Mercurial > hg > CbC > CbC_gcc
view libsanitizer/tsan/tsan_interceptors_mach_vm.cpp @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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//===-- tsan_interceptors_mach_vm.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 ThreadSanitizer (TSan), a race detector. // // Interceptors for mach_vm_* user space memory routines on Darwin. //===----------------------------------------------------------------------===// #include "interception/interception.h" #include "tsan_interceptors.h" #include "tsan_platform.h" #include <mach/mach.h> namespace __tsan { static bool intersects_with_shadow(mach_vm_address_t *address, mach_vm_size_t size, int flags) { // VM_FLAGS_FIXED is 0x0, so we have to test for VM_FLAGS_ANYWHERE. if (flags & VM_FLAGS_ANYWHERE) return false; uptr ptr = *address; return !IsAppMem(ptr) || !IsAppMem(ptr + size - 1); } TSAN_INTERCEPTOR(kern_return_t, mach_vm_allocate, vm_map_t target, mach_vm_address_t *address, mach_vm_size_t size, int flags) { SCOPED_TSAN_INTERCEPTOR(mach_vm_allocate, target, address, size, flags); if (target != mach_task_self()) return REAL(mach_vm_allocate)(target, address, size, flags); if (intersects_with_shadow(address, size, flags)) return KERN_NO_SPACE; kern_return_t res = REAL(mach_vm_allocate)(target, address, size, flags); if (res == KERN_SUCCESS) MemoryRangeImitateWriteOrResetRange(thr, pc, *address, size); return res; } TSAN_INTERCEPTOR(kern_return_t, mach_vm_deallocate, vm_map_t target, mach_vm_address_t address, mach_vm_size_t size) { SCOPED_TSAN_INTERCEPTOR(mach_vm_deallocate, target, address, size); if (target != mach_task_self()) return REAL(mach_vm_deallocate)(target, address, size); UnmapShadow(thr, address, size); return REAL(mach_vm_deallocate)(target, address, size); } } // namespace __tsan