blob: 7c083521753fe57011dd65b0d0ed0c25850dd769 [file] [log] [blame]
// Copyright 2014 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 <vector>
#include "src/arguments-inl.h"
#include "src/compiler.h"
#include "src/counters.h"
#include "src/debug/debug-coverage.h"
#include "src/debug/debug-evaluate.h"
#include "src/debug/debug-frames.h"
#include "src/debug/debug-scopes.h"
#include "src/debug/debug.h"
#include "src/debug/liveedit.h"
#include "src/frames-inl.h"
#include "src/globals.h"
#include "src/heap/heap-inl.h" // For ToBoolean. TODO(jkummerow): Drop.
#include "src/interpreter/bytecode-array-accessor.h"
#include "src/interpreter/bytecodes.h"
#include "src/interpreter/interpreter.h"
#include "src/isolate-inl.h"
#include "src/objects/debug-objects-inl.h"
#include "src/objects/heap-object-inl.h"
#include "src/objects/js-collection-inl.h"
#include "src/objects/js-generator-inl.h"
#include "src/objects/js-promise-inl.h"
#include "src/runtime/runtime-utils.h"
#include "src/runtime/runtime.h"
#include "src/snapshot/snapshot.h"
#include "src/wasm/wasm-objects-inl.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_DebugBreakOnBytecode) {
using interpreter::Bytecode;
using interpreter::Bytecodes;
using interpreter::OperandScale;
SealHandleScope shs(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
HandleScope scope(isolate);
// Return value can be changed by debugger. Last set value will be used as
// return value.
ReturnValueScope result_scope(isolate->debug());
isolate->debug()->set_return_value(*value);
// Get the top-most JavaScript frame.
JavaScriptFrameIterator it(isolate);
if (isolate->debug_execution_mode() == DebugInfo::kBreakpoints) {
isolate->debug()->Break(it.frame(),
handle(it.frame()->function(), isolate));
}
// If we are dropping frames, there is no need to get a return value or
// bytecode, since we will be restarting execution at a different frame.
if (isolate->debug()->will_restart()) {
return MakePair(ReadOnlyRoots(isolate).undefined_value(),
Smi::FromInt(static_cast<uint8_t>(Bytecode::kIllegal)));
}
// Return the handler from the original bytecode array.
DCHECK(it.frame()->is_interpreted());
InterpretedFrame* interpreted_frame =
reinterpret_cast<InterpretedFrame*>(it.frame());
SharedFunctionInfo shared = interpreted_frame->function()->shared();
BytecodeArray bytecode_array = shared->GetBytecodeArray();
int bytecode_offset = interpreted_frame->GetBytecodeOffset();
Bytecode bytecode = Bytecodes::FromByte(bytecode_array->get(bytecode_offset));
bool side_effect_check_failed = false;
if (isolate->debug_execution_mode() == DebugInfo::kSideEffects) {
side_effect_check_failed =
!isolate->debug()->PerformSideEffectCheckAtBytecode(interpreted_frame);
}
if (Bytecodes::Returns(bytecode)) {
// If we are returning (or suspending), reset the bytecode array on the
// interpreted stack frame to the non-debug variant so that the interpreter
// entry trampoline sees the return/suspend bytecode rather than the
// DebugBreak.
interpreted_frame->PatchBytecodeArray(bytecode_array);
}
// We do not have to deal with operand scale here. If the bytecode at the
// break is prefixed by operand scaling, we would have patched over the
// scaling prefix. We now simply dispatch to the handler for the prefix.
// We need to deserialize now to ensure we don't hit the debug break again
// after deserializing.
OperandScale operand_scale = OperandScale::kSingle;
isolate->interpreter()->GetBytecodeHandler(bytecode, operand_scale);
if (side_effect_check_failed) {
return MakePair(ReadOnlyRoots(isolate).exception(),
Smi::FromInt(static_cast<uint8_t>(bytecode)));
}
Object interrupt_object = isolate->stack_guard()->HandleInterrupts();
if (interrupt_object->IsException(isolate)) {
return MakePair(interrupt_object,
Smi::FromInt(static_cast<uint8_t>(bytecode)));
}
return MakePair(isolate->debug()->return_value(),
Smi::FromInt(static_cast<uint8_t>(bytecode)));
}
RUNTIME_FUNCTION(Runtime_DebugBreakAtEntry) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
USE(function);
DCHECK(function->shared()->HasDebugInfo());
DCHECK(function->shared()->GetDebugInfo()->BreakAtEntry());
// Get the top-most JavaScript frame.
JavaScriptFrameIterator it(isolate);
DCHECK_EQ(*function, it.frame()->function());
isolate->debug()->Break(it.frame(), function);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_HandleDebuggerStatement) {
SealHandleScope shs(isolate);
DCHECK_EQ(0, args.length());
if (isolate->debug()->break_points_active()) {
isolate->debug()->HandleDebugBreak(kIgnoreIfTopFrameBlackboxed);
}
return isolate->stack_guard()->HandleInterrupts();
}
RUNTIME_FUNCTION(Runtime_ScheduleBreak) {
SealHandleScope shs(isolate);
DCHECK_EQ(0, args.length());
isolate->RequestInterrupt(
[](v8::Isolate* isolate, void*) { v8::debug::BreakRightNow(isolate); },
nullptr);
return ReadOnlyRoots(isolate).undefined_value();
}
template <class IteratorType>
static MaybeHandle<JSArray> GetIteratorInternalProperties(
Isolate* isolate, Handle<IteratorType> object) {
Factory* factory = isolate->factory();
Handle<IteratorType> iterator = Handle<IteratorType>::cast(object);
const char* kind = nullptr;
switch (iterator->map()->instance_type()) {
case JS_MAP_KEY_ITERATOR_TYPE:
kind = "keys";
break;
case JS_MAP_KEY_VALUE_ITERATOR_TYPE:
case JS_SET_KEY_VALUE_ITERATOR_TYPE:
kind = "entries";
break;
case JS_MAP_VALUE_ITERATOR_TYPE:
case JS_SET_VALUE_ITERATOR_TYPE:
kind = "values";
break;
default:
UNREACHABLE();
}
Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
Handle<String> has_more =
factory->NewStringFromAsciiChecked("[[IteratorHasMore]]");
result->set(0, *has_more);
result->set(1, isolate->heap()->ToBoolean(iterator->HasMore()));
Handle<String> index =
factory->NewStringFromAsciiChecked("[[IteratorIndex]]");
result->set(2, *index);
result->set(3, iterator->index());
Handle<String> iterator_kind =
factory->NewStringFromAsciiChecked("[[IteratorKind]]");
result->set(4, *iterator_kind);
Handle<String> kind_str = factory->NewStringFromAsciiChecked(kind);
result->set(5, *kind_str);
return factory->NewJSArrayWithElements(result);
}
MaybeHandle<JSArray> Runtime::GetInternalProperties(Isolate* isolate,
Handle<Object> object) {
Factory* factory = isolate->factory();
if (object->IsJSBoundFunction()) {
Handle<JSBoundFunction> function = Handle<JSBoundFunction>::cast(object);
Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
Handle<String> target =
factory->NewStringFromAsciiChecked("[[TargetFunction]]");
result->set(0, *target);
result->set(1, function->bound_target_function());
Handle<String> bound_this =
factory->NewStringFromAsciiChecked("[[BoundThis]]");
result->set(2, *bound_this);
result->set(3, function->bound_this());
Handle<String> bound_args =
factory->NewStringFromAsciiChecked("[[BoundArgs]]");
result->set(4, *bound_args);
Handle<FixedArray> bound_arguments =
factory->CopyFixedArray(handle(function->bound_arguments(), isolate));
Handle<JSArray> arguments_array =
factory->NewJSArrayWithElements(bound_arguments);
result->set(5, *arguments_array);
return factory->NewJSArrayWithElements(result);
} else if (object->IsJSMapIterator()) {
Handle<JSMapIterator> iterator = Handle<JSMapIterator>::cast(object);
return GetIteratorInternalProperties(isolate, iterator);
} else if (object->IsJSSetIterator()) {
Handle<JSSetIterator> iterator = Handle<JSSetIterator>::cast(object);
return GetIteratorInternalProperties(isolate, iterator);
} else if (object->IsJSGeneratorObject()) {
Handle<JSGeneratorObject> generator =
Handle<JSGeneratorObject>::cast(object);
const char* status = "suspended";
if (generator->is_closed()) {
status = "closed";
} else if (generator->is_executing()) {
status = "running";
} else {
DCHECK(generator->is_suspended());
}
Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
Handle<String> generator_status =
factory->NewStringFromAsciiChecked("[[GeneratorStatus]]");
result->set(0, *generator_status);
Handle<String> status_str = factory->NewStringFromAsciiChecked(status);
result->set(1, *status_str);
Handle<String> function =
factory->NewStringFromAsciiChecked("[[GeneratorFunction]]");
result->set(2, *function);
result->set(3, generator->function());
Handle<String> receiver =
factory->NewStringFromAsciiChecked("[[GeneratorReceiver]]");
result->set(4, *receiver);
result->set(5, generator->receiver());
return factory->NewJSArrayWithElements(result);
} else if (object->IsJSPromise()) {
Handle<JSPromise> promise = Handle<JSPromise>::cast(object);
const char* status = JSPromise::Status(promise->status());
Handle<FixedArray> result = factory->NewFixedArray(2 * 2);
Handle<String> promise_status =
factory->NewStringFromAsciiChecked("[[PromiseStatus]]");
result->set(0, *promise_status);
Handle<String> status_str = factory->NewStringFromAsciiChecked(status);
result->set(1, *status_str);
Handle<Object> value_obj(promise->status() == Promise::kPending
? ReadOnlyRoots(isolate).undefined_value()
: promise->result(),
isolate);
Handle<String> promise_value =
factory->NewStringFromAsciiChecked("[[PromiseValue]]");
result->set(2, *promise_value);
result->set(3, *value_obj);
return factory->NewJSArrayWithElements(result);
} else if (object->IsJSProxy()) {
Handle<JSProxy> js_proxy = Handle<JSProxy>::cast(object);
Handle<FixedArray> result = factory->NewFixedArray(3 * 2);
Handle<String> handler_str =
factory->NewStringFromAsciiChecked("[[Handler]]");
result->set(0, *handler_str);
result->set(1, js_proxy->handler());
Handle<String> target_str =
factory->NewStringFromAsciiChecked("[[Target]]");
result->set(2, *target_str);
result->set(3, js_proxy->target());
Handle<String> is_revoked_str =
factory->NewStringFromAsciiChecked("[[IsRevoked]]");
result->set(4, *is_revoked_str);
result->set(5, isolate->heap()->ToBoolean(js_proxy->IsRevoked()));
return factory->NewJSArrayWithElements(result);
} else if (object->IsJSValue()) {
Handle<JSValue> js_value = Handle<JSValue>::cast(object);
Handle<FixedArray> result = factory->NewFixedArray(2);
Handle<String> primitive_value =
factory->NewStringFromAsciiChecked("[[PrimitiveValue]]");
result->set(0, *primitive_value);
result->set(1, js_value->value());
return factory->NewJSArrayWithElements(result);
}
return factory->NewJSArray(0);
}
RUNTIME_FUNCTION(Runtime_GetGeneratorScopeCount) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
if (!args[0]->IsJSGeneratorObject()) return Smi::kZero;
// Check arguments.
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, gen, 0);
// Only inspect suspended generator scopes.
if (!gen->is_suspended()) {
return Smi::kZero;
}
// Count the visible scopes.
int n = 0;
for (ScopeIterator it(isolate, gen); !it.Done(); it.Next()) {
n++;
}
return Smi::FromInt(n);
}
RUNTIME_FUNCTION(Runtime_GetGeneratorScopeDetails) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
if (!args[0]->IsJSGeneratorObject()) {
return ReadOnlyRoots(isolate).undefined_value();
}
// Check arguments.
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, gen, 0);
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
// Only inspect suspended generator scopes.
if (!gen->is_suspended()) {
return ReadOnlyRoots(isolate).undefined_value();
}
// Find the requested scope.
int n = 0;
ScopeIterator it(isolate, gen);
for (; !it.Done() && n < index; it.Next()) {
n++;
}
if (it.Done()) {
return ReadOnlyRoots(isolate).undefined_value();
}
return *it.MaterializeScopeDetails();
}
static bool SetScopeVariableValue(ScopeIterator* it, int index,
Handle<String> variable_name,
Handle<Object> new_value) {
for (int n = 0; !it->Done() && n < index; it->Next()) {
n++;
}
if (it->Done()) {
return false;
}
return it->SetVariableValue(variable_name, new_value);
}
// Change variable value in closure or local scope
// args[0]: number or JsFunction: break id or function
// args[1]: number: scope index
// args[2]: string: variable name
// args[3]: object: new value
//
// Return true if success and false otherwise
RUNTIME_FUNCTION(Runtime_SetGeneratorScopeVariableValue) {
HandleScope scope(isolate);
DCHECK_EQ(4, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, gen, 0);
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
CONVERT_ARG_HANDLE_CHECKED(String, variable_name, 2);
CONVERT_ARG_HANDLE_CHECKED(Object, new_value, 3);
ScopeIterator it(isolate, gen);
bool res = SetScopeVariableValue(&it, index, variable_name, new_value);
return isolate->heap()->ToBoolean(res);
}
RUNTIME_FUNCTION(Runtime_GetBreakLocations) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CHECK(isolate->debug()->is_active());
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
Handle<SharedFunctionInfo> shared(fun->shared(), isolate);
// Find the number of break points
Handle<Object> break_locations =
Debug::GetSourceBreakLocations(isolate, shared);
if (break_locations->IsUndefined(isolate)) {
return ReadOnlyRoots(isolate).undefined_value();
}
// Return array as JS array
return *isolate->factory()->NewJSArrayWithElements(
Handle<FixedArray>::cast(break_locations));
}
// Returns the state of break on exceptions
// args[0]: boolean indicating uncaught exceptions
RUNTIME_FUNCTION(Runtime_IsBreakOnException) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_NUMBER_CHECKED(uint32_t, type_arg, Uint32, args[0]);
ExceptionBreakType type = static_cast<ExceptionBreakType>(type_arg);
bool result = isolate->debug()->IsBreakOnException(type);
return Smi::FromInt(result);
}
// Clear all stepping set by PrepareStep.
RUNTIME_FUNCTION(Runtime_ClearStepping) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
CHECK(isolate->debug()->is_active());
isolate->debug()->ClearStepping();
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugGetLoadedScriptIds) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
Handle<FixedArray> instances;
{
DebugScope debug_scope(isolate->debug());
// Fill the script objects.
instances = isolate->debug()->GetLoadedScripts();
}
// Convert the script objects to proper JS objects.
for (int i = 0; i < instances->length(); i++) {
Handle<Script> script(Script::cast(instances->get(i)), isolate);
instances->set(i, Smi::FromInt(script->id()));
}
// Return result as a JS array.
return *isolate->factory()->NewJSArrayWithElements(instances);
}
RUNTIME_FUNCTION(Runtime_FunctionGetInferredName) {
SealHandleScope shs(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_CHECKED(Object, f, 0);
if (f->IsJSFunction()) {
return JSFunction::cast(f)->shared()->inferred_name();
}
return ReadOnlyRoots(isolate).empty_string();
}
// Performs a GC.
// Presently, it only does a full GC.
RUNTIME_FUNCTION(Runtime_CollectGarbage) {
SealHandleScope shs(isolate);
DCHECK_EQ(1, args.length());
isolate->heap()->PreciseCollectAllGarbage(Heap::kNoGCFlags,
GarbageCollectionReason::kRuntime);
return ReadOnlyRoots(isolate).undefined_value();
}
// Gets the current heap usage.
RUNTIME_FUNCTION(Runtime_GetHeapUsage) {
SealHandleScope shs(isolate);
DCHECK_EQ(0, args.length());
int usage = static_cast<int>(isolate->heap()->SizeOfObjects());
if (!Smi::IsValid(usage)) {
return *isolate->factory()->NewNumberFromInt(usage);
}
return Smi::FromInt(usage);
}
namespace {
int ScriptLinePosition(Handle<Script> script, int line) {
if (line < 0) return -1;
if (script->type() == Script::TYPE_WASM) {
return WasmModuleObject::cast(script->wasm_module_object())
->GetFunctionOffset(line);
}
Script::InitLineEnds(script);
FixedArray line_ends_array = FixedArray::cast(script->line_ends());
const int line_count = line_ends_array->length();
DCHECK_LT(0, line_count);
if (line == 0) return 0;
// If line == line_count, we return the first position beyond the last line.
if (line > line_count) return -1;
return Smi::ToInt(line_ends_array->get(line - 1)) + 1;
}
int ScriptLinePositionWithOffset(Handle<Script> script, int line, int offset) {
if (line < 0 || offset < 0) return -1;
if (line == 0 || offset == 0)
return ScriptLinePosition(script, line) + offset;
Script::PositionInfo info;
if (!Script::GetPositionInfo(script, offset, &info, Script::NO_OFFSET)) {
return -1;
}
const int total_line = info.line + line;
return ScriptLinePosition(script, total_line);
}
Handle<Object> GetJSPositionInfo(Handle<Script> script, int position,
Script::OffsetFlag offset_flag,
Isolate* isolate) {
Script::PositionInfo info;
if (!Script::GetPositionInfo(script, position, &info, offset_flag)) {
return isolate->factory()->null_value();
}
Handle<String> source = handle(String::cast(script->source()), isolate);
Handle<String> sourceText = script->type() == Script::TYPE_WASM
? isolate->factory()->empty_string()
: isolate->factory()->NewSubString(
source, info.line_start, info.line_end);
Handle<JSObject> jsinfo =
isolate->factory()->NewJSObject(isolate->object_function());
JSObject::AddProperty(isolate, jsinfo, isolate->factory()->script_string(),
script, NONE);
JSObject::AddProperty(isolate, jsinfo, isolate->factory()->position_string(),
handle(Smi::FromInt(position), isolate), NONE);
JSObject::AddProperty(isolate, jsinfo, isolate->factory()->line_string(),
handle(Smi::FromInt(info.line), isolate), NONE);
JSObject::AddProperty(isolate, jsinfo, isolate->factory()->column_string(),
handle(Smi::FromInt(info.column), isolate), NONE);
JSObject::AddProperty(isolate, jsinfo,
isolate->factory()->sourceText_string(), sourceText,
NONE);
return jsinfo;
}
Handle<Object> ScriptLocationFromLine(Isolate* isolate, Handle<Script> script,
Handle<Object> opt_line,
Handle<Object> opt_column,
int32_t offset) {
// Line and column are possibly undefined and we need to handle these cases,
// additionally subtracting corresponding offsets.
int32_t line = 0;
if (!opt_line->IsNullOrUndefined(isolate)) {
CHECK(opt_line->IsNumber());
line = NumberToInt32(*opt_line) - script->line_offset();
}
int32_t column = 0;
if (!opt_column->IsNullOrUndefined(isolate)) {
CHECK(opt_column->IsNumber());
column = NumberToInt32(*opt_column);
if (line == 0) column -= script->column_offset();
}
int line_position = ScriptLinePositionWithOffset(script, line, offset);
if (line_position < 0 || column < 0) return isolate->factory()->null_value();
return GetJSPositionInfo(script, line_position + column, Script::NO_OFFSET,
isolate);
}
// Slow traversal over all scripts on the heap.
bool GetScriptById(Isolate* isolate, int needle, Handle<Script>* result) {
Script::Iterator iterator(isolate);
for (Script script = iterator.Next(); !script.is_null();
script = iterator.Next()) {
if (script->id() == needle) {
*result = handle(script, isolate);
return true;
}
}
return false;
}
} // namespace
// TODO(5530): Rename once conflicting function has been deleted.
RUNTIME_FUNCTION(Runtime_ScriptLocationFromLine2) {
HandleScope scope(isolate);
DCHECK_EQ(4, args.length());
CONVERT_NUMBER_CHECKED(int32_t, scriptid, Int32, args[0]);
CONVERT_ARG_HANDLE_CHECKED(Object, opt_line, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, opt_column, 2);
CONVERT_NUMBER_CHECKED(int32_t, offset, Int32, args[3]);
Handle<Script> script;
CHECK(GetScriptById(isolate, scriptid, &script));
return *ScriptLocationFromLine(isolate, script, opt_line, opt_column, offset);
}
// On function call, depending on circumstances, prepare for stepping in,
// or perform a side effect check.
RUNTIME_FUNCTION(Runtime_DebugOnFunctionCall) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
if (isolate->debug()->needs_check_on_function_call()) {
// Ensure that the callee will perform debug check on function call too.
Deoptimizer::DeoptimizeFunction(*fun);
if (isolate->debug()->last_step_action() >= StepIn ||
isolate->debug()->break_on_next_function_call()) {
DCHECK_EQ(isolate->debug_execution_mode(), DebugInfo::kBreakpoints);
isolate->debug()->PrepareStepIn(fun);
}
if (isolate->debug_execution_mode() == DebugInfo::kSideEffects &&
!isolate->debug()->PerformSideEffectCheck(fun, receiver)) {
return ReadOnlyRoots(isolate).exception();
}
}
return ReadOnlyRoots(isolate).undefined_value();
}
// Set one shot breakpoints for the suspended generator object.
RUNTIME_FUNCTION(Runtime_DebugPrepareStepInSuspendedGenerator) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
isolate->debug()->PrepareStepInSuspendedGenerator();
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPushPromise) {
DCHECK_EQ(1, args.length());
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0);
isolate->PushPromise(promise);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPopPromise) {
DCHECK_EQ(0, args.length());
SealHandleScope shs(isolate);
isolate->PopPromise();
return ReadOnlyRoots(isolate).undefined_value();
}
namespace {
Handle<JSObject> MakeRangeObject(Isolate* isolate, const CoverageBlock& range) {
Factory* factory = isolate->factory();
Handle<String> start_string = factory->InternalizeUtf8String("start");
Handle<String> end_string = factory->InternalizeUtf8String("end");
Handle<String> count_string = factory->InternalizeUtf8String("count");
Handle<JSObject> range_obj = factory->NewJSObjectWithNullProto();
JSObject::AddProperty(isolate, range_obj, start_string,
factory->NewNumberFromInt(range.start), NONE);
JSObject::AddProperty(isolate, range_obj, end_string,
factory->NewNumberFromInt(range.end), NONE);
JSObject::AddProperty(isolate, range_obj, count_string,
factory->NewNumberFromUint(range.count), NONE);
return range_obj;
}
} // namespace
RUNTIME_FUNCTION(Runtime_DebugCollectCoverage) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
// Collect coverage data.
std::unique_ptr<Coverage> coverage;
if (isolate->is_best_effort_code_coverage()) {
coverage = Coverage::CollectBestEffort(isolate);
} else {
coverage = Coverage::CollectPrecise(isolate);
}
Factory* factory = isolate->factory();
// Turn the returned data structure into JavaScript.
// Create an array of scripts.
int num_scripts = static_cast<int>(coverage->size());
// Prepare property keys.
Handle<FixedArray> scripts_array = factory->NewFixedArray(num_scripts);
Handle<String> script_string = factory->NewStringFromStaticChars("script");
for (int i = 0; i < num_scripts; i++) {
const auto& script_data = coverage->at(i);
HandleScope inner_scope(isolate);
std::vector<CoverageBlock> ranges;
int num_functions = static_cast<int>(script_data.functions.size());
for (int j = 0; j < num_functions; j++) {
const auto& function_data = script_data.functions[j];
ranges.emplace_back(function_data.start, function_data.end,
function_data.count);
for (size_t k = 0; k < function_data.blocks.size(); k++) {
const auto& block_data = function_data.blocks[k];
ranges.emplace_back(block_data.start, block_data.end, block_data.count);
}
}
int num_ranges = static_cast<int>(ranges.size());
Handle<FixedArray> ranges_array = factory->NewFixedArray(num_ranges);
for (int j = 0; j < num_ranges; j++) {
Handle<JSObject> range_object = MakeRangeObject(isolate, ranges[j]);
ranges_array->set(j, *range_object);
}
Handle<JSArray> script_obj =
factory->NewJSArrayWithElements(ranges_array, PACKED_ELEMENTS);
JSObject::AddProperty(isolate, script_obj, script_string,
handle(script_data.script->source(), isolate), NONE);
scripts_array->set(i, *script_obj);
}
return *factory->NewJSArrayWithElements(scripts_array, PACKED_ELEMENTS);
}
RUNTIME_FUNCTION(Runtime_DebugTogglePreciseCoverage) {
SealHandleScope shs(isolate);
CONVERT_BOOLEAN_ARG_CHECKED(enable, 0);
Coverage::SelectMode(isolate, enable ? debug::CoverageMode::kPreciseCount
: debug::CoverageMode::kBestEffort);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugToggleBlockCoverage) {
SealHandleScope shs(isolate);
CONVERT_BOOLEAN_ARG_CHECKED(enable, 0);
Coverage::SelectMode(isolate, enable ? debug::CoverageMode::kBlockCount
: debug::CoverageMode::kBestEffort);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_IncBlockCounter) {
SealHandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_ARG_CHECKED(JSFunction, function, 0);
CONVERT_SMI_ARG_CHECKED(coverage_array_slot_index, 1);
// It's quite possible that a function contains IncBlockCounter bytecodes, but
// no coverage info exists. This happens e.g. by selecting the best-effort
// coverage collection mode, which triggers deletion of all coverage infos in
// order to avoid memory leaks.
SharedFunctionInfo shared = function->shared();
if (shared->HasCoverageInfo()) {
CoverageInfo coverage_info = shared->GetCoverageInfo();
coverage_info->IncrementBlockCount(coverage_array_slot_index);
}
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugAsyncFunctionEntered) {
DCHECK_EQ(1, args.length());
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
isolate->RunPromiseHook(PromiseHookType::kInit, promise,
isolate->factory()->undefined_value());
if (isolate->debug()->is_active()) isolate->PushPromise(promise);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugAsyncFunctionFinished) {
DCHECK_EQ(2, args.length());
HandleScope scope(isolate);
CONVERT_BOOLEAN_ARG_CHECKED(has_suspend, 0);
CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 1);
isolate->PopPromise();
if (has_suspend) {
isolate->OnAsyncFunctionStateChanged(promise,
debug::kAsyncFunctionFinished);
}
return *promise;
}
RUNTIME_FUNCTION(Runtime_DebugAsyncFunctionSuspended) {
DCHECK_EQ(1, args.length());
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
isolate->OnAsyncFunctionStateChanged(promise, debug::kAsyncFunctionSuspended);
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_LiveEditPatchScript) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSFunction, script_function, 0);
CONVERT_ARG_HANDLE_CHECKED(String, new_source, 1);
Handle<Script> script(Script::cast(script_function->shared()->script()),
isolate);
v8::debug::LiveEditResult result;
LiveEdit::PatchScript(isolate, script, new_source, false, &result);
switch (result.status) {
case v8::debug::LiveEditResult::COMPILE_ERROR:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: COMPILE_ERROR"));
case v8::debug::LiveEditResult::BLOCKED_BY_RUNNING_GENERATOR:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: BLOCKED_BY_RUNNING_GENERATOR"));
case v8::debug::LiveEditResult::BLOCKED_BY_FUNCTION_ABOVE_BREAK_FRAME:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: BLOCKED_BY_FUNCTION_ABOVE_BREAK_FRAME"));
case v8::debug::LiveEditResult::
BLOCKED_BY_FUNCTION_BELOW_NON_DROPPABLE_FRAME:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: BLOCKED_BY_FUNCTION_BELOW_NON_DROPPABLE_FRAME"));
case v8::debug::LiveEditResult::BLOCKED_BY_ACTIVE_FUNCTION:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: BLOCKED_BY_ACTIVE_FUNCTION"));
case v8::debug::LiveEditResult::BLOCKED_BY_NEW_TARGET_IN_RESTART_FRAME:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: BLOCKED_BY_NEW_TARGET_IN_RESTART_FRAME"));
case v8::debug::LiveEditResult::FRAME_RESTART_IS_NOT_SUPPORTED:
return isolate->Throw(*isolate->factory()->NewStringFromAsciiChecked(
"LiveEdit failed: FRAME_RESTART_IS_NOT_SUPPORTED"));
case v8::debug::LiveEditResult::OK:
return ReadOnlyRoots(isolate).undefined_value();
}
return ReadOnlyRoots(isolate).undefined_value();
}
RUNTIME_FUNCTION(Runtime_PerformSideEffectCheckForObject) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0);
DCHECK_EQ(isolate->debug_execution_mode(), DebugInfo::kSideEffects);
if (!isolate->debug()->PerformSideEffectCheckForObject(object)) {
DCHECK(isolate->has_pending_exception());
return ReadOnlyRoots(isolate).exception();
}
return ReadOnlyRoots(isolate).undefined_value();
}
} // namespace internal
} // namespace v8