Log V8 version in profiler log file

Patch from issue 800293002 authored by ben@strongloop.com

TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/806143002

Cr-Commit-Position: refs/heads/master@{#25835}

src/log-utils.cc

@@ -6,6 +6,7 @@
 
 #include "src/log-utils.h"
 #include "src/string-stream.h"
+#include "src/version.h"
 
 namespace v8 {
 namespace internal {
@@ -49,6 +50,14 @@ void Log::Initialize(const char* log_file_name) {
     } else {
       OpenFile(log_file_name);
     }
+
+    if (output_handle_ != nullptr) {
+      Log::MessageBuilder msg(this);
+      msg.Append("v8-version,%d,%d,%d,%d,%d", Version::GetMajor(),
+                 Version::GetMinor(), Version::GetBuild(), Version::GetPatch(),
+                 Version::IsCandidate());
+      msg.WriteToLogFile();
+    }
   }
 }
 

test/cctest/test-log.cc

@@ -42,6 +42,7 @@
 #include "src/natives.h"
 #include "src/utils.h"
 #include "src/v8threads.h"
+#include "src/version.h"
 #include "src/vm-state-inl.h"
 #include "test/cctest/cctest.h"
 
@@ -507,3 +508,23 @@ TEST(EquivalenceOfLoggingAndTraversal) {
   }
   isolate->Dispose();
 }
+
+
+TEST(LogVersion) {
+  v8::Isolate* isolate;
+  {
+    ScopedLoggerInitializer initialize_logger;
+    isolate = initialize_logger.isolate();
+    bool exists = false;
+    i::Vector<const char> log(
+        i::ReadFile(initialize_logger.StopLoggingGetTempFile(), &exists, true));
+    CHECK(exists);
+    i::EmbeddedVector<char, 100> ref_data;
+    i::SNPrintF(ref_data, "v8-version,%d,%d,%d,%d,%d", i::Version::GetMajor(),
+                i::Version::GetMinor(), i::Version::GetBuild(),
+                i::Version::GetPatch(), i::Version::IsCandidate());
+    CHECK_NE(NULL, StrNStr(log.start(), ref_data.start(), log.length()));
+    log.Dispose();
+  }
+  isolate->Dispose();
+}