Add retry logic for FindThreadIDWithSyscall()

components/crash/content/browser/crash_handler_host_linux.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
 #define COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_HANDLER_HOST_LINUX_H_
 
 #include <sys/types.h>
 
 #include <string>
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "components/crash/content/app/breakpad_linux_impl.h"
 
 namespace base {
 class Thread;
 }
 
 namespace breakpad {
 
 struct BreakpadInfo;
 
 // This is the host for processes which run breakpad inside the sandbox on
@@ skipping 36 matching lines @@
 
   // Do work in a sequenced worker pool for OnFileCanReadWithoutBlocking().
   void WriteDumpFile(std::unique_ptr<BreakpadInfo> info,
                      std::unique_ptr<char[]> crash_context,
                      pid_t crashing_pid,
                      int signal_fd);
 
   // Continue OnFileCanReadWithoutBlocking()'s work on the IO thread.
   void QueueCrashDumpTask(std::unique_ptr<BreakpadInfo> info, int signal_fd);
 
+  // Find crashing thread (may delay and retry) and dump on IPC thread.
+  void FindCrashingThreadAndDump(pid_t crashing_pid,
+                                 const std::string& expected_syscall_data,
+                                 std::unique_ptr<char[]> crash_context,
+                                 std::unique_ptr<CrashKeyStorage> crash_keys,
+#if defined(ADDRESS_SANITIZER)
+                                 std::unique_ptr<char[]> asan_report,
+#endif
+                                 uint64_t uptime,
+                                 size_t oom_size,
+                                 int signal_fd,
+                                 int attempt);
+
   std::string process_type_;
   base::FilePath dumps_path_;
 #if !defined(OS_ANDROID)
   bool upload_;
 #endif
 
   int process_socket_;
   int browser_socket_;
 
   base::MessageLoopForIO::FileDescriptorWatcher file_descriptor_watcher_;
   std::unique_ptr<base::Thread> uploader_thread_;
   bool shutting_down_;
 
   // Unique sequence token so that writing crash dump won't be blocked
   // by other tasks.
   base::SequencedWorkerPool::SequenceToken worker_pool_token_;
 
   DISALLOW_COPY_AND_ASSIGN(CrashHandlerHostLinux);
 };
 
 }  // namespace breakpad
 
 #endif  // COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_HANDLER_HOST_LINUX_H_