Enable dumping of the Linux extension streams.

We now dump information about process's environment/command line/status, Linux release, and CPU info.
Review URL: http://breakpad.appspot.com/238001

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@738 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/minidump_dump.cc

@@ -33,9 +33,12 @@
 // Author: Mark Mentovai
 
 #include <stdio.h>
+#include <string.h>
 
+#include "client/linux/minidump_writer/minidump_extension_linux.h"
 #include "google_breakpad/processor/minidump.h"
 #include "processor/logging.h"
+#include "processor/scoped_ptr.h"
 
 namespace {
 
@@ -49,6 +52,42 @@ using google_breakpad::MinidumpSystemInfo;
 using google_breakpad::MinidumpMiscInfo;
 using google_breakpad::MinidumpBreakpadInfo;
 
+static void DumpRawStream(Minidump *minidump,
+                          u_int32_t stream_type,
+                          const char *stream_name,
+                          int *errors) {
+  u_int32_t length = 0;
+  if (!minidump->SeekToStreamType(stream_type, &length)) {
+    return;
+  }
+
+  printf("Stream %s:\n", stream_name);
+
+  if (length == 0) {
+    printf("\n");
+    return;
+  }
+  std::vector<char> contents(length);
+  if (!minidump->ReadBytes(&contents[0], length)) {
+    ++*errors;
+    BPLOG(ERROR) << "minidump.ReadBytes failed";
+    return;
+  }
+  size_t current_offset = 0;
+  while (current_offset < length) {
+    size_t remaining = length - current_offset;
+    printf("%.*s", remaining, &contents[current_offset]);
+    char *next_null = reinterpret_cast<char *>(
+        memchr(&contents[current_offset], 0, remaining));
+    if (next_null == NULL)
+      break;
+    printf("\\0\n");
+    size_t null_offset = next_null - &contents[0];
+    current_offset = null_offset + 1;
+  }
+  printf("\n\n");
+}
+
 static bool PrintMinidumpDump(const char *minidump_file) {
   Minidump minidump(minidump_file);
   if (!minidump.Read()) {
@@ -121,6 +160,27 @@ static bool PrintMinidumpDump(const char *minidump_file) {
     breakpad_info->Print();
   }
 
+  DumpRawStream(&minidump,
+                MD_LINUX_CMD_LINE,
+                "MD_LINUX_CMD_LINE",
+                &errors);
+  DumpRawStream(&minidump,
+                MD_LINUX_ENVIRON,
+                "MD_LINUX_ENVIRON",
+                &errors);
+  DumpRawStream(&minidump,
+                MD_LINUX_LSB_RELEASE,
+                "MD_LINUX_LSB_RELEASE",
+                &errors);
+  DumpRawStream(&minidump,
+                MD_LINUX_PROC_STATUS,
+                "MD_LINUX_PROC_STATUS",
+                &errors);
+  DumpRawStream(&minidump,
+                MD_LINUX_CPU_INFO,
+                "MD_LINUX_CPU_INFO",
+                &errors);
+
   return errors == 0;
 }