[microdump] Add build fingerprint and product info metadata.

src/client/linux/microdump_writer/microdump_writer_unittest.cc

 // Copyright (c) 2014 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 #include "common/scoped_ptr.h"
 #include "common/tests/auto_tempdir.h"
 #include "common/using_std_string.h"
 
 using namespace google_breakpad;
 
 namespace {
 
 typedef testing::Test MicrodumpWriterTest;
 
-TEST(MicrodumpWriterTest, Setup) {
+void CrashAndGetMicrodump(
+    const MappingList& mappings,
+    const char* build_fingerprint,
+    const char* product_info,
+    scoped_array<char>* buf) {
   int fds[2];
   ASSERT_NE(-1, pipe(fds));
 
   AutoTempDir temp_dir;
   string stderr_file = temp_dir.path() + "/stderr.log";
   int err_fd = open(stderr_file.c_str(), O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
   ASSERT_NE(-1, err_fd);
 
   const pid_t child = fork();
   if (child == 0) {
     close(fds[1]);
     char b;
     IGNORE_RET(HANDLE_EINTR(read(fds[0], &b, sizeof(b))));
     close(fds[0]);
     syscall(__NR_exit);
   }
   close(fds[0]);
 
   ExceptionHandler::CrashContext context;
   memset(&context, 0, sizeof(context));
 
   // Set a non-zero tid to avoid tripping asserts.
   context.tid = child;
 
+  // Redirect temporarily stderr to the stderr.log file.
+  int save_err = dup(STDERR_FILENO);
+  ASSERT_NE(-1, save_err);
+  ASSERT_NE(-1, dup2(err_fd, STDERR_FILENO));
+
+  ASSERT_TRUE(WriteMicrodump(child, &context, sizeof(context), mappings,
+      build_fingerprint, product_info));
+
+  // Revert stderr back to the console.
+  dup2(save_err, STDERR_FILENO);
+  close(save_err);
+
+  // Read back the stderr file and check for the microdump marker.
+  fsync(err_fd);
+  lseek(err_fd, 0, SEEK_SET);
+  const size_t kBufSize = 64 * 1024;
+  buf->reset(new char[kBufSize]);
+  ASSERT_GT(read(err_fd, buf->get(), kBufSize), 0);
+
+  close(err_fd);
+  close(fds[1]);
+
+  ASSERT_NE(static_cast<char*>(0), strstr(
+      buf->get(), "-----BEGIN BREAKPAD MICRODUMP-----"));
+  ASSERT_NE(static_cast<char*>(0), strstr(
+      buf->get(), "-----END BREAKPAD MICRODUMP-----"));
+
+}
+
+TEST(MicrodumpWriterTest, BasicWithMappings) {
   // Push some extra mapping to check the MappingList logic.
   const uint32_t memory_size = sysconf(_SC_PAGESIZE);
   const char* kMemoryName = "libfoo.so";
   const uint8_t kModuleGUID[sizeof(MDGUID)] = {
      0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
      0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
   };
 
   MappingInfo info;
   info.start_addr = memory_size;
   info.size = memory_size;
   info.offset = 42;
   strcpy(info.name, kMemoryName);
 
   MappingList mappings;
   MappingEntry mapping;
   mapping.first = info;
   memcpy(mapping.second, kModuleGUID, sizeof(MDGUID));
   mappings.push_back(mapping);
 
-  // Redirect temporarily stderr to the stderr.log file.
-  int save_err = dup(STDERR_FILENO);
-  ASSERT_NE(-1, save_err);
-  ASSERT_NE(-1, dup2(err_fd, STDERR_FILENO));
-
-  ASSERT_TRUE(WriteMicrodump(child, &context, sizeof(context), mappings));
-
-  // Revert stderr back to the console.
-  dup2(save_err, STDERR_FILENO);
-  close(save_err);
-
-  // Read back the stderr file and check for the microdump marker.
-  fsync(err_fd);
-  lseek(err_fd, 0, SEEK_SET);
-  const size_t kBufSize = 64 * 1024;
-  scoped_array<char> buf(new char[kBufSize]);
-  ASSERT_GT(read(err_fd, buf.get(), kBufSize), 0);
-
-  ASSERT_NE(static_cast<char*>(0), strstr(
-      buf.get(), "-----BEGIN BREAKPAD MICRODUMP-----"));
-  ASSERT_NE(static_cast<char*>(0), strstr(
-      buf.get(), "-----END BREAKPAD MICRODUMP-----"));
+  scoped_array<char> buf;
+  CrashAndGetMicrodump(mappings, NULL, NULL, &buf);
 
 #ifdef __LP64__
   ASSERT_NE(static_cast<char*>(0), strstr(
       buf.get(), "M 0000000000001000 000000000000002A 0000000000001000 "
       "33221100554477668899AABBCCDDEEFF0 libfoo.so"));
 #else
   ASSERT_NE(static_cast<char*>(0), strstr(
       buf.get(), "M 00001000 0000002A 00001000 "
       "33221100554477668899AABBCCDDEEFF0 libfoo.so"));
 #endif
 
-  close(err_fd);
-  close(fds[1]);
+  // In absence of a product info in the minidump, the writer should just write
+  // an unknown marker.
+  ASSERT_NE(static_cast<char*>(0), strstr(
+      buf.get(), "V UNKNOWN:0.0.0.0"));
+}
+
+// Ensure that the product info and build fingerprint metadata show up in the
+// final microdump if present.
+TEST(MicrodumpWriterTest, BuildFingerprintAndProductInfo) {
+  const char kProductInfo[] = "MockProduct:42.0.2311.99";
+  const char kBuildFingerprint[] =
+      "aosp/occam/mako:5.1.1/LMY47W/12345678:userdegbug/dev-keys";
+  scoped_array<char> buf;
+  MappingList no_mappings;
+
+  CrashAndGetMicrodump(no_mappings, kBuildFingerprint, kProductInfo, &buf);
+
+  ASSERT_NE(static_cast<char*>(0), strstr(buf.get(), kBuildFingerprint));
+  ASSERT_NE(static_cast<char*>(0), strstr(buf.get(), kProductInfo));
 }
 
 }  // namespace