116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
//=-- lsan_thread.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 LeakSanitizer.
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// See lsan_thread.h for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lsan_thread.h"
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#include "lsan.h"
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#include "lsan_allocator.h"
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#include "lsan_common.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_thread_registry.h"
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#include "sanitizer_common/sanitizer_tls_get_addr.h"
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namespace __lsan {
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static ThreadRegistry *thread_registry;
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static ThreadContextBase *CreateThreadContext(u32 tid) {
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void *mem = MmapOrDie(sizeof(ThreadContext), "ThreadContext");
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return new (mem) ThreadContext(tid);
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}
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static const uptr kMaxThreads = 1 << 13;
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static const uptr kThreadQuarantineSize = 64;
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void InitializeThreadRegistry() {
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static ALIGNED(64) char thread_registry_placeholder[sizeof(ThreadRegistry)];
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thread_registry = new (thread_registry_placeholder)
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ThreadRegistry(CreateThreadContext, kMaxThreads, kThreadQuarantineSize);
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}
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ThreadContextLsanBase::ThreadContextLsanBase(int tid)
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: ThreadContextBase(tid) {}
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void ThreadContextLsanBase::OnFinished() {
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AllocatorThreadFinish();
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DTLS_Destroy();
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}
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u32 ThreadCreate(u32 parent_tid, uptr user_id, bool detached, void *arg) {
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return thread_registry->CreateThread(user_id, detached, parent_tid, arg);
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}
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void ThreadContextLsanBase::ThreadStart(u32 tid, tid_t os_id,
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ThreadType thread_type, void *arg) {
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thread_registry->StartThread(tid, os_id, thread_type, arg);
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SetCurrentThread(tid);
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}
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void ThreadFinish() {
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thread_registry->FinishThread(GetCurrentThread());
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SetCurrentThread(kInvalidTid);
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}
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ThreadContext *CurrentThreadContext() {
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if (!thread_registry)
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return nullptr;
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if (GetCurrentThread() == kInvalidTid)
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return nullptr;
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// No lock needed when getting current thread.
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return (ThreadContext *)thread_registry->GetThreadLocked(GetCurrentThread());
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}
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static bool FindThreadByUid(ThreadContextBase *tctx, void *arg) {
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uptr uid = (uptr)arg;
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if (tctx->user_id == uid && tctx->status != ThreadStatusInvalid) {
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return true;
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}
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return false;
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}
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u32 ThreadTid(uptr uid) {
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return thread_registry->FindThread(FindThreadByUid, (void *)uid);
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}
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void ThreadDetach(u32 tid) {
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CHECK_NE(tid, kInvalidTid);
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thread_registry->DetachThread(tid, /* arg */ nullptr);
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}
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void ThreadJoin(u32 tid) {
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CHECK_NE(tid, kInvalidTid);
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thread_registry->JoinThread(tid, /* arg */ nullptr);
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}
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void EnsureMainThreadIDIsCorrect() {
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if (GetCurrentThread() == 0)
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CurrentThreadContext()->os_id = GetTid();
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}
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///// Interface to the common LSan module. /////
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void ForEachExtraStackRange(tid_t os_id, RangeIteratorCallback callback,
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void *arg) {}
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void LockThreadRegistry() { thread_registry->Lock(); }
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void UnlockThreadRegistry() { thread_registry->Unlock(); }
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ThreadRegistry *GetThreadRegistryLocked() {
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thread_registry->CheckLocked();
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return thread_registry;
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}
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} // namespace __lsan
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