1*5ffd83dbSDimitry Andric //=-- lsan_posix.cpp -----------------------------------------------------===// 2*5ffd83dbSDimitry Andric // 3*5ffd83dbSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*5ffd83dbSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*5ffd83dbSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*5ffd83dbSDimitry Andric // 7*5ffd83dbSDimitry Andric //===---------------------------------------------------------------------===// 8*5ffd83dbSDimitry Andric // 9*5ffd83dbSDimitry Andric // This file is a part of LeakSanitizer. 10*5ffd83dbSDimitry Andric // Standalone LSan RTL code common to POSIX-like systems. 11*5ffd83dbSDimitry Andric // 12*5ffd83dbSDimitry Andric //===---------------------------------------------------------------------===// 13*5ffd83dbSDimitry Andric 14*5ffd83dbSDimitry Andric #include "sanitizer_common/sanitizer_platform.h" 15*5ffd83dbSDimitry Andric 16*5ffd83dbSDimitry Andric #if SANITIZER_POSIX 17*5ffd83dbSDimitry Andric #include "lsan.h" 18*5ffd83dbSDimitry Andric #include "lsan_allocator.h" 19*5ffd83dbSDimitry Andric #include "sanitizer_common/sanitizer_stacktrace.h" 20*5ffd83dbSDimitry Andric #include "sanitizer_common/sanitizer_tls_get_addr.h" 21*5ffd83dbSDimitry Andric 22*5ffd83dbSDimitry Andric namespace __lsan { 23*5ffd83dbSDimitry Andric 24*5ffd83dbSDimitry Andric ThreadContext::ThreadContext(int tid) : ThreadContextLsanBase(tid) {} 25*5ffd83dbSDimitry Andric 26*5ffd83dbSDimitry Andric struct OnStartedArgs { 27*5ffd83dbSDimitry Andric uptr stack_begin; 28*5ffd83dbSDimitry Andric uptr stack_end; 29*5ffd83dbSDimitry Andric uptr cache_begin; 30*5ffd83dbSDimitry Andric uptr cache_end; 31*5ffd83dbSDimitry Andric uptr tls_begin; 32*5ffd83dbSDimitry Andric uptr tls_end; 33*5ffd83dbSDimitry Andric DTLS *dtls; 34*5ffd83dbSDimitry Andric }; 35*5ffd83dbSDimitry Andric 36*5ffd83dbSDimitry Andric void ThreadContext::OnStarted(void *arg) { 37*5ffd83dbSDimitry Andric auto args = reinterpret_cast<const OnStartedArgs *>(arg); 38*5ffd83dbSDimitry Andric stack_begin_ = args->stack_begin; 39*5ffd83dbSDimitry Andric stack_end_ = args->stack_end; 40*5ffd83dbSDimitry Andric tls_begin_ = args->tls_begin; 41*5ffd83dbSDimitry Andric tls_end_ = args->tls_end; 42*5ffd83dbSDimitry Andric cache_begin_ = args->cache_begin; 43*5ffd83dbSDimitry Andric cache_end_ = args->cache_end; 44*5ffd83dbSDimitry Andric dtls_ = args->dtls; 45*5ffd83dbSDimitry Andric } 46*5ffd83dbSDimitry Andric 47*5ffd83dbSDimitry Andric void ThreadStart(u32 tid, tid_t os_id, ThreadType thread_type) { 48*5ffd83dbSDimitry Andric OnStartedArgs args; 49*5ffd83dbSDimitry Andric uptr stack_size = 0; 50*5ffd83dbSDimitry Andric uptr tls_size = 0; 51*5ffd83dbSDimitry Andric GetThreadStackAndTls(tid == 0, &args.stack_begin, &stack_size, 52*5ffd83dbSDimitry Andric &args.tls_begin, &tls_size); 53*5ffd83dbSDimitry Andric args.stack_end = args.stack_begin + stack_size; 54*5ffd83dbSDimitry Andric args.tls_end = args.tls_begin + tls_size; 55*5ffd83dbSDimitry Andric GetAllocatorCacheRange(&args.cache_begin, &args.cache_end); 56*5ffd83dbSDimitry Andric args.dtls = DTLS_Get(); 57*5ffd83dbSDimitry Andric ThreadContextLsanBase::ThreadStart(tid, os_id, thread_type, &args); 58*5ffd83dbSDimitry Andric } 59*5ffd83dbSDimitry Andric 60*5ffd83dbSDimitry Andric bool GetThreadRangesLocked(tid_t os_id, uptr *stack_begin, uptr *stack_end, 61*5ffd83dbSDimitry Andric uptr *tls_begin, uptr *tls_end, uptr *cache_begin, 62*5ffd83dbSDimitry Andric uptr *cache_end, DTLS **dtls) { 63*5ffd83dbSDimitry Andric ThreadContext *context = static_cast<ThreadContext *>( 64*5ffd83dbSDimitry Andric GetThreadRegistryLocked()->FindThreadContextByOsIDLocked(os_id)); 65*5ffd83dbSDimitry Andric if (!context) 66*5ffd83dbSDimitry Andric return false; 67*5ffd83dbSDimitry Andric *stack_begin = context->stack_begin(); 68*5ffd83dbSDimitry Andric *stack_end = context->stack_end(); 69*5ffd83dbSDimitry Andric *tls_begin = context->tls_begin(); 70*5ffd83dbSDimitry Andric *tls_end = context->tls_end(); 71*5ffd83dbSDimitry Andric *cache_begin = context->cache_begin(); 72*5ffd83dbSDimitry Andric *cache_end = context->cache_end(); 73*5ffd83dbSDimitry Andric *dtls = context->dtls(); 74*5ffd83dbSDimitry Andric return true; 75*5ffd83dbSDimitry Andric } 76*5ffd83dbSDimitry Andric 77*5ffd83dbSDimitry Andric void InitializeMainThread() { 78*5ffd83dbSDimitry Andric u32 tid = ThreadCreate(0, 0, true); 79*5ffd83dbSDimitry Andric CHECK_EQ(tid, 0); 80*5ffd83dbSDimitry Andric ThreadStart(tid, GetTid()); 81*5ffd83dbSDimitry Andric } 82*5ffd83dbSDimitry Andric 83*5ffd83dbSDimitry Andric static void OnStackUnwind(const SignalContext &sig, const void *, 84*5ffd83dbSDimitry Andric BufferedStackTrace *stack) { 85*5ffd83dbSDimitry Andric stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context, 86*5ffd83dbSDimitry Andric common_flags()->fast_unwind_on_fatal); 87*5ffd83dbSDimitry Andric } 88*5ffd83dbSDimitry Andric 89*5ffd83dbSDimitry Andric void LsanOnDeadlySignal(int signo, void *siginfo, void *context) { 90*5ffd83dbSDimitry Andric HandleDeadlySignal(siginfo, context, GetCurrentThread(), &OnStackUnwind, 91*5ffd83dbSDimitry Andric nullptr); 92*5ffd83dbSDimitry Andric } 93*5ffd83dbSDimitry Andric 94*5ffd83dbSDimitry Andric } // namespace __lsan 95*5ffd83dbSDimitry Andric 96*5ffd83dbSDimitry Andric #endif // SANITIZER_POSIX 97