Always search TIDs for the crashing processes.

base/linux_util.h

 // Copyright (c) 2011 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 BASE_LINUX_UTIL_H_
 #define BASE_LINUX_UTIL_H_
 #pragma once
 
 #include <stdint.h>
 #include <sys/types.h>
@@ skipping 19 matching lines @@
 // Return the inode number for the UNIX domain socket |fd|.
 BASE_API bool FileDescriptorGetInode(ino_t* inode_out, int fd);
 
 // Find the process which holds the given socket, named by inode number. If
 // multiple processes hold the socket, this function returns false.
 BASE_API bool FindProcessHoldingSocket(pid_t* pid_out, ino_t socket_inode);
 
 // For a given process |pid|, look through all its threads and find the first
 // thread with /proc/[pid]/task/[thread_id]/syscall whose first N bytes matches
 // |expected_data|, where N is the length of |expected_data|.
-// Returns the thread id or -1 on error.
+// Returns the thread id or -1 on error.  If |syscall_supported| is
+// set to false the kernel does not support syscall in procfs.
 BASE_API pid_t FindThreadIDWithSyscall(pid_t pid,
-                                       const std::string& expected_data);
+                                       const std::string& expected_data,
+                                       bool* syscall_supported);
 
 }  // namespace base
 
 #endif  // BASE_LINUX_UTIL_H_