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| Commit | Line | Data |
|---|---|---|
| 3c6331c2 ML |
1 | //=-- lsan_posix.cpp -----------------------------------------------------===// |
| 2 | // | |
| 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 | |
| 6 | // | |
| 7 | //===---------------------------------------------------------------------===// | |
| 8 | // | |
| 9 | // This file is a part of LeakSanitizer. | |
| 10 | // Standalone LSan RTL code common to POSIX-like systems. | |
| 11 | // | |
| 12 | //===---------------------------------------------------------------------===// | |
| 13 | ||
| 14 | #include "sanitizer_common/sanitizer_platform.h" | |
| 15 | ||
| 16 | #if SANITIZER_POSIX | |
| 17 | #include "lsan.h" | |
| 18 | #include "lsan_allocator.h" | |
| 19 | #include "sanitizer_common/sanitizer_stacktrace.h" | |
| 20 | #include "sanitizer_common/sanitizer_tls_get_addr.h" | |
| 21 | ||
| 22 | namespace __lsan { | |
| 23 | ||
| 24 | ThreadContext::ThreadContext(int tid) : ThreadContextLsanBase(tid) {} | |
| 25 | ||
| 26 | struct OnStartedArgs { | |
| 27 | uptr stack_begin; | |
| 28 | uptr stack_end; | |
| 29 | uptr cache_begin; | |
| 30 | uptr cache_end; | |
| 31 | uptr tls_begin; | |
| 32 | uptr tls_end; | |
| 33 | DTLS *dtls; | |
| 34 | }; | |
| 35 | ||
| 36 | void ThreadContext::OnStarted(void *arg) { | |
| 37 | auto args = reinterpret_cast<const OnStartedArgs *>(arg); | |
| 38 | stack_begin_ = args->stack_begin; | |
| 39 | stack_end_ = args->stack_end; | |
| 40 | tls_begin_ = args->tls_begin; | |
| 41 | tls_end_ = args->tls_end; | |
| 42 | cache_begin_ = args->cache_begin; | |
| 43 | cache_end_ = args->cache_end; | |
| 44 | dtls_ = args->dtls; | |
| 45 | } | |
| 46 | ||
| 47 | void ThreadStart(u32 tid, tid_t os_id, ThreadType thread_type) { | |
| 48 | OnStartedArgs args; | |
| 49 | uptr stack_size = 0; | |
| 50 | uptr tls_size = 0; | |
| 51 | GetThreadStackAndTls(tid == 0, &args.stack_begin, &stack_size, | |
| 52 | &args.tls_begin, &tls_size); | |
| 53 | args.stack_end = args.stack_begin + stack_size; | |
| 54 | args.tls_end = args.tls_begin + tls_size; | |
| 55 | GetAllocatorCacheRange(&args.cache_begin, &args.cache_end); | |
| 56 | args.dtls = DTLS_Get(); | |
| 57 | ThreadContextLsanBase::ThreadStart(tid, os_id, thread_type, &args); | |
| 58 | } | |
| 59 | ||
| 60 | bool GetThreadRangesLocked(tid_t os_id, uptr *stack_begin, uptr *stack_end, | |
| 61 | uptr *tls_begin, uptr *tls_end, uptr *cache_begin, | |
| 62 | uptr *cache_end, DTLS **dtls) { | |
| 63 | ThreadContext *context = static_cast<ThreadContext *>( | |
| 64 | GetThreadRegistryLocked()->FindThreadContextByOsIDLocked(os_id)); | |
| 65 | if (!context) | |
| 66 | return false; | |
| 67 | *stack_begin = context->stack_begin(); | |
| 68 | *stack_end = context->stack_end(); | |
| 69 | *tls_begin = context->tls_begin(); | |
| 70 | *tls_end = context->tls_end(); | |
| 71 | *cache_begin = context->cache_begin(); | |
| 72 | *cache_end = context->cache_end(); | |
| 73 | *dtls = context->dtls(); | |
| 74 | return true; | |
| 75 | } | |
| 76 | ||
| 77 | void InitializeMainThread() { | |
| 78 | u32 tid = ThreadCreate(0, 0, true); | |
| 79 | CHECK_EQ(tid, 0); | |
| 80 | ThreadStart(tid, GetTid()); | |
| 81 | } | |
| 82 | ||
| 83 | static void OnStackUnwind(const SignalContext &sig, const void *, | |
| 84 | BufferedStackTrace *stack) { | |
| 85 | stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context, | |
| 86 | common_flags()->fast_unwind_on_fatal); | |
| 87 | } | |
| 88 | ||
| 89 | void LsanOnDeadlySignal(int signo, void *siginfo, void *context) { | |
| 90 | HandleDeadlySignal(siginfo, context, GetCurrentThread(), &OnStackUnwind, | |
| 91 | nullptr); | |
| 92 | } | |
| 93 | ||
| 94 | } // namespace __lsan | |
| 95 | ||
| 96 | #endif // SANITIZER_POSIX |