Update Crashpad to 1f28a123a4c9449e3d7ddad4ff00dacd366d5216

third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc

Index: third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc
diff --git a/third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc b/third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09e3fba56c9ab181cb8698030bcfdb8211865d79
--- /dev/null
+++ b/third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc
@@ -0,0 +1,62 @@
+// Copyright 2017 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "util/linux/scoped_ptrace_attach.h"
+
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+
+#include "base/logging.h"
+#include "base/posix/eintr_wrapper.h"
+
+namespace crashpad {
+
+ScopedPtraceAttach::ScopedPtraceAttach()
+    : pid_(-1) {}
+
+ScopedPtraceAttach::~ScopedPtraceAttach() {
+  Reset();
+}
+
+bool ScopedPtraceAttach::Reset() {
+  if (pid_ >= 0 && ptrace(PTRACE_DETACH, pid_, nullptr, nullptr) != 0) {
+    PLOG(ERROR) << "ptrace";
+    return false;
+  }
+  pid_ = -1;
+  return true;
+}
+
+bool ScopedPtraceAttach::ResetAttach(pid_t pid) {
+  Reset();
+
+  if (ptrace(PTRACE_ATTACH, pid, nullptr, nullptr) != 0) {
+    PLOG(ERROR) << "ptrace";
+    return false;
+  }
+  pid_ = pid;
+
+  int status;
+  if (HANDLE_EINTR(waitpid(pid_, &status, __WALL)) < 0) {
+    PLOG(ERROR) << "waitpid";
+    return false;
+  }
+  if (!WIFSTOPPED(status)) {
+    LOG(ERROR) << "process not stopped";
+    return false;
+  }
+  return true;
+}
+
+}  // namespace crashpad