Add support for Linux memory mapping stream and remove ELF header usage

src/google_breakpad/processor/proc_maps_linux.h

Index: src/google_breakpad/processor/proc_maps_linux.h
===================================================================
--- src/google_breakpad/processor/proc_maps_linux.h	(revision 0)
+++ src/google_breakpad/processor/proc_maps_linux.h	(working copy)
@@ -0,0 +1,52 @@
+// Copyright (c) 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 BASE_DEBUG_PROC_MAPS_LINUX_H_
+#define BASE_DEBUG_PROC_MAPS_LINUX_H_
+
+#include <string>
+#include <vector>
+
+#include "google_breakpad/common/breakpad_types.h"

[ivanpe, 2015/07/27 18:12:42]

#include "common/using_std_string.h"

[liuandrew, 2015/07/27 23:09:26]

Done.

+
+// Describes a region of mapped memory and the path of the file mapped.

[ivanpe, 2015/07/27 18:12:42]

You should probably put this into the google_breakpad namespace:

namespace google_breakpad {

[liuandrew, 2015/07/27 23:09:26]

Done.

+struct MappedMemoryRegion {
+  enum Permission {
+    READ = 1 << 0,
+    WRITE = 1 << 1,
+    EXECUTE = 1 << 2,
+    PRIVATE = 1 << 3,  // If set, region is private, otherwise it is shared.
+  };
+
+  // The address range [start,end) of mapped memory.
+  uintptr_t start;
+  uintptr_t end;
+
+  // Byte offset into |path| of the range mapped into memory.
+  unsigned long long offset;
+
+  // Bitmask of read/write/execute/private/shared permissions.
+  uint8_t permissions;
+
+  // Major and minor devices.
+  uint8_t major_device;
+  uint8_t minor_device;
+
+  // Value of the inode.
+  long inode;
+
+  // Name of the file mapped into memory.
+  //
+  // NOTE: path names aren't guaranteed to point at valid files. For example,
+  // "[heap]" and "[stack]" are used to represent the location of the process'
+  // heap and stack, respectively.
+  std::string path;

[ivanpe, 2015/07/27 18:12:42]

Please, don't use std::string in breakpad code.  Instead, declare this as
follows:

   sting path;

There is a different string type in Google ::string != std::string.  The
inclusion of common/using_std_string.h should allow you to do this.

[liuandrew, 2015/07/27 23:09:26]

Done.

+};
+
+// Parses /proc/<pid>/maps input data and stores in |regions|. Returns true
+// and updates |regions| if and only if all of |input| was successfully parsed.
+bool ParseProcMaps(const std::string& input,
+                   std::vector<MappedMemoryRegion>* regions);
+
+#endif  // BASE_DEBUG_PROC_MAPS_LINUX_H_