llvm-project/compiler-rt/lib/tsan/rtl/tsan_platform_mac.cc

//===-- tsan_platform_mac.cc ----------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
// Mac-specific code.
//===----------------------------------------------------------------------===//

#include "sanitizer_common/sanitizer_platform.h"
#ifdef __APPLE__

#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_procmaps.h"
#include "tsan_platform.h"
#include "tsan_rtl.h"
#include "tsan_flags.h"

#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <sched.h>

namespace __tsan {

ScopedInRtl::ScopedInRtl() {
}

ScopedInRtl::~ScopedInRtl() {
}

uptr GetShadowMemoryConsumption() {
  return 0;
}

void FlushShadowMemory() {
}

#ifndef TSAN_GO
void InitializeShadowMemory() {
  uptr shadow = (uptr)MmapFixedNoReserve(kLinuxShadowBeg,
    kLinuxShadowEnd - kLinuxShadowBeg);
  if (shadow != kLinuxShadowBeg) {
    Printf("FATAL: ThreadSanitizer can not mmap the shadow memory\n");
    Printf("FATAL: Make sure to compile with -fPIE and "
           "to link with -pie.\n");
    Die();
  }
  DPrintf("kLinuxShadow %zx-%zx (%zuGB)\n",
      kLinuxShadowBeg, kLinuxShadowEnd,
      (kLinuxShadowEnd - kLinuxShadowBeg) >> 30);
  DPrintf("kLinuxAppMem %zx-%zx (%zuGB)\n",
      kLinuxAppMemBeg, kLinuxAppMemEnd,
      (kLinuxAppMemEnd - kLinuxAppMemBeg) >> 30);
}
#endif

const char *InitializePlatform() {
  void *p = 0;
  if (sizeof(p) == 8) {
    // Disable core dumps, dumping of 16TB usually takes a bit long.
    // The following magic is to prevent clang from replacing it with memset.
    volatile rlimit lim;
    lim.rlim_cur = 0;
    lim.rlim_max = 0;
    setrlimit(RLIMIT_CORE, (rlimit*)&lim);
  }

  return GetEnv(kTsanOptionsEnv);
}

void FinalizePlatform() {
  fflush(0);
}

void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                          uptr *tls_addr, uptr *tls_size) {
  *stk_addr = 0;
  *stk_size = 0;
  *tls_addr = 0;
  *tls_size = 0;
}

}  // namespace __tsan

#endif  // #ifdef __APPLE__