Line data    Source code

       1             : // Copyright 2017 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_DEBUG_DEBUG_COVERAGE_H_
       6             : #define V8_DEBUG_DEBUG_COVERAGE_H_
       7             : 
       8             : #include <vector>
       9             : 
      10             : #include "src/debug/debug-interface.h"
      11             : #include "src/objects.h"
      12             : 
      13             : namespace v8 {
      14             : namespace internal {
      15             : 
      16             : // Forward declaration.
      17             : class Isolate;
      18             : 
      19             : struct CoverageBlock {
      20       58633 :   CoverageBlock(int s, int e, uint32_t c) : start(s), end(e), count(c) {}
      21             :   CoverageBlock() : CoverageBlock(kNoSourcePosition, kNoSourcePosition, 0) {}
      22             :   int start;
      23             :   int end;
      24             :   uint32_t count;
      25             : };
      26             : 
      27       12849 : struct CoverageFunction {
      28             :   CoverageFunction(int s, int e, uint32_t c, Handle<String> n)
      29       46350 :       : start(s), end(e), count(c), name(n), has_block_coverage(false) {}
      30             :   int start;
      31             :   int end;
      32             :   uint32_t count;
      33             :   Handle<String> name;
      34             :   // Blocks are sorted by start position, from outer to inner blocks.
      35             :   std::vector<CoverageBlock> blocks;
      36             :   bool has_block_coverage;
      37             : };
      38             : 
      39        5575 : struct CoverageScript {
      40             :   // Initialize top-level function in case it has been garbage-collected.
      41        3807 :   explicit CoverageScript(Handle<Script> s) : script(s) {}
      42             :   Handle<Script> script;
      43             :   // Functions are sorted by start position, from outer to inner function.
      44             :   std::vector<CoverageFunction> functions;
      45             : };
      46             : 
      47         443 : class Coverage : public std::vector<CoverageScript> {
      48             :  public:
      49             :   // Collecting precise coverage only works if the modes kPreciseCount or
      50             :   // kPreciseBinary is selected. The invocation count is reset on collection.
      51             :   // In case of kPreciseCount, an updated count since last collection is
      52             :   // returned. In case of kPreciseBinary, a count of 1 is returned if a
      53             :   // function has been executed for the first time since last collection.
      54             :   static std::unique_ptr<Coverage> CollectPrecise(Isolate* isolate);
      55             :   // Collecting best effort coverage always works, but may be imprecise
      56             :   // depending on selected mode. The invocation count is not reset.
      57             :   static std::unique_ptr<Coverage> CollectBestEffort(Isolate* isolate);
      58             : 
      59             :   // Select code coverage mode.
      60             :   static void SelectMode(Isolate* isolate, debug::Coverage::Mode mode);
      61             : 
      62             :  private:
      63             :   static std::unique_ptr<Coverage> Collect(
      64             :       Isolate* isolate, v8::debug::Coverage::Mode collectionMode);
      65             : 
      66             :   Coverage() {}
      67             : };
      68             : 
      69             : }  // namespace internal
      70             : }  // namespace v8
      71             : 
      72             : #endif  // V8_DEBUG_DEBUG_COVERAGE_H_