[microdump] Add build fingerprint and product info metadata.

src/client/linux/microdump_writer/microdump_writer_unittest.cc

Index: src/client/linux/microdump_writer/microdump_writer_unittest.cc
diff --git a/src/client/linux/microdump_writer/microdump_writer_unittest.cc b/src/client/linux/microdump_writer/microdump_writer_unittest.cc
index 52b1d9a9756b3968746e9093fe36ee2fb1c00a03..1fa6f1ff0a27ecb9c2202086173dc74fe7c5b4be 100644
--- a/src/client/linux/microdump_writer/microdump_writer_unittest.cc
+++ b/src/client/linux/microdump_writer/microdump_writer_unittest.cc
@@ -48,7 +48,11 @@ 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));
 
@@ -73,6 +77,36 @@ TEST(MicrodumpWriterTest, Setup) {
   // 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";
@@ -93,28 +127,8 @@ TEST(MicrodumpWriterTest, Setup) {
   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(
@@ -126,8 +140,25 @@ TEST(MicrodumpWriterTest, Setup) {
       "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