[profiler] Include the generic js-to-wasm builtin in profiles

This CL fixes two things:
1) It properly creates code entries for the generic js-to-wasm builtin
(others are left out because we don't want to include all builtins in
profiles).
2) It includes js-to-wasm frames in profiles. The generic js-to-wasm
builtin will map to that frame type in the future (see referenced
bug). js-to-wasm frames are currently included because they are wrongly
mapped to OPTIMIZED frames by the SafeStackTraceIterator.

R=petermarshall@chromium.org
CC=ahaas@chromium.org, evih@google.com

Bug: v8:10701
Change-Id: I26e3fa6901890e041feab7c001069e67a616c986
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2416495Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70095}

src/execution/frames-inl.h

@@ -335,7 +335,7 @@ inline StackFrame* SafeStackFrameIterator::frame() const {
   DCHECK(!done());
   DCHECK(frame_->is_java_script() || frame_->is_exit() ||
          frame_->is_builtin_exit() || frame_->is_wasm() ||
-         frame_->is_wasm_to_js());
+         frame_->is_wasm_to_js() || frame_->is_js_to_wasm());
   return frame_;
 }
 

src/execution/frames.cc

@@ -458,7 +458,7 @@ void SafeStackFrameIterator::Advance() {
       external_callback_scope_ = external_callback_scope_->previous();
     }
     if (frame_->is_java_script() || frame_->is_wasm() ||
-        frame_->is_wasm_to_js()) {
+        frame_->is_wasm_to_js() || frame_->is_js_to_wasm()) {
       break;
     }
     if (frame_->is_exit() || frame_->is_builtin_exit()) {

src/execution/frames.h

@@ -205,6 +205,7 @@ class StackFrame {
            (type == JAVA_SCRIPT_BUILTIN_CONTINUATION_WITH_CATCH);
   }
   bool is_wasm_to_js() const { return type() == WASM_TO_JS; }
+  bool is_js_to_wasm() const { return type() == JS_TO_WASM; }
 
   // Accessors.
   Address sp() const { return state_.sp; }

src/profiler/cpu-profiler-inl.h

@@ -45,12 +45,15 @@ void CodeDeoptEventRecord::UpdateCodeMap(CodeMap* code_map) {
 
 void ReportBuiltinEventRecord::UpdateCodeMap(CodeMap* code_map) {
   CodeEntry* entry = code_map->FindEntry(instruction_start);
-  if (!entry) {
-    // Code objects for builtins should already have been added to the map but
-    // some of them have been filtered out by CpuProfiler.
-    return;
-  }
+  if (entry) {
     entry->SetBuiltinId(builtin_id);
+  } else if (builtin_id == Builtins::kGenericJSToWasmWrapper) {
+    // Make sure to add the generic js-to-wasm wrapper builtin, because that
+    // one is supposed to show up in profiles.
+    entry = new CodeEntry(CodeEventListener::BUILTIN_TAG,
+                          Builtins::name(builtin_id));
+    code_map->AddCode(instruction_start, entry, instruction_size);
+  }
 }
 
 TickSample* SamplingEventsProcessor::StartTickSample() {

src/profiler/cpu-profiler.cc

@@ -359,7 +359,9 @@ void ProfilerCodeObserver::LogBuiltins() {
     CodeEventsContainer evt_rec(CodeEventRecord::REPORT_BUILTIN);
     ReportBuiltinEventRecord* rec = &evt_rec.ReportBuiltinEventRecord_;
     Builtins::Name id = static_cast<Builtins::Name>(i);
-    rec->instruction_start = builtins->builtin(id).InstructionStart();
+    Code code = builtins->builtin(id);
+    rec->instruction_start = code.InstructionStart();
+    rec->instruction_size = code.InstructionSize();
     rec->builtin_id = id;
     CodeEventHandlerInternal(evt_rec);
   }

src/profiler/cpu-profiler.h

@@ -92,6 +92,7 @@ class CodeDeoptEventRecord : public CodeEventRecord {
 class ReportBuiltinEventRecord : public CodeEventRecord {
  public:
   Address instruction_start;
+  unsigned instruction_size;
   Builtins::Name builtin_id;
 
   V8_INLINE void UpdateCodeMap(CodeMap* code_map);