[debugger] implement inspector-facing API for code coverage.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 17 matching lines @@
 #include "src/base/utils/random-number-generator.h"
 #include "src/bootstrapper.h"
 #include "src/char-predicates-inl.h"
 #include "src/code-stubs.h"
 #include "src/compiler-dispatcher/compiler-dispatcher.h"
 #include "src/compiler.h"
 #include "src/context-measure.h"
 #include "src/contexts.h"
 #include "src/conversions-inl.h"
 #include "src/counters.h"
+#include "src/debug/debug-coverage.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/execution.h"
 #include "src/frames-inl.h"
 #include "src/gdb-jit.h"
 #include "src/global-handles.h"
 #include "src/globals.h"
 #include "src/icu_util.h"
 #include "src/isolate-inl.h"
 #include "src/json-parser.h"
@@ skipping 9446 matching lines @@
     return ToApiHandle<String>(name);
   } else {
     // We do not expect this to fail. Change this if it does.
     i::Handle<i::String> cons = isolate->factory()->NewConsString(
         isolate->factory()->InternalizeUtf8String(entry->name_prefix()),
         name).ToHandleChecked();
     return ToApiHandle<String>(cons);
   }
 }
 
+debug::Coverage::Range::Range(i::CoverageRange* range,
+                              Local<debug::Script> script)
+    : range_(range), script_(script) {
+  i::Handle<i::Script> i_script = v8::Utils::OpenHandle(*script);
+  i::Script::PositionInfo start;
+  i::Script::PositionInfo end;
+  i::Script::GetPositionInfo(i_script, range->start, &start,
+                             i::Script::WITH_OFFSET);
+  i::Script::GetPositionInfo(i_script, range->end, &end,
+                             i::Script::WITH_OFFSET);
+  start_ = Location(start.line, start.column);
+  end_ = Location(end.line, end.column);
+}
+
+uint32_t debug::Coverage::Range::Count() { return range_->count; }
+
+size_t debug::Coverage::Range::NestedCount() { return range_->inner.size(); }
+
+debug::Coverage::Range debug::Coverage::Range::GetNested(size_t i) {
+  return Range(&range_->inner[i], script_);
+}
+
+MaybeLocal<String> debug::Coverage::Range::Name() {
+  return ToApiHandle<String>(range_->name);
+}
+
+debug::Coverage::~Coverage() { delete coverage_; }
+
+size_t debug::Coverage::ScriptCount() { return coverage_->size(); }
+
+Local<debug::Script> debug::Coverage::GetScript(size_t i) {
+  return ToApiHandle<debug::Script>(coverage_->at(i).script);
+}
+
+debug::Coverage::Range debug::Coverage::GetRange(size_t i) {
+  return Range(&coverage_->at(i).toplevel, GetScript(i));
+}
+
+debug::Coverage debug::Coverage::Collect(Isolate* isolate) {
+  return Coverage(i::Coverage::Collect(reinterpret_cast<i::Isolate*>(isolate)));
+}
+
+void debug::Coverage::TogglePrecise(Isolate* isolate, bool enable) {
+  i::Coverage::TogglePrecise(reinterpret_cast<i::Isolate*>(isolate), enable);
+}
+
 const char* CpuProfileNode::GetFunctionNameStr() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   return node->entry()->name();
 }
 
 int CpuProfileNode::GetScriptId() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   const i::CodeEntry* entry = node->entry();
   return entry->script_id();
 }
@@ skipping 655 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8