Fix compilation of server.cc on hpux.
[official-gcc.git] / libsanitizer / tsan / tsan_interceptors_mach_vm.cpp
blob6d62ff6a83825e8bf20904e1b8eb5055d2893584
1 //===-- tsan_interceptors_mach_vm.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 ThreadSanitizer (TSan), a race detector.
11 // Interceptors for mach_vm_* user space memory routines on Darwin.
12 //===----------------------------------------------------------------------===//
14 #include "interception/interception.h"
15 #include "tsan_interceptors.h"
16 #include "tsan_platform.h"
18 #include <mach/mach.h>
20 namespace __tsan {
22 static bool intersects_with_shadow(mach_vm_address_t address,
23 mach_vm_size_t size, int flags) {
24 // VM_FLAGS_FIXED is 0x0, so we have to test for VM_FLAGS_ANYWHERE.
25 if (flags & VM_FLAGS_ANYWHERE) return false;
26 return !IsAppMem(address) || !IsAppMem(address + size - 1);
29 TSAN_INTERCEPTOR(kern_return_t, mach_vm_allocate, vm_map_t target,
30 mach_vm_address_t *address, mach_vm_size_t size, int flags) {
31 SCOPED_TSAN_INTERCEPTOR(mach_vm_allocate, target, address, size, flags);
32 if (target != mach_task_self())
33 return REAL(mach_vm_allocate)(target, address, size, flags);
34 if (address && intersects_with_shadow(*address, size, flags))
35 return KERN_NO_SPACE;
36 kern_return_t kr = REAL(mach_vm_allocate)(target, address, size, flags);
37 if (kr == KERN_SUCCESS)
38 MemoryRangeImitateWriteOrResetRange(thr, pc, *address, size);
39 return kr;
42 TSAN_INTERCEPTOR(kern_return_t, mach_vm_deallocate, vm_map_t target,
43 mach_vm_address_t address, mach_vm_size_t size) {
44 SCOPED_TSAN_INTERCEPTOR(mach_vm_deallocate, target, address, size);
45 if (target != mach_task_self())
46 return REAL(mach_vm_deallocate)(target, address, size);
47 kern_return_t kr = REAL(mach_vm_deallocate)(target, address, size);
48 if (kr == KERN_SUCCESS && address)
49 UnmapShadow(thr, address, size);
50 return kr;
53 } // namespace __tsan