct ThreadLeak {
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ThreadContext *tctx;
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int count;
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};
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2021-09-27 19:43:33 +02:00
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static void CollectThreadLeaks(ThreadContextBase *tctx_base, void *arg) {
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auto &leaks = *static_cast<Vector<ThreadLeak> *>(arg);
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auto *tctx = static_cast<ThreadContext *>(tctx_base);
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2013-11-04 22:33:31 +01:00
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if (tctx->detached || tctx->status != ThreadStatusFinished)
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2012-11-22 23:03:11 +01:00
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return;
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2013-11-04 22:33:31 +01:00
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for (uptr i = 0; i < leaks.Size(); i++) {
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if (leaks[i].tctx->creation_stack_id == tctx->creation_stack_id) {
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leaks[i].count++;
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return;
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}
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}
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2021-09-27 19:43:33 +02:00
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leaks.PushBack({tctx, 1});
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2013-11-04 22:33:31 +01:00
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}
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#endif
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2013-12-05 10:18:38 +01:00
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static void ReportIgnoresEnabled(ThreadContext *tctx, IgnoreSet *set) {
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2021-05-12 14:37:22 +02:00
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if (tctx->tid == kMainTid) {
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2013-12-05 10:18:38 +01:00
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Printf("ThreadSanitizer: main thread finished with ignores enabled\n");
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} else {
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Printf("ThreadSanitizer: thread T%d %s finished with ignores enabled,"
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" created at:\n", tctx->tid, tctx->name);
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PrintStack(SymbolizeStackId(tctx->creation_stack_id));
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}
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Printf(" One of the following ignores was not ended"
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" (in order of probability)\n");
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for (uptr i = 0; i < set->Size(); i++) {
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Printf(" Ignore was enabled at:\n");
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PrintStack(SymbolizeStackId(set->At(i)));
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2013-11-04 22:33:31 +01:00
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}
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2013-12-05 10:18:38 +01:00
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Die();
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2012-11-22 23:03:11 +01:00
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}
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2013-12-05 10:18:38 +01:00
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static void ThreadCheckIgnore(ThreadState *thr) {
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2014-05-22 09:09:21 +02:00
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if (ctx->after_multithreaded_fork)
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return;
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2013-12-05 10:18:38 +01:00
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if (thr->ignore_reads_and_writes)
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ReportIgnoresEnabled(thr->tctx, &thr->mop_ignore_set);
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if (thr->ignore_sync)
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ReportIgnoresEnabled(thr->tctx, &thr->sync_ignore_set);
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}
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#else
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static void ThreadCheckIgnore(ThreadState *thr) {}
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#endif
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2012-11-22 23:03:11 +01:00
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void ThreadFinalize(ThreadState *thr) {
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2013-11-04 22:33:31 +01:00
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ThreadCheckIgnore(thr);
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2021-05-12 14:37:22 +02:00
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if (!ShouldReport(thr, ReportTypeThreadLeak))
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2012-11-22 23:03:11 +01:00
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return;
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2021-09-27 19:43:33 +02:00
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ThreadRegistryLock l(&ctx->thread_registry);
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2018-10-31 12:14:23 +01:00
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Vector<ThreadLeak> leaks;
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2021-09-27 19:43:33 +02:00
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ctx->thread_registry.RunCallbackForEachThreadLocked(CollectThreadLeaks,
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&leaks);
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2013-11-04 22:33:31 +01:00
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for (uptr i = 0; i < leaks.Size(); i++) {
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ScopedReport rep(ReportTypeThreadLeak);
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2014-09-23 19:59:53 +02:00
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rep.AddThread(leaks[i].tctx, true);
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2013-11-04 22:33:31 +01:00
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rep.SetCount(leaks[i].count);
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2014-09-23 19:59:53 +02:00
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OutputReport(thr, rep);
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2012-11-22 23:03:11 +01:00
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}
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2013-11-04 22:33:31 +01:00
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#endif
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2012-11-22 23:03:11 +01:00
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}
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2012-11-23 15:46:25 +01:00
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int ThreadCount(ThreadState *thr) {
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2013-11-04 22:33:31 +01:00
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uptr result;
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2021-09-27 19:43:33 +02:00
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ctx->thread_registry.GetNumberOfThreads(0, 0, &result);
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2013-11-04 22:33:31 +01:00
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return (int)result;
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2012-11-22 23:03:11 +01:00
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}
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2021-09-27 19:43:33 +02:00
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struct OnCreatedArgs {
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ThreadState *thr;
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uptr pc;
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};
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Tid ThreadCreate(ThreadState *thr, uptr pc, uptr uid, bool detached) {
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2013-11-04 22:33:31 +01:00
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OnCreatedArgs args = { thr, pc };
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2015-11-23 10:07:18 +01:00
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u32 parent_tid = thr ? thr->tid : kInvalidTid; // No parent for GCD workers.
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2021-09-27 19:43:33 +02:00
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Tid tid = ctx->thread_registry.CreateThread(uid, detached, parent_tid, &args);
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2015-11-23 10:07:18 +01:00
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DPrintf("#%d: ThreadCreate tid=%d uid=%zu\n", parent_tid, tid, uid);
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2012-11-22 23:03:11 +01:00
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return tid;
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}
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2021-09-27 19:43:33 +02:00
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void ThreadContext::OnCreated(void *arg) {
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thr = 0;
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if (tid == kMainTid)
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return;
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OnCreatedArgs *args = static_cast<OnCreatedArgs *>(arg);
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if (!args->thr) // GCD workers don't have a parent thread.
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return;
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args->thr->fast_state.IncrementEpoch();
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// Can't increment epoch w/o writing to the trace as well.
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TraceAddEvent(args->thr, args->thr->fast_state, EventTypeMop, 0);
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ReleaseImpl(args->thr, 0, &sync);
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creation_stack_id = CurrentStackId(args->thr, args->pc);
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}
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extern "C" void __tsan_stack_initialization() {}
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struct OnStartedArgs {
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ThreadState *thr;
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uptr stk_addr;
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uptr stk_size;
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uptr tls_addr;
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uptr tls_size;
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};
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void ThreadStart(ThreadState *thr, Tid tid, tid_t os_id,
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2019-08-14 10:47:11 +02:00
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ThreadType thread_type) {
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2012-11-22 23:03:11 +01:00
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uptr stk_addr = 0;
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uptr stk_size = 0;
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uptr tls_addr = 0;
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uptr tls_size = 0;
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2019-08-14 10:47:11 +02:00
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if (thread_type != ThreadType::Fiber)
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2021-05-12 14:37:22 +02:00
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GetThreadStackAndTls(tid == kMainTid, &stk_addr, &stk_size, &tls_addr,
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&tls_size);
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2015-10-21 09:32:45 +02:00
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#endif
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2012-11-22 23:03:11 +01:00
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2021-09-27 19:43:33 +02:00
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ThreadRegistry *tr = &ctx->thread_registry;
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2013-11-04 22:33:31 +01:00
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OnStartedArgs args = { thr, stk_addr, stk_size, tls_addr, tls_size };
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2019-08-14 10:47:11 +02:00
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tr->StartThread(tid, os_id, thread_type, &args);
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2013-12-05 10:18:38 +01:00
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2021-09-27 19:43:33 +02:00
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while (!thr->tctx->trace.parts.Empty()) thr->tctx->trace.parts.PopBack();
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2014-05-22 09:09:21 +02:00
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2016-11-08 23:04:09 +01:00
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#if !SANITIZER_GO
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2014-05-22 09:09:21 +02:00
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if (ctx->after_multithreaded_fork) {
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thr->ignore_interceptors++;
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ThreadIgnoreBegin(thr, 0);
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ThreadIgnoreSyncBegin(thr, 0);
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}
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#endif
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2021-09-27 19:43:33 +02:00
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#if !SANITIZER_GO
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// Don't imitate stack/TLS writes for the main thread,
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// because its initialization is synchronized with all
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// subsequent threads anyway.
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if (tid != kMainTid) {
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if (stk_addr && stk_size) {
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const uptr pc = StackTrace::GetNextInstructionPc(
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reinterpret_cast<uptr>(__tsan_stack_initialization));
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MemoryRangeImitateWrite(thr, pc, stk_addr, stk_size);
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}
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if (tls_addr && tls_size)
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ImitateTlsWrite(thr, tls_addr, tls_size);
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}
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#endif
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}
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void ThreadContext::OnStarted(void *arg) {
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OnStartedArgs *args = static_cast<OnStartedArgs *>(arg);
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thr = args->thr;
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// RoundUp so that one trace part does not contain events
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// from different threads.
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epoch0 = RoundUp(epoch1 + 1, kTracePartSize);
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epoch1 = (u64)-1;
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new (thr)
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ThreadState(ctx, tid, unique_id, epoch0, reuse_count, args->stk_addr,
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args->stk_size, args->tls_addr, args->tls_size);
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if (common_flags()->detect_deadlocks)
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thr->dd_lt = ctx->dd->CreateLogicalThread(unique_id);
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thr->fast_state.SetHistorySize(flags()->history_size);
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// Commit switch to the new part of the trace.
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// TraceAddEvent will reset stack0/mset0 in the new part for us.
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TraceAddEvent(thr, thr->fast_state, EventTypeMop, 0);
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thr->fast_synch_epoch = epoch0;
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AcquireImpl(thr, 0, &sync);
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sync.Reset(&thr->proc()->clock_cache);
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thr->tctx = this;
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thr->is_inited = true;
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DPrintf(
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"#%d: ThreadStart epoch=%zu stk_addr=%zx stk_size=%zx "
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"tls_addr=%zx tls_size=%zx\n",
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tid, (uptr)epoch0, args->stk_addr, args->stk_size, args->tls_addr,
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args->tls_size);
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2012-11-22 23:03:11 +01:00
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}
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void ThreadFinish(ThreadState *thr) {
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2013-11-04 22:33:31 +01:00
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ThreadCheckIgnore(thr);
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2012-11-22 23:03:11 +01:00
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if (thr->stk_addr && thr->stk_size)
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2013-11-04 22:33:31 +01:00
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DontNeedShadowFor(thr->stk_addr, thr->stk_size);
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if (thr->tls_addr && thr->tls_size)
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DontNeedShadowFor(thr->tls_addr, thr->tls_size);
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2014-09-23 19:59:53 +02:00
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thr->is_dead = true;
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2021-09-27 19:43:33 +02:00
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ctx->thread_registry.FinishThread(thr->tid);
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}
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void ThreadContext::OnFinished() {
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#if SANITIZER_GO
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Free(thr->shadow_stack);
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thr->shadow_stack_pos = nullptr;
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thr->shadow_stack_end = nullptr;
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#endif
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if (!detached) {
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thr->fast_state.IncrementEpoch();
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// Can't increment epoch w/o writing to the trace as well.
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TraceAddEvent(thr, thr->fast_state, EventTypeMop, 0);
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ReleaseImpl(thr, 0, &sync);
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}
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epoch1 = thr->fast_state.epoch();
|
|
|
|
|
|
|
|
if (common_flags()->detect_deadlocks)
|
|
|
|
ctx->dd->DestroyLogicalThread(thr->dd_lt);
|
|
|
|
thr->clock.ResetCached(&thr->proc()->clock_cache);
|
|
|
|
#if !SANITIZER_GO
|
|
|
|
thr->last_sleep_clock.ResetCached(&thr->proc()->clock_cache);
|
|
|
|
#endif
|
|
|
|
#if !SANITIZER_GO
|
|
|
|
PlatformCleanUpThreadState(thr);
|
|
|
|
#endif
|
|
|
|
thr->~ThreadState();
|
|
|
|
thr = 0;
|
2013-11-04 22:33:31 +01:00
|
|
|
}
|
2012-11-22 23:03:11 +01:00
|
|
|
|
2020-06-01 21:15:18 +02:00
|
|
|
struct ConsumeThreadContext {
|
|
|
|
uptr uid;
|
|
|
|
ThreadContextBase *tctx;
|
|
|
|
};
|
|
|
|
|
|
|
|
static bool ConsumeThreadByUid(ThreadContextBase *tctx, void *arg) {
|
|
|
|
ConsumeThreadContext *findCtx = (ConsumeThreadContext *)arg;
|
|
|
|
if (tctx->user_id == findCtx->uid && tctx->status != ThreadStatusInvalid) {
|
|
|
|
if (findCtx->tctx) {
|
|
|
|
// Ensure that user_id is unique. If it's not the case we are screwed.
|
|
|
|
// Something went wrong before, but now there is no way to recover.
|
|
|
|
// Returning a wrong thread is not an option, it may lead to very hard
|
|
|
|
// to debug false positives (e.g. if we join a wrong thread).
|
|
|
|
Report("ThreadSanitizer: dup thread with used id 0x%zx\n", findCtx->uid);
|
|
|
|
Die();
|
|
|
|
}
|
|
|
|
findCtx->tctx = tctx;
|
2013-11-04 22:33:31 +01:00
|
|
|
tctx->user_id = 0;
|
2012-11-22 23:03:11 +01:00
|
|
|
}
|
2013-11-04 22:33:31 +01:00
|
|
|
return false;
|
2012-11-22 23:03:11 +01:00
|
|
|
}
|
|
|
|
|
2021-09-27 19:43:33 +02:00
|
|
|
Tid ThreadConsumeTid(ThreadState *thr, uptr pc, uptr uid) {
|
2020-06-01 21:15:18 +02:00
|
|
|
ConsumeThreadContext findCtx = {uid, nullptr};
|
2021-09-27 19:43:33 +02:00
|
|
|
ctx->thread_registry.FindThread(ConsumeThreadByUid, &findCtx);
|
|
|
|
Tid tid = findCtx.tctx ? findCtx.tctx->tid : kInvalidTid;
|
2020-06-01 21:15:18 +02:00
|
|
|
DPrintf("#%d: ThreadTid uid=%zu tid=%d\n", thr->tid, uid, tid);
|
|
|
|
return tid;
|
2012-11-22 23:03:11 +01:00
|
|
|
}
|
|
|
|
|
2021-09-27 19:43:33 +02:00
|
|
|
void ThreadJoin(ThreadState *thr, uptr pc, Tid tid) {
|
2012-11-22 23:03:11 +01:00
|
|
|
CHECK_GT(tid, 0);
|
|
|
|
CHECK_LT(tid, kMaxTid);
|
|
|
|
DPrintf("#%d: ThreadJoin tid=%d\n", thr->tid, tid);
|
2021-09-27 19:43:33 +02:00
|
|
|
ctx->thread_registry.JoinThread(tid, thr);
|
2012-11-22 23:03:11 +01:00
|
|
|
}
|
|
|
|
|
2021-09-27 19:43:33 +02:00
|
|
|
void ThreadContext::OnJoined(void *arg) {
|
|
|
|
ThreadState *caller_thr = static_cast<ThreadState *>(arg);
|
|
|
|
AcquireImpl(caller_thr, 0, &sync);
|
|
|
|
sync.Reset(&caller_thr->proc()->clock_cache);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ThreadContext::OnDead() { CHECK_EQ(sync.size(), 0); }
|
|
|
|
|
|
|
|
void ThreadDetach(ThreadState *thr, uptr pc, Tid tid) {
|
2012-11-22 23:03:11 +01:00
|
|
|
CHECK_GT(tid, 0);
|
|
|
|
CHECK_LT(tid, kMaxTid);
|
2021-09-27 19:43:33 +02:00
|
|
|
ctx->thread_registry.DetachThread(tid, thr);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ThreadContext::OnDetached(void *arg) {
|
|
|
|
ThreadState *thr1 = static_cast<ThreadState *>(arg);
|
|
|
|
sync.Reset(&thr1->proc()->clock_cache);
|
2012-11-22 23:03:11 +01:00
|
|
|
}
|
|
|
|
|
2021-09-27 19:43:33 +02:00
|
|
|
void ThreadNotJoined(ThreadState *thr, uptr pc, Tid tid, uptr uid) {
|
2019-08-14 10:47:11 +02:00
|
|
|
CHECK_GT(tid, 0);
|
|
|
|
CHECK_LT(tid, kMaxTid);
|
2021-09-27 19:43:33 +02:00
|
|
|
ctx->thread_registry.SetThreadUserId(tid, uid);
|
2019-08-14 10:47:11 +02:00
|
|
|
}
|
|
|
|
|
2012-12-05 14:19:55 +01:00
|
|
|
void ThreadSetName(ThreadState *thr, const char *name) {
|
2021-09-27 19:43:33 +02:00
|
|
|
ctx->thread_registry.SetThreadName(thr->tid, name);
|
2012-12-05 14:19:55 +01:00
|
|
|
}
|
|
|
|
|
2019-08-14 10:47:11 +02:00
|
|
|
#if !SANITIZER_GO
|
|
|
|
void FiberSwitchImpl(ThreadState *from, ThreadState *to) {
|
|
|
|
Processor *proc = from->proc();
|
|
|
|
ProcUnwire(proc, from);
|
|
|
|
ProcWire(proc, to);
|
|
|
|
set_cur_thread(to);
|
|
|
|
}
|
|
|
|
|
|
|
|
ThreadState *FiberCreate(ThreadState *thr, uptr pc, unsigned flags) {
|
2021-09-27 19:43:33 +02:00
|
|
|
void *mem = Alloc(sizeof(ThreadState));
|
2019-08-14 10:47:11 +02:00
|
|
|
ThreadState *fiber = static_cast<ThreadState *>(mem);
|
|
|
|
internal_memset(fiber, 0, sizeof(*fiber));
|
2021-09-27 19:43:33 +02:00
|
|
|
Tid tid = ThreadCreate(thr, pc, 0, true);
|
2019-08-14 10:47:11 +02:00
|
|
|
FiberSwitchImpl(thr, fiber);
|
|
|
|
ThreadStart(fiber, tid, 0, ThreadType::Fiber);
|
|
|
|
FiberSwitchImpl(fiber, thr);
|
|
|
|
return fiber;
|
|
|
|
}
|
|
|
|
|
|
|
|
void FiberDestroy(ThreadState *thr, uptr pc, ThreadState *fiber) {
|
|
|
|
FiberSwitchImpl(thr, fiber);
|
|
|
|
ThreadFinish(fiber);
|
|
|
|
FiberSwitchImpl(fiber, thr);
|
2021-09-27 19:43:33 +02:00
|
|
|
Free(fiber);
|
2019-08-14 10:47:11 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void FiberSwitch(ThreadState *thr, uptr pc,
|
|
|
|
ThreadState *fiber, unsigned flags) {
|
|
|
|
if (!(flags & FiberSwitchFlagNoSync))
|
|
|
|
Release(thr, pc, (uptr)fiber);
|
|
|
|
FiberSwitchImpl(thr, fiber);
|
|
|
|
if (!(flags & FiberSwitchFlagNoSync))
|
|
|
|
Acquire(fiber, pc, (uptr)fiber);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-11-22 23:03:11 +01:00
|
|
|
} // namespace __tsan
|