97 lines
3.0 KiB
C++
97 lines
3.0 KiB
C++
//=-- lsan_posix.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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// Standalone LSan RTL code common to POSIX-like systems.
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//
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//===---------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_platform.h"
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#if SANITIZER_POSIX
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#include "lsan.h"
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#include "lsan_allocator.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "sanitizer_common/sanitizer_tls_get_addr.h"
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namespace __lsan {
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ThreadContext::ThreadContext(int tid) : ThreadContextLsanBase(tid) {}
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struct OnStartedArgs {
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uptr stack_begin;
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uptr stack_end;
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uptr cache_begin;
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uptr cache_end;
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uptr tls_begin;
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uptr tls_end;
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DTLS *dtls;
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};
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void ThreadContext::OnStarted(void *arg) {
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auto args = reinterpret_cast<const OnStartedArgs *>(arg);
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stack_begin_ = args->stack_begin;
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stack_end_ = args->stack_end;
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tls_begin_ = args->tls_begin;
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tls_end_ = args->tls_end;
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cache_begin_ = args->cache_begin;
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cache_end_ = args->cache_end;
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dtls_ = args->dtls;
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}
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void ThreadStart(u32 tid, tid_t os_id, ThreadType thread_type) {
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OnStartedArgs args;
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uptr stack_size = 0;
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uptr tls_size = 0;
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GetThreadStackAndTls(tid == kMainTid, &args.stack_begin, &stack_size,
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&args.tls_begin, &tls_size);
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args.stack_end = args.stack_begin + stack_size;
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args.tls_end = args.tls_begin + tls_size;
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GetAllocatorCacheRange(&args.cache_begin, &args.cache_end);
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args.dtls = DTLS_Get();
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ThreadContextLsanBase::ThreadStart(tid, os_id, thread_type, &args);
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}
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bool GetThreadRangesLocked(tid_t os_id, uptr *stack_begin, uptr *stack_end,
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uptr *tls_begin, uptr *tls_end, uptr *cache_begin,
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uptr *cache_end, DTLS **dtls) {
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ThreadContext *context = static_cast<ThreadContext *>(
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GetThreadRegistryLocked()->FindThreadContextByOsIDLocked(os_id));
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if (!context)
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return false;
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*stack_begin = context->stack_begin();
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*stack_end = context->stack_end();
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*tls_begin = context->tls_begin();
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*tls_end = context->tls_end();
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*cache_begin = context->cache_begin();
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*cache_end = context->cache_end();
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*dtls = context->dtls();
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return true;
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}
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void InitializeMainThread() {
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u32 tid = ThreadCreate(kMainTid, 0, true);
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CHECK_EQ(tid, kMainTid);
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ThreadStart(tid, GetTid());
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}
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static void OnStackUnwind(const SignalContext &sig, const void *,
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BufferedStackTrace *stack) {
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stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context,
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common_flags()->fast_unwind_on_fatal);
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}
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void LsanOnDeadlySignal(int signo, void *siginfo, void *context) {
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HandleDeadlySignal(siginfo, context, GetCurrentThread(), &OnStackUnwind,
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nullptr);
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}
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} // namespace __lsan
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#endif // SANITIZER_POSIX
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