deps: backport aa6ce3e from upstream V8

Original commit message:

    [log][api] introduce public CodeEventListener API

    Introduce a new public API called CodeEventListener to allow
    embedders to better support external profilers and other diagnostic
    tools without relying on unsupported methods like --perf-basic-prof.

    Bug: v8:7694
    Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    Change-Id: I063cc965394d59401358757634c9ea84c11517e9
    Co-authored-by: Daniel Beckert <daniel@sthima.com.br>
    Reviewed-on: https://chromium-review.googlesource.com/1028770
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Reviewed-by: Hannes Payer <hpayer@chromium.org>
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Reviewed-by: Andreas Haas <ahaas@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#53382}

Refs: https://github.com/v8/v8/commit/aa6ce3ee617b2f324bea3a5d8e3263aee

PR-URL: https://github.com/nodejs/node/pull/21126
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/deps/v8/test/cctest/test-log.cc b/deps/v8/test/cctest/test-log.cc
index c9a521fcae..3f8b0a5178 100644
--- a/deps/v8/test/cctest/test-log.cc
+++ b/deps/v8/test/cctest/test-log.cc
@@ -35,6 +35,7 @@
 #endif  // __linux__
 
 #include <unordered_set>
+#include <vector>
 #include "src/api.h"
 #include "src/log-utils.h"
 #include "src/log.h"
@@ -251,6 +252,38 @@ class ScopedLoggerInitializer {
   DISALLOW_COPY_AND_ASSIGN(ScopedLoggerInitializer);
 };
 
+class TestCodeEventHandler : public v8::CodeEventHandler {
+ public:
+  explicit TestCodeEventHandler(v8::Isolate* isolate)
+      : v8::CodeEventHandler(isolate) {}
+
+  const char* FindLine(const char* prefix, const char* suffix = nullptr,
+                       const char* start = nullptr) {
+    if (!log_.length()) return NULL;
+    const char* c_log = log_.c_str();
+    if (start == nullptr) start = c_log;
+    const char* end = c_log + log_.length();
+    return FindLogLine(start, end, prefix, suffix);
+  }
+
+  void Handle(v8::CodeEvent* code_event) override {
+    const char* code_type =
+        v8::CodeEvent::GetCodeEventTypeName(code_event->GetCodeType());
+    char function_name[1000];
+    strncpy(function_name, code_type, 1000);
+    function_name[strlen(code_type)] = ' ';
+    code_event->GetFunctionName()->WriteUtf8(
+        function_name + strlen(code_type) + 1, 1000);
+    function_name[strlen(function_name) + 1] = '\0';
+    function_name[strlen(function_name)] = '\n';
+
+    log_ += std::string(function_name);
+  }
+
+ private:
+  std::string log_;
+};
+
 }  // namespace
 
 TEST(FindLogLine) {
@@ -801,6 +834,48 @@ TEST(LogInterpretedFramesNativeStack) {
   isolate->Dispose();
 }
 
+TEST(ExternalCodeEventListener) {
+  i::FLAG_log = false;
+  i::FLAG_prof = false;
+
+  v8::Isolate::CreateParams create_params;
+  create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
+  v8::Isolate* isolate = v8::Isolate::New(create_params);
+
+  {
+    v8::HandleScope scope(isolate);
+    v8::Isolate::Scope isolate_scope(isolate);
+    v8::Local<v8::Context> context = v8::Context::New(isolate);
+    context->Enter();
+
+    TestCodeEventHandler code_event_handler(isolate);
+
+    const char* source_text_before_start =
+        "function testCodeEventListenerBeforeStart(a,b) { return a + b };"
+        "testCodeEventListenerBeforeStart('1', 1);";
+    CompileRun(source_text_before_start);
+
+    CHECK_NULL(code_event_handler.FindLine("LazyCompile",
+                                           "testCodeEventListenerBeforeStart"));
+
+    code_event_handler.Enable();
+
+    CHECK_NOT_NULL(code_event_handler.FindLine(
+        "LazyCompile", "testCodeEventListenerBeforeStart"));
+
+    const char* source_text_after_start =
+        "function testCodeEventListenerAfterStart(a,b) { return a + b };"
+        "testCodeEventListenerAfterStart('1', 1);";
+    CompileRun(source_text_after_start);
+
+    CHECK_NOT_NULL(code_event_handler.FindLine(
+        "LazyCompile", "testCodeEventListenerAfterStart"));
+
+    context->Exit();
+  }
+  isolate->Dispose();
+}
+
 TEST(TraceMaps) {
   SETUP_FLAGS();
   i::FLAG_trace_maps = true;