1 //=-- lsan_thread.cpp -----------------------------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file is a part of LeakSanitizer.
10 // See lsan_thread.h for details.
12 //===----------------------------------------------------------------------===//
14 #include "lsan_thread.h"
17 #include "lsan_allocator.h"
18 #include "lsan_common.h"
19 #include "sanitizer_common/sanitizer_common.h"
20 #include "sanitizer_common/sanitizer_placement_new.h"
21 #include "sanitizer_common/sanitizer_thread_registry.h"
22 #include "sanitizer_common/sanitizer_tls_get_addr.h"
26 static ThreadRegistry *thread_registry;
28 static ThreadContextBase *CreateThreadContext(u32 tid) {
29 void *mem = MmapOrDie(sizeof(ThreadContext), "ThreadContext");
30 return new (mem) ThreadContext(tid);
33 static const uptr kMaxThreads = 1 << 13;
34 static const uptr kThreadQuarantineSize = 64;
36 void InitializeThreadRegistry() {
37 static ALIGNED(64) char thread_registry_placeholder[sizeof(ThreadRegistry)];
38 thread_registry = new (thread_registry_placeholder)
39 ThreadRegistry(CreateThreadContext, kMaxThreads, kThreadQuarantineSize);
42 ThreadContextLsanBase::ThreadContextLsanBase(int tid)
43 : ThreadContextBase(tid) {}
45 void ThreadContextLsanBase::OnFinished() {
46 AllocatorThreadFinish();
50 u32 ThreadCreate(u32 parent_tid, uptr user_id, bool detached, void *arg) {
51 return thread_registry->CreateThread(user_id, detached, parent_tid, arg);
54 void ThreadContextLsanBase::ThreadStart(u32 tid, tid_t os_id,
55 ThreadType thread_type, void *arg) {
56 thread_registry->StartThread(tid, os_id, thread_type, arg);
57 SetCurrentThread(tid);
61 thread_registry->FinishThread(GetCurrentThread());
62 SetCurrentThread(kInvalidTid);
65 ThreadContext *CurrentThreadContext() {
68 if (GetCurrentThread() == kInvalidTid)
70 // No lock needed when getting current thread.
71 return (ThreadContext *)thread_registry->GetThreadLocked(GetCurrentThread());
74 static bool FindThreadByUid(ThreadContextBase *tctx, void *arg) {
76 if (tctx->user_id == uid && tctx->status != ThreadStatusInvalid) {
82 u32 ThreadTid(uptr uid) {
83 return thread_registry->FindThread(FindThreadByUid, (void *)uid);
86 void ThreadJoin(u32 tid) {
87 CHECK_NE(tid, kInvalidTid);
88 thread_registry->JoinThread(tid, /* arg */ nullptr);
91 void EnsureMainThreadIDIsCorrect() {
92 if (GetCurrentThread() == 0)
93 CurrentThreadContext()->os_id = GetTid();
96 ///// Interface to the common LSan module. /////
98 void ForEachExtraStackRange(tid_t os_id, RangeIteratorCallback callback,
101 void LockThreadRegistry() { thread_registry->Lock(); }
103 void UnlockThreadRegistry() { thread_registry->Unlock(); }
105 ThreadRegistry *GetThreadRegistryLocked() {
106 thread_registry->CheckLocked();
107 return thread_registry;
110 } // namespace __lsan