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//=-- lsan_thread.cpp -----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of LeakSanitizer.
// See lsan_thread.h for details.
//
//===----------------------------------------------------------------------===//
#include "lsan_thread.h"
#include "lsan.h"
#include "lsan_allocator.h"
#include "lsan_common.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_placement_new.h"
#include "sanitizer_common/sanitizer_thread_registry.h"
#include "sanitizer_common/sanitizer_tls_get_addr.h"
namespace __lsan {
static ThreadRegistry *thread_registry;
static ThreadArgRetval *thread_arg_retval;
static Mutex mu_for_thread_context;
static LowLevelAllocator allocator_for_thread_context;
static ThreadContextBase *CreateThreadContext(u32 tid) {
Lock lock(&mu_for_thread_context);
return new (allocator_for_thread_context) ThreadContext(tid);
}
void InitializeThreadRegistry() {
static ALIGNED(alignof(
ThreadRegistry)) char thread_registry_placeholder[sizeof(ThreadRegistry)];
thread_registry =
new (thread_registry_placeholder) ThreadRegistry(CreateThreadContext);
static ALIGNED(alignof(ThreadArgRetval)) char
thread_arg_retval_placeholder[sizeof(ThreadArgRetval)];
thread_arg_retval = new (thread_arg_retval_placeholder) ThreadArgRetval();
}
ThreadArgRetval &GetThreadArgRetval() { return *thread_arg_retval; }
ThreadContextLsanBase::ThreadContextLsanBase(int tid)
: ThreadContextBase(tid) {}
void ThreadContextLsanBase::OnStarted(void *arg) { SetCurrentThread(this); }
void ThreadContextLsanBase::OnFinished() {
AllocatorThreadFinish();
DTLS_Destroy();
SetCurrentThread(nullptr);
}
u32 ThreadCreate(u32 parent_tid, bool detached, void *arg) {
return thread_registry->CreateThread(0, detached, parent_tid, arg);
}
void ThreadContextLsanBase::ThreadStart(u32 tid, tid_t os_id,
ThreadType thread_type, void *arg) {
thread_registry->StartThread(tid, os_id, thread_type, arg);
}
void ThreadFinish() { thread_registry->FinishThread(GetCurrentThreadId()); }
void EnsureMainThreadIDIsCorrect() {
if (GetCurrentThreadId() == kMainTid)
GetCurrentThread()->os_id = GetTid();
}
///// Interface to the common LSan module. /////
void GetThreadExtraStackRangesLocked(tid_t os_id,
InternalMmapVector<Range> *ranges) {}
void GetThreadExtraStackRangesLocked(InternalMmapVector<Range> *ranges) {}
void LockThreadRegistry() {
thread_registry->Lock();
thread_arg_retval->Lock();
}
void UnlockThreadRegistry() {
thread_arg_retval->Unlock();
thread_registry->Unlock();
}
ThreadRegistry *GetLsanThreadRegistryLocked() {
thread_registry->CheckLocked();
return thread_registry;
}
void GetRunningThreadsLocked(InternalMmapVector<tid_t> *threads) {
GetLsanThreadRegistryLocked()->RunCallbackForEachThreadLocked(
[](ThreadContextBase *tctx, void *threads) {
if (tctx->status == ThreadStatusRunning) {
reinterpret_cast<InternalMmapVector<tid_t> *>(threads)->push_back(
tctx->os_id);
}
},
threads);
}
void GetAdditionalThreadContextPtrsLocked(InternalMmapVector<uptr> *ptrs) {
GetThreadArgRetval().GetAllPtrsLocked(ptrs);
}
} // namespace __lsan
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