Profiler Take 2

runtime/bin/file_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/file.h"
 
 #include <errno.h>  // NOLINT
 #include <fcntl.h>  // NOLINT
 #include <copyfile.h>  // NOLINT
 #include <sys/stat.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 #include <libgen.h>  // NOLINT
 #include <limits.h>  // NOLINT
 
 #include "bin/builtin.h"
 #include "bin/fdutils.h"
 #include "bin/log.h"
-
+#include "bin/signal_blocker.h"
 
 namespace dart {
 namespace bin {
 
 class FileHandle {
  public:
   explicit FileHandle(int fd) : fd_(fd) { }
   ~FileHandle() { }
   int fd() const { return fd_; }
   void set_fd(int fd) { fd_ = fd; }
@@ skipping 27 matching lines @@
 }
 
 
 bool File::IsClosed() {
   return handle_->fd() == kClosedFd;
 }
 
 
 int64_t File::Read(void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   return TEMP_FAILURE_RETRY(read(handle_->fd(), buffer, num_bytes));
 }
 
 
 int64_t File::Write(const void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   return TEMP_FAILURE_RETRY(write(handle_->fd(), buffer, num_bytes));
 }
 
 
 off64_t File::Position() {
   ASSERT(handle_->fd() >= 0);
   return lseek(handle_->fd(), 0, SEEK_CUR);
 }
 
 
@@ skipping 287 matching lines @@
   return (file_1_info.st_ino == file_2_info.st_ino &&
           file_1_info.st_dev == file_2_info.st_dev) ?
       File::kIdentical :
       File::kDifferent;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)