[coverage] Block coverage with support for IfStatements

src/compilation-info.h

 // Copyright 2016 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.
 
 #ifndef V8_COMPILATION_INFO_H_
 #define V8_COMPILATION_INFO_H_
 
 #include <memory>
 
 #include "src/compilation-dependencies.h"
 #include "src/frames.h"
 #include "src/globals.h"
 #include "src/handles.h"
 #include "src/objects.h"
 #include "src/source-position-table.h"
 #include "src/utils.h"
 #include "src/vector.h"
 
 namespace v8 {
 namespace internal {
 
+class CoverageInfo;
 class DeclarationScope;
 class DeferredHandles;
 class FunctionLiteral;
 class JavaScriptFrame;
 class ParseInfo;
 class Isolate;
 class Zone;
 
 // CompilationInfo encapsulates some information known at compile time.  It
 // is constructed based on the resources available at compile-time.
@@ skipping 12 matching lines @@
     kFunctionContextSpecializing = 1 << 7,
     kFrameSpecializing = 1 << 8,
     kInliningEnabled = 1 << 9,
     kDisableFutureOptimization = 1 << 10,
     kSplittingEnabled = 1 << 11,
     kDeoptimizationEnabled = 1 << 12,
     kSourcePositionsEnabled = 1 << 13,
     kBailoutOnUninitialized = 1 << 14,
     kOptimizeFromBytecode = 1 << 15,
     kLoopPeelingEnabled = 1 << 16,
+    kBlockCoverageEnabled = 1 << 17,
   };
 
   CompilationInfo(Zone* zone, ParseInfo* parse_info, Isolate* isolate,
                   Handle<JSFunction> closure);
   CompilationInfo(Vector<const char> debug_name, Isolate* isolate, Zone* zone,
                   Code::Flags code_flags);
   ~CompilationInfo();
 
   ParseInfo* parse_info() const { return parse_info_; }
 
@@ skipping 108 matching lines @@
   void MarkAsOptimizeFromBytecode() { SetFlag(kOptimizeFromBytecode); }
 
   bool is_optimizing_from_bytecode() const {
     return GetFlag(kOptimizeFromBytecode);
   }
 
   void MarkAsLoopPeelingEnabled() { SetFlag(kLoopPeelingEnabled); }
 
   bool is_loop_peeling_enabled() const { return GetFlag(kLoopPeelingEnabled); }
 
+  void MarkAsBlockCoverageEnabled() { SetFlag(kBlockCoverageEnabled); }
+
+  bool is_block_coverage_enabled() const {
+    return GetFlag(kBlockCoverageEnabled);
+  }
+
   bool GeneratePreagedPrologue() const {
     // Generate a pre-aged prologue if we are optimizing for size, which
     // will make code old more aggressive. Only apply to Code::FUNCTION,
     // since only functions are aged in the compilation cache.
     return FLAG_optimize_for_size && FLAG_age_code && !is_debug() &&
            output_code_kind() == Code::FUNCTION;
   }
 
   void SetCode(Handle<Code> code) { code_ = code; }
 
@@ skipping 113 matching lines @@
   std::unique_ptr<char[]> GetDebugName() const;
 
   Code::Kind output_code_kind() const;
 
   StackFrame::Type GetOutputStackFrameType() const;
 
   int GetDeclareGlobalsFlags() const;
 
   SourcePositionTableBuilder::RecordingMode SourcePositionRecordingMode() const;
 
+  bool has_coverage_info() const { return !coverage_info_.is_null(); }
+  Handle<CoverageInfo> coverage_info() const { return coverage_info_; }
+  void set_coverage_info(Handle<CoverageInfo> coverage_info) {
+    coverage_info_ = coverage_info;
+  }
+
  private:
   // Compilation mode.
   // BASE is generated by the full codegen, optionally prepared for bailouts.
   // OPTIMIZE is optimized code generated by the Hydrogen-based backend.
   enum Mode { BASE, OPTIMIZE, STUB };
 
   CompilationInfo(ParseInfo* parse_info, Vector<const char> debug_name,
                   Code::Flags code_flags, Mode mode, Isolate* isolate,
                   Zone* zone);
 
@@ skipping 50 matching lines @@
 
   int optimization_id_;
 
   int osr_expr_stack_height_;
 
   // The current OSR frame for specialization or {nullptr}.
   JavaScriptFrame* osr_frame_ = nullptr;
 
   Vector<const char> debug_name_;
 
+  // Encapsulates coverage information gathered by the bytecode generator.
+  // Needs to be stored on the shared function info once compilation completes.
+  Handle<CoverageInfo> coverage_info_;
+
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILATION_INFO_H_