deps: V8: backport 76c3ac5 from upstream

This fixes a bug in the CPU profiler where some ticks were attributed
to the wrong file.

Original commit message:
  [cpu-profiler] Fix script name when recording inlining info

  Use the script name from the shared function info to create an
  inline entry. Otherwise functions are attributed to the wrong file
  in the CpuProfileNode.

  See googleapis/cloud-profiler-nodejs#89

  Bug: v8:7203, v8:7241
  Change-Id: I8ea31943741770e6611275a9c93375922b934547
  Reviewed-on: https://chromium-review.googlesource.com/848093
  Reviewed-by: Jaroslav Sevcik <[email protected]>
  Commit-Queue: Franziska Hinkelmann <[email protected]>
  Cr-Commit-Position: refs/heads/master@{#50339}

Refs: v8/v8@76c3ac5
PR-URL: #18298
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>

common.gypi

@@ -27,7 +27,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.19',
+    'v8_embedder_string': '-node.20',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,

deps/v8/src/profiler/profiler-listener.cc

@@ -226,11 +226,18 @@ void ProfilerListener::RecordInliningInfo(CodeEntry* entry,
       SharedFunctionInfo* shared_info = SharedFunctionInfo::cast(
           deopt_input_data->LiteralArray()->get(shared_info_id));
       if (!depth++) continue;  // Skip the current function itself.
-      CodeEntry* inline_entry = new CodeEntry(
-          entry->tag(), GetFunctionName(shared_info->DebugName()),
-          CodeEntry::kEmptyNamePrefix, entry->resource_name(),
-          CpuProfileNode::kNoLineNumberInfo,
-          CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start());
+      const char* resource_name =
+          (shared_info->script()->IsScript() &&
+           Script::cast(shared_info->script())->name()->IsName())
+              ? GetName(Name::cast(Script::cast(shared_info->script())->name()))
+              : CodeEntry::kEmptyResourceName;
+
+      CodeEntry* inline_entry =
+          new CodeEntry(entry->tag(), GetFunctionName(shared_info->DebugName()),
+                        CodeEntry::kEmptyNamePrefix, resource_name,
+                        CpuProfileNode::kNoLineNumberInfo,
+                        CpuProfileNode::kNoColumnNumberInfo, nullptr,
+                        code->instruction_start());
       inline_entry->FillFunctionInfo(shared_info);
       inline_stack.push_back(inline_entry);
     }

deps/v8/test/cctest/test-cpu-profiler.cc

@@ -1745,6 +1745,85 @@ TEST(FunctionDetails) {
                        script_a->GetUnboundScript()->GetId(), 5, 14);
 }
 
+TEST(FunctionDetailsInlining) {
+  if (!CcTest::i_isolate()->use_optimizer() || i::FLAG_always_opt) return;
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::Context> env = CcTest::NewContext(PROFILER_EXTENSION);
+  v8::Context::Scope context_scope(env);
+  ProfilerHelper helper(env);
+
+  // alpha is in a_script, beta in b_script. beta is
+  // inlined in alpha, but it should be attributed to b_script.
+
+  v8::Local<v8::Script> script_b = CompileWithOrigin(
+      "function beta(k) {\n"
+      "  let sum = 2;\n"
+      "  for(let i = 0; i < k; i ++) {\n"
+      "    sum += i;\n"
+      "    sum = sum + 'a';\n"
+      "  }\n"
+      "  return sum;\n"
+      "}\n"
+      "\n",
+      "script_b");
+
+  v8::Local<v8::Script> script_a = CompileWithOrigin(
+      "function alpha(p) {\n"
+      "  let res = beta(p);\n"
+      "  res = res + res;\n"
+      "  return res;\n"
+      "}\n"
+      "let p = 2;\n"
+      "\n"
+      "\n"
+      "// Warm up before profiling or the inlining doesn't happen.\n"
+      "p = alpha(p);\n"
+      "p = alpha(p);\n"
+      "%OptimizeFunctionOnNextCall(alpha);\n"
+      "p = alpha(p);\n"
+      "\n"
+      "\n"
+      "startProfiling();\n"
+      "for(let i = 0; i < 10000; i++) {\n"
+      "  p = alpha(p);\n"
+      "}\n"
+      "stopProfiling();\n"
+      "\n"
+      "\n",
+      "script_a");
+
+  script_b->Run(env).ToLocalChecked();
+  script_a->Run(env).ToLocalChecked();
+
+  const v8::CpuProfile* profile = i::ProfilerExtension::last_profile;
+  const v8::CpuProfileNode* current = profile->GetTopDownRoot();
+  reinterpret_cast<ProfileNode*>(const_cast<v8::CpuProfileNode*>(current))
+      ->Print(0);
+  //   The tree should look like this:
+  //  0  (root) 0 #1
+  //  5    (program) 0 #6
+  //  2     14 #2 script_a:1
+  //    ;;; deopted at script_id: 14 position: 299 with reason 'Insufficient
+  //    type feedback for call'.
+  //  1      alpha 14 #4 script_a:1
+  //  9        beta 13 #5 script_b:0
+  //  0      startProfiling 0 #3
+
+  const v8::CpuProfileNode* root = profile->GetTopDownRoot();
+  const v8::CpuProfileNode* script = GetChild(env, root, "");
+  CheckFunctionDetails(env->GetIsolate(), script, "", "script_a",
+                       script_a->GetUnboundScript()->GetId(), 1, 1);
+  const v8::CpuProfileNode* alpha = FindChild(env, script, "alpha");
+  // Return early if profiling didn't sample alpha.
+  if (!alpha) return;
+  CheckFunctionDetails(env->GetIsolate(), alpha, "alpha", "script_a",
+                       script_a->GetUnboundScript()->GetId(), 1, 15);
+  const v8::CpuProfileNode* beta = FindChild(env, alpha, "beta");
+  if (!beta) return;
+  CheckFunctionDetails(env->GetIsolate(), beta, "beta", "script_b",
+                       script_b->GetUnboundScript()->GetId(), 0, 0);
+}
 
 TEST(DontStopOnFinishedProfileDelete) {
   v8::HandleScope scope(CcTest::isolate());