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// Copyright 2017 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_DEBUG_DEBUG_COVERAGE_H_
#define V8_DEBUG_DEBUG_COVERAGE_H_
#include <memory>
#include <vector>
#include "src/debug/debug-interface.h"
#include "src/handles/handles.h"
#include "src/objects/objects.h"
namespace v8 {
namespace internal {
// Forward declaration.
class Isolate;
struct CoverageBlock {
CoverageBlock(int s, int e, uint32_t c) : start(s), end(e), count(c) {}
CoverageBlock() : CoverageBlock(kNoSourcePosition, kNoSourcePosition, 0) {}
int start;
int end;
uint32_t count;
};
struct CoverageFunction {
CoverageFunction(int s, int e, uint32_t c, Handle<String> n)
: start(s), end(e), count(c), name(n), has_block_coverage(false) {}
bool HasNonEmptySourceRange() const { return start < end && start >= 0; }
bool HasBlocks() const { return !blocks.empty(); }
int start;
int end;
uint32_t count;
Handle<String> name;
// Blocks are sorted by start position, from outer to inner blocks.
std::vector<CoverageBlock> blocks;
bool has_block_coverage;
};
struct CoverageScript {
// Initialize top-level function in case it has been garbage-collected.
explicit CoverageScript(Handle<Script> s) : script(s) {}
Handle<Script> script;
// Functions are sorted by start position, from outer to inner function.
std::vector<CoverageFunction> functions;
};
class Coverage : public std::vector<CoverageScript> {
public:
// Collecting precise coverage only works if the modes kPreciseCount or
// kPreciseBinary is selected. The invocation count is reset on collection.
// In case of kPreciseCount, an updated count since last collection is
// returned. In case of kPreciseBinary, a count of 1 is returned if a
// function has been executed for the first time since last collection.
static std::unique_ptr<Coverage> CollectPrecise(Isolate* isolate);
// Collecting best effort coverage always works, but may be imprecise
// depending on selected mode. The invocation count is not reset.
static std::unique_ptr<Coverage> CollectBestEffort(Isolate* isolate);
// Select code coverage mode.
static void SelectMode(Isolate* isolate, debug::CoverageMode mode);
private:
static std::unique_ptr<Coverage> Collect(
Isolate* isolate, v8::debug::CoverageMode collectionMode);
Coverage() = default;
};
} // namespace internal
} // namespace v8
#endif // V8_DEBUG_DEBUG_COVERAGE_H_
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