| Index: src/debug.cc
|
| diff --git a/src/debug.cc b/src/debug.cc
|
| deleted file mode 100644
|
| index 38d9f47f29d186a41e6d4d225fb1fd2369e6a4f6..0000000000000000000000000000000000000000
|
| --- a/src/debug.cc
|
| +++ /dev/null
|
| @@ -1,2811 +0,0 @@
|
| -// 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/v8.h"
|
| -
|
| -#include "src/api.h"
|
| -#include "src/arguments.h"
|
| -#include "src/bootstrapper.h"
|
| -#include "src/code-stubs.h"
|
| -#include "src/codegen.h"
|
| -#include "src/compilation-cache.h"
|
| -#include "src/compiler.h"
|
| -#include "src/debug.h"
|
| -#include "src/deoptimizer.h"
|
| -#include "src/execution.h"
|
| -#include "src/full-codegen/full-codegen.h"
|
| -#include "src/global-handles.h"
|
| -#include "src/list.h"
|
| -#include "src/log.h"
|
| -#include "src/messages.h"
|
| -#include "src/snapshot/natives.h"
|
| -
|
| -#include "include/v8-debug.h"
|
| -
|
| -namespace v8 {
|
| -namespace internal {
|
| -
|
| -Debug::Debug(Isolate* isolate)
|
| - : debug_context_(Handle<Context>()),
|
| - event_listener_(Handle<Object>()),
|
| - event_listener_data_(Handle<Object>()),
|
| - message_handler_(NULL),
|
| - command_received_(0),
|
| - command_queue_(isolate->logger(), kQueueInitialSize),
|
| - is_active_(false),
|
| - is_suppressed_(false),
|
| - live_edit_enabled_(true), // TODO(yangguo): set to false by default.
|
| - break_disabled_(false),
|
| - in_debug_event_listener_(false),
|
| - break_on_exception_(false),
|
| - break_on_uncaught_exception_(false),
|
| - script_cache_(NULL),
|
| - debug_info_list_(NULL),
|
| - isolate_(isolate) {
|
| - ThreadInit();
|
| -}
|
| -
|
| -
|
| -static v8::Local<v8::Context> GetDebugEventContext(Isolate* isolate) {
|
| - Handle<Context> context = isolate->debug()->debugger_entry()->GetContext();
|
| - // Isolate::context() may have been NULL when "script collected" event
|
| - // occured.
|
| - if (context.is_null()) return v8::Local<v8::Context>();
|
| - Handle<Context> native_context(context->native_context());
|
| - return v8::Utils::ToLocal(native_context);
|
| -}
|
| -
|
| -
|
| -BreakLocation::BreakLocation(Handle<DebugInfo> debug_info, RelocInfo* rinfo,
|
| - int position, int statement_position)
|
| - : debug_info_(debug_info),
|
| - pc_offset_(static_cast<int>(rinfo->pc() - debug_info->code()->entry())),
|
| - rmode_(rinfo->rmode()),
|
| - data_(rinfo->data()),
|
| - position_(position),
|
| - statement_position_(statement_position) {}
|
| -
|
| -
|
| -BreakLocation::Iterator::Iterator(Handle<DebugInfo> debug_info,
|
| - BreakLocatorType type)
|
| - : debug_info_(debug_info),
|
| - reloc_iterator_(debug_info->code(), GetModeMask(type)),
|
| - break_index_(-1),
|
| - position_(1),
|
| - statement_position_(1) {
|
| - if (!Done()) Next();
|
| -}
|
| -
|
| -
|
| -int BreakLocation::Iterator::GetModeMask(BreakLocatorType type) {
|
| - int mask = 0;
|
| - mask |= RelocInfo::ModeMask(RelocInfo::POSITION);
|
| - mask |= RelocInfo::ModeMask(RelocInfo::STATEMENT_POSITION);
|
| - mask |= RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT_AT_RETURN);
|
| - mask |= RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT_AT_CALL);
|
| - mask |= RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT_AT_CONSTRUCT_CALL);
|
| - if (type == ALL_BREAK_LOCATIONS) {
|
| - mask |= RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT_AT_POSITION);
|
| - mask |= RelocInfo::ModeMask(RelocInfo::DEBUGGER_STATEMENT);
|
| - }
|
| - return mask;
|
| -}
|
| -
|
| -
|
| -void BreakLocation::Iterator::Next() {
|
| - DisallowHeapAllocation no_gc;
|
| - DCHECK(!Done());
|
| -
|
| - // Iterate through reloc info for code and original code stopping at each
|
| - // breakable code target.
|
| - bool first = break_index_ == -1;
|
| - while (!Done()) {
|
| - if (!first) reloc_iterator_.next();
|
| - first = false;
|
| - if (Done()) return;
|
| -
|
| - // Whenever a statement position or (plain) position is passed update the
|
| - // current value of these.
|
| - if (RelocInfo::IsPosition(rmode())) {
|
| - if (RelocInfo::IsStatementPosition(rmode())) {
|
| - statement_position_ = static_cast<int>(
|
| - rinfo()->data() - debug_info_->shared()->start_position());
|
| - }
|
| - // Always update the position as we don't want that to be before the
|
| - // statement position.
|
| - position_ = static_cast<int>(rinfo()->data() -
|
| - debug_info_->shared()->start_position());
|
| - DCHECK(position_ >= 0);
|
| - DCHECK(statement_position_ >= 0);
|
| - continue;
|
| - }
|
| -
|
| - DCHECK(RelocInfo::IsDebugBreakSlot(rmode()) ||
|
| - RelocInfo::IsDebuggerStatement(rmode()));
|
| -
|
| - if (RelocInfo::IsDebugBreakSlotAtReturn(rmode())) {
|
| - // Set the positions to the end of the function.
|
| - if (debug_info_->shared()->HasSourceCode()) {
|
| - position_ = debug_info_->shared()->end_position() -
|
| - debug_info_->shared()->start_position() - 1;
|
| - } else {
|
| - position_ = 0;
|
| - }
|
| - statement_position_ = position_;
|
| - }
|
| -
|
| - break;
|
| - }
|
| - break_index_++;
|
| -}
|
| -
|
| -
|
| -// Find the break point at the supplied address, or the closest one before
|
| -// the address.
|
| -BreakLocation BreakLocation::FromAddress(Handle<DebugInfo> debug_info,
|
| - BreakLocatorType type, Address pc) {
|
| - Iterator it(debug_info, type);
|
| - it.SkipTo(BreakIndexFromAddress(debug_info, type, pc));
|
| - return it.GetBreakLocation();
|
| -}
|
| -
|
| -
|
| -// Find the break point at the supplied address, or the closest one before
|
| -// the address.
|
| -void BreakLocation::FromAddressSameStatement(Handle<DebugInfo> debug_info,
|
| - BreakLocatorType type, Address pc,
|
| - List<BreakLocation>* result_out) {
|
| - int break_index = BreakIndexFromAddress(debug_info, type, pc);
|
| - Iterator it(debug_info, type);
|
| - it.SkipTo(break_index);
|
| - int statement_position = it.statement_position();
|
| - while (!it.Done() && it.statement_position() == statement_position) {
|
| - result_out->Add(it.GetBreakLocation());
|
| - it.Next();
|
| - }
|
| -}
|
| -
|
| -
|
| -int BreakLocation::BreakIndexFromAddress(Handle<DebugInfo> debug_info,
|
| - BreakLocatorType type, Address pc) {
|
| - // Run through all break points to locate the one closest to the address.
|
| - int closest_break = 0;
|
| - int distance = kMaxInt;
|
| - for (Iterator it(debug_info, type); !it.Done(); it.Next()) {
|
| - // Check if this break point is closer that what was previously found.
|
| - if (it.pc() <= pc && pc - it.pc() < distance) {
|
| - closest_break = it.break_index();
|
| - distance = static_cast<int>(pc - it.pc());
|
| - // Check whether we can't get any closer.
|
| - if (distance == 0) break;
|
| - }
|
| - }
|
| - return closest_break;
|
| -}
|
| -
|
| -
|
| -BreakLocation BreakLocation::FromPosition(Handle<DebugInfo> debug_info,
|
| - BreakLocatorType type, int position,
|
| - BreakPositionAlignment alignment) {
|
| - // Run through all break points to locate the one closest to the source
|
| - // position.
|
| - int closest_break = 0;
|
| - int distance = kMaxInt;
|
| -
|
| - for (Iterator it(debug_info, type); !it.Done(); it.Next()) {
|
| - int next_position;
|
| - if (alignment == STATEMENT_ALIGNED) {
|
| - next_position = it.statement_position();
|
| - } else {
|
| - DCHECK(alignment == BREAK_POSITION_ALIGNED);
|
| - next_position = it.position();
|
| - }
|
| - if (position <= next_position && next_position - position < distance) {
|
| - closest_break = it.break_index();
|
| - distance = next_position - position;
|
| - // Check whether we can't get any closer.
|
| - if (distance == 0) break;
|
| - }
|
| - }
|
| -
|
| - Iterator it(debug_info, type);
|
| - it.SkipTo(closest_break);
|
| - return it.GetBreakLocation();
|
| -}
|
| -
|
| -
|
| -void BreakLocation::SetBreakPoint(Handle<Object> break_point_object) {
|
| - // If there is not already a real break point here patch code with debug
|
| - // break.
|
| - if (!HasBreakPoint()) SetDebugBreak();
|
| - DCHECK(IsDebugBreak() || IsDebuggerStatement());
|
| - // Set the break point information.
|
| - DebugInfo::SetBreakPoint(debug_info_, pc_offset_, position_,
|
| - statement_position_, break_point_object);
|
| -}
|
| -
|
| -
|
| -void BreakLocation::ClearBreakPoint(Handle<Object> break_point_object) {
|
| - // Clear the break point information.
|
| - DebugInfo::ClearBreakPoint(debug_info_, pc_offset_, break_point_object);
|
| - // If there are no more break points here remove the debug break.
|
| - if (!HasBreakPoint()) {
|
| - ClearDebugBreak();
|
| - DCHECK(!IsDebugBreak());
|
| - }
|
| -}
|
| -
|
| -
|
| -void BreakLocation::SetOneShot() {
|
| - // Debugger statement always calls debugger. No need to modify it.
|
| - if (IsDebuggerStatement()) return;
|
| -
|
| - // If there is a real break point here no more to do.
|
| - if (HasBreakPoint()) {
|
| - DCHECK(IsDebugBreak());
|
| - return;
|
| - }
|
| -
|
| - // Patch code with debug break.
|
| - SetDebugBreak();
|
| -}
|
| -
|
| -
|
| -void BreakLocation::ClearOneShot() {
|
| - // Debugger statement always calls debugger. No need to modify it.
|
| - if (IsDebuggerStatement()) return;
|
| -
|
| - // If there is a real break point here no more to do.
|
| - if (HasBreakPoint()) {
|
| - DCHECK(IsDebugBreak());
|
| - return;
|
| - }
|
| -
|
| - // Patch code removing debug break.
|
| - ClearDebugBreak();
|
| - DCHECK(!IsDebugBreak());
|
| -}
|
| -
|
| -
|
| -void BreakLocation::SetDebugBreak() {
|
| - // Debugger statement always calls debugger. No need to modify it.
|
| - if (IsDebuggerStatement()) return;
|
| -
|
| - // If there is already a break point here just return. This might happen if
|
| - // the same code is flooded with break points twice. Flooding the same
|
| - // function twice might happen when stepping in a function with an exception
|
| - // handler as the handler and the function is the same.
|
| - if (IsDebugBreak()) return;
|
| -
|
| - DCHECK(IsDebugBreakSlot());
|
| - Builtins* builtins = debug_info_->GetIsolate()->builtins();
|
| - Handle<Code> target =
|
| - IsReturn() ? builtins->Return_DebugBreak() : builtins->Slot_DebugBreak();
|
| - DebugCodegen::PatchDebugBreakSlot(pc(), target);
|
| - DCHECK(IsDebugBreak());
|
| -}
|
| -
|
| -
|
| -void BreakLocation::ClearDebugBreak() {
|
| - // Debugger statement always calls debugger. No need to modify it.
|
| - if (IsDebuggerStatement()) return;
|
| -
|
| - DCHECK(IsDebugBreakSlot());
|
| - DebugCodegen::ClearDebugBreakSlot(pc());
|
| - DCHECK(!IsDebugBreak());
|
| -}
|
| -
|
| -
|
| -bool BreakLocation::IsStepInLocation() const {
|
| - return IsConstructCall() || IsCall();
|
| -}
|
| -
|
| -
|
| -bool BreakLocation::IsDebugBreak() const {
|
| - if (IsDebugBreakSlot()) {
|
| - return rinfo().IsPatchedDebugBreakSlotSequence();
|
| - }
|
| - return false;
|
| -}
|
| -
|
| -
|
| -Handle<Object> BreakLocation::BreakPointObjects() const {
|
| - return debug_info_->GetBreakPointObjects(pc_offset_);
|
| -}
|
| -
|
| -
|
| -// Threading support.
|
| -void Debug::ThreadInit() {
|
| - thread_local_.break_count_ = 0;
|
| - thread_local_.break_id_ = 0;
|
| - thread_local_.break_frame_id_ = StackFrame::NO_ID;
|
| - thread_local_.last_step_action_ = StepNone;
|
| - thread_local_.last_statement_position_ = RelocInfo::kNoPosition;
|
| - thread_local_.step_count_ = 0;
|
| - thread_local_.last_fp_ = 0;
|
| - thread_local_.queued_step_count_ = 0;
|
| - thread_local_.step_into_fp_ = 0;
|
| - thread_local_.step_out_fp_ = 0;
|
| - // TODO(isolates): frames_are_dropped_?
|
| - base::NoBarrier_Store(&thread_local_.current_debug_scope_,
|
| - static_cast<base::AtomicWord>(0));
|
| - thread_local_.restarter_frame_function_pointer_ = NULL;
|
| -}
|
| -
|
| -
|
| -char* Debug::ArchiveDebug(char* storage) {
|
| - char* to = storage;
|
| - MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
|
| - ThreadInit();
|
| - return storage + ArchiveSpacePerThread();
|
| -}
|
| -
|
| -
|
| -char* Debug::RestoreDebug(char* storage) {
|
| - char* from = storage;
|
| - MemCopy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
|
| - return storage + ArchiveSpacePerThread();
|
| -}
|
| -
|
| -
|
| -int Debug::ArchiveSpacePerThread() {
|
| - return sizeof(ThreadLocal);
|
| -}
|
| -
|
| -
|
| -ScriptCache::ScriptCache(Isolate* isolate) : isolate_(isolate) {
|
| - Heap* heap = isolate_->heap();
|
| - HandleScope scope(isolate_);
|
| -
|
| - DCHECK(isolate_->debug()->is_active());
|
| -
|
| - // Perform a GC to get rid of all unreferenced scripts.
|
| - heap->CollectAllGarbage(Heap::kMakeHeapIterableMask, "ScriptCache");
|
| -
|
| - // Scan heap for Script objects.
|
| - List<Handle<Script> > scripts;
|
| - {
|
| - HeapIterator iterator(heap, HeapIterator::kFilterUnreachable);
|
| - DisallowHeapAllocation no_allocation;
|
| - for (HeapObject* obj = iterator.next(); obj != NULL;
|
| - obj = iterator.next()) {
|
| - if (obj->IsScript() && Script::cast(obj)->HasValidSource()) {
|
| - scripts.Add(Handle<Script>(Script::cast(obj)));
|
| - }
|
| - }
|
| - }
|
| -
|
| - GlobalHandles* global_handles = isolate_->global_handles();
|
| - table_ = Handle<WeakValueHashTable>::cast(global_handles->Create(
|
| - Object::cast(*WeakValueHashTable::New(isolate_, scripts.length()))));
|
| - for (int i = 0; i < scripts.length(); i++) Add(scripts[i]);
|
| -}
|
| -
|
| -
|
| -void ScriptCache::Add(Handle<Script> script) {
|
| - HandleScope scope(isolate_);
|
| - Handle<Smi> id(script->id(), isolate_);
|
| -
|
| -#ifdef DEBUG
|
| - Handle<Object> lookup(table_->LookupWeak(id), isolate_);
|
| - if (!lookup->IsTheHole()) {
|
| - Handle<Script> found = Handle<Script>::cast(lookup);
|
| - DCHECK(script->id() == found->id());
|
| - DCHECK(!script->name()->IsString() ||
|
| - String::cast(script->name())->Equals(String::cast(found->name())));
|
| - }
|
| -#endif
|
| -
|
| - Handle<WeakValueHashTable> new_table =
|
| - WeakValueHashTable::PutWeak(table_, id, script);
|
| -
|
| - if (new_table.is_identical_to(table_)) return;
|
| - GlobalHandles* global_handles = isolate_->global_handles();
|
| - global_handles->Destroy(Handle<Object>::cast(table_).location());
|
| - table_ = Handle<WeakValueHashTable>::cast(
|
| - global_handles->Create(Object::cast(*new_table)));
|
| -}
|
| -
|
| -
|
| -ScriptCache::~ScriptCache() {
|
| - isolate_->global_handles()->Destroy(Handle<Object>::cast(table_).location());
|
| - table_ = Handle<WeakValueHashTable>();
|
| -}
|
| -
|
| -
|
| -DebugInfoListNode::DebugInfoListNode(DebugInfo* debug_info): next_(NULL) {
|
| - // Globalize the request debug info object and make it weak.
|
| - GlobalHandles* global_handles = debug_info->GetIsolate()->global_handles();
|
| - debug_info_ =
|
| - Handle<DebugInfo>::cast(global_handles->Create(debug_info)).location();
|
| -}
|
| -
|
| -
|
| -DebugInfoListNode::~DebugInfoListNode() {
|
| - if (debug_info_ == nullptr) return;
|
| - GlobalHandles::Destroy(reinterpret_cast<Object**>(debug_info_));
|
| - debug_info_ = nullptr;
|
| -}
|
| -
|
| -
|
| -bool Debug::CompileDebuggerScript(Isolate* isolate, int index) {
|
| - Factory* factory = isolate->factory();
|
| - HandleScope scope(isolate);
|
| -
|
| - // Bail out if the index is invalid.
|
| - if (index == -1) return false;
|
| -
|
| - // Find source and name for the requested script.
|
| - Handle<String> source_code =
|
| - isolate->bootstrapper()->SourceLookup<Natives>(index);
|
| - Vector<const char> name = Natives::GetScriptName(index);
|
| - Handle<String> script_name =
|
| - factory->NewStringFromAscii(name).ToHandleChecked();
|
| - Handle<Context> context = isolate->native_context();
|
| -
|
| - // Compile the script.
|
| - Handle<SharedFunctionInfo> function_info;
|
| - function_info = Compiler::CompileScript(
|
| - source_code, script_name, 0, 0, ScriptOriginOptions(), Handle<Object>(),
|
| - context, NULL, NULL, ScriptCompiler::kNoCompileOptions, NATIVES_CODE,
|
| - false);
|
| - if (function_info.is_null()) return false;
|
| -
|
| - // Execute the shared function in the debugger context.
|
| - Handle<JSFunction> function =
|
| - factory->NewFunctionFromSharedFunctionInfo(function_info, context);
|
| -
|
| - MaybeHandle<Object> maybe_exception;
|
| - MaybeHandle<Object> result = Execution::TryCall(
|
| - function, handle(context->global_proxy()), 0, NULL, &maybe_exception);
|
| -
|
| - // Check for caught exceptions.
|
| - if (result.is_null()) {
|
| - DCHECK(!isolate->has_pending_exception());
|
| - MessageLocation computed_location;
|
| - isolate->ComputeLocation(&computed_location);
|
| - Handle<JSMessageObject> message = MessageHandler::MakeMessageObject(
|
| - isolate, MessageTemplate::kDebuggerLoading, &computed_location,
|
| - isolate->factory()->undefined_value(), Handle<JSArray>());
|
| - DCHECK(!isolate->has_pending_exception());
|
| - Handle<Object> exception;
|
| - if (maybe_exception.ToHandle(&exception)) {
|
| - isolate->set_pending_exception(*exception);
|
| - MessageHandler::ReportMessage(isolate, NULL, message);
|
| - }
|
| - DCHECK(!maybe_exception.is_null());
|
| - return false;
|
| - }
|
| -
|
| - // Mark this script as native and return successfully.
|
| - Handle<Script> script(Script::cast(function->shared()->script()));
|
| - script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
|
| - return true;
|
| -}
|
| -
|
| -
|
| -bool Debug::Load() {
|
| - // Return if debugger is already loaded.
|
| - if (is_loaded()) return true;
|
| -
|
| - // Bail out if we're already in the process of compiling the native
|
| - // JavaScript source code for the debugger.
|
| - if (is_suppressed_) return false;
|
| - SuppressDebug while_loading(this);
|
| -
|
| - // Disable breakpoints and interrupts while compiling and running the
|
| - // debugger scripts including the context creation code.
|
| - DisableBreak disable(this, true);
|
| - PostponeInterruptsScope postpone(isolate_);
|
| -
|
| - // Create the debugger context.
|
| - HandleScope scope(isolate_);
|
| - ExtensionConfiguration no_extensions;
|
| - Handle<Context> context = isolate_->bootstrapper()->CreateEnvironment(
|
| - MaybeHandle<JSGlobalProxy>(), v8::Local<ObjectTemplate>(),
|
| - &no_extensions);
|
| -
|
| - // Fail if no context could be created.
|
| - if (context.is_null()) return false;
|
| -
|
| - // Use the debugger context.
|
| - SaveContext save(isolate_);
|
| - isolate_->set_context(*context);
|
| -
|
| - // Expose the builtins object in the debugger context.
|
| - Handle<String> key = isolate_->factory()->InternalizeOneByteString(
|
| - STATIC_CHAR_VECTOR("builtins"));
|
| - Handle<GlobalObject> global =
|
| - Handle<GlobalObject>(context->global_object(), isolate_);
|
| - Handle<JSBuiltinsObject> builtin =
|
| - Handle<JSBuiltinsObject>(global->builtins(), isolate_);
|
| - RETURN_ON_EXCEPTION_VALUE(
|
| - isolate_, Object::SetProperty(global, key, builtin, SLOPPY), false);
|
| -
|
| - // Compile the JavaScript for the debugger in the debugger context.
|
| - bool caught_exception =
|
| - !CompileDebuggerScript(isolate_, Natives::GetIndex("mirror")) ||
|
| - !CompileDebuggerScript(isolate_, Natives::GetIndex("debug"));
|
| -
|
| - if (FLAG_enable_liveedit) {
|
| - caught_exception = caught_exception ||
|
| - !CompileDebuggerScript(isolate_, Natives::GetIndex("liveedit"));
|
| - }
|
| - // Check for caught exceptions.
|
| - if (caught_exception) return false;
|
| -
|
| - debug_context_ = Handle<Context>::cast(
|
| - isolate_->global_handles()->Create(*context));
|
| - return true;
|
| -}
|
| -
|
| -
|
| -void Debug::Unload() {
|
| - ClearAllBreakPoints();
|
| - ClearStepping();
|
| -
|
| - // Return debugger is not loaded.
|
| - if (!is_loaded()) return;
|
| -
|
| - // Clear the script cache.
|
| - if (script_cache_ != NULL) {
|
| - delete script_cache_;
|
| - script_cache_ = NULL;
|
| - }
|
| -
|
| - // Clear debugger context global handle.
|
| - GlobalHandles::Destroy(Handle<Object>::cast(debug_context_).location());
|
| - debug_context_ = Handle<Context>();
|
| -}
|
| -
|
| -
|
| -void Debug::Break(Arguments args, JavaScriptFrame* frame) {
|
| - Heap* heap = isolate_->heap();
|
| - HandleScope scope(isolate_);
|
| - DCHECK(args.length() == 0);
|
| -
|
| - // Initialize LiveEdit.
|
| - LiveEdit::InitializeThreadLocal(this);
|
| -
|
| - // Just continue if breaks are disabled or debugger cannot be loaded.
|
| - if (break_disabled()) return;
|
| -
|
| - // Enter the debugger.
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Postpone interrupt during breakpoint processing.
|
| - PostponeInterruptsScope postpone(isolate_);
|
| -
|
| - // Get the debug info (create it if it does not exist).
|
| - Handle<SharedFunctionInfo> shared =
|
| - Handle<SharedFunctionInfo>(frame->function()->shared());
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| -
|
| - // Find the break point where execution has stopped.
|
| - // PC points to the instruction after the current one, possibly a break
|
| - // location as well. So the "- 1" to exclude it from the search.
|
| - Address call_pc = frame->pc() - 1;
|
| - BreakLocation break_location =
|
| - BreakLocation::FromAddress(debug_info, ALL_BREAK_LOCATIONS, call_pc);
|
| -
|
| - // Check whether step next reached a new statement.
|
| - if (!StepNextContinue(&break_location, frame)) {
|
| - // Decrease steps left if performing multiple steps.
|
| - if (thread_local_.step_count_ > 0) {
|
| - thread_local_.step_count_--;
|
| - }
|
| - }
|
| -
|
| - // If there is one or more real break points check whether any of these are
|
| - // triggered.
|
| - Handle<Object> break_points_hit(heap->undefined_value(), isolate_);
|
| - if (break_location.HasBreakPoint()) {
|
| - Handle<Object> break_point_objects = break_location.BreakPointObjects();
|
| - break_points_hit = CheckBreakPoints(break_point_objects);
|
| - }
|
| -
|
| - // If step out is active skip everything until the frame where we need to step
|
| - // out to is reached, unless real breakpoint is hit.
|
| - if (StepOutActive() &&
|
| - frame->fp() != thread_local_.step_out_fp_ &&
|
| - break_points_hit->IsUndefined() ) {
|
| - // Step count should always be 0 for StepOut.
|
| - DCHECK(thread_local_.step_count_ == 0);
|
| - } else if (!break_points_hit->IsUndefined() ||
|
| - (thread_local_.last_step_action_ != StepNone &&
|
| - thread_local_.step_count_ == 0)) {
|
| - // Notify debugger if a real break point is triggered or if performing
|
| - // single stepping with no more steps to perform. Otherwise do another step.
|
| -
|
| - // Clear all current stepping setup.
|
| - ClearStepping();
|
| -
|
| - if (thread_local_.queued_step_count_ > 0) {
|
| - // Perform queued steps
|
| - int step_count = thread_local_.queued_step_count_;
|
| -
|
| - // Clear queue
|
| - thread_local_.queued_step_count_ = 0;
|
| -
|
| - PrepareStep(StepNext, step_count, StackFrame::NO_ID);
|
| - } else {
|
| - // Notify the debug event listeners.
|
| - OnDebugBreak(break_points_hit, false);
|
| - }
|
| - } else if (thread_local_.last_step_action_ != StepNone) {
|
| - // Hold on to last step action as it is cleared by the call to
|
| - // ClearStepping.
|
| - StepAction step_action = thread_local_.last_step_action_;
|
| - int step_count = thread_local_.step_count_;
|
| -
|
| - // If StepNext goes deeper in code, StepOut until original frame
|
| - // and keep step count queued up in the meantime.
|
| - if (step_action == StepNext && frame->fp() < thread_local_.last_fp_) {
|
| - // Count frames until target frame
|
| - int count = 0;
|
| - JavaScriptFrameIterator it(isolate_);
|
| - while (!it.done() && it.frame()->fp() < thread_local_.last_fp_) {
|
| - count++;
|
| - it.Advance();
|
| - }
|
| -
|
| - // Check that we indeed found the frame we are looking for.
|
| - CHECK(!it.done() && (it.frame()->fp() == thread_local_.last_fp_));
|
| - if (step_count > 1) {
|
| - // Save old count and action to continue stepping after StepOut.
|
| - thread_local_.queued_step_count_ = step_count - 1;
|
| - }
|
| -
|
| - // Set up for StepOut to reach target frame.
|
| - step_action = StepOut;
|
| - step_count = count;
|
| - }
|
| -
|
| - // Clear all current stepping setup.
|
| - ClearStepping();
|
| -
|
| - // Set up for the remaining steps.
|
| - PrepareStep(step_action, step_count, StackFrame::NO_ID);
|
| - }
|
| -}
|
| -
|
| -
|
| -// Check the break point objects for whether one or more are actually
|
| -// triggered. This function returns a JSArray with the break point objects
|
| -// which is triggered.
|
| -Handle<Object> Debug::CheckBreakPoints(Handle<Object> break_point_objects) {
|
| - Factory* factory = isolate_->factory();
|
| -
|
| - // Count the number of break points hit. If there are multiple break points
|
| - // they are in a FixedArray.
|
| - Handle<FixedArray> break_points_hit;
|
| - int break_points_hit_count = 0;
|
| - DCHECK(!break_point_objects->IsUndefined());
|
| - if (break_point_objects->IsFixedArray()) {
|
| - Handle<FixedArray> array(FixedArray::cast(*break_point_objects));
|
| - break_points_hit = factory->NewFixedArray(array->length());
|
| - for (int i = 0; i < array->length(); i++) {
|
| - Handle<Object> o(array->get(i), isolate_);
|
| - if (CheckBreakPoint(o)) {
|
| - break_points_hit->set(break_points_hit_count++, *o);
|
| - }
|
| - }
|
| - } else {
|
| - break_points_hit = factory->NewFixedArray(1);
|
| - if (CheckBreakPoint(break_point_objects)) {
|
| - break_points_hit->set(break_points_hit_count++, *break_point_objects);
|
| - }
|
| - }
|
| -
|
| - // Return undefined if no break points were triggered.
|
| - if (break_points_hit_count == 0) {
|
| - return factory->undefined_value();
|
| - }
|
| - // Return break points hit as a JSArray.
|
| - Handle<JSArray> result = factory->NewJSArrayWithElements(break_points_hit);
|
| - result->set_length(Smi::FromInt(break_points_hit_count));
|
| - return result;
|
| -}
|
| -
|
| -
|
| -// Check whether a single break point object is triggered.
|
| -bool Debug::CheckBreakPoint(Handle<Object> break_point_object) {
|
| - Factory* factory = isolate_->factory();
|
| - HandleScope scope(isolate_);
|
| -
|
| - // Ignore check if break point object is not a JSObject.
|
| - if (!break_point_object->IsJSObject()) return true;
|
| -
|
| - // Get the function IsBreakPointTriggered (defined in debug-debugger.js).
|
| - Handle<String> is_break_point_triggered_string =
|
| - factory->InternalizeOneByteString(
|
| - STATIC_CHAR_VECTOR("IsBreakPointTriggered"));
|
| - Handle<GlobalObject> debug_global(debug_context()->global_object());
|
| - Handle<JSFunction> check_break_point =
|
| - Handle<JSFunction>::cast(Object::GetProperty(
|
| - debug_global, is_break_point_triggered_string).ToHandleChecked());
|
| -
|
| - // Get the break id as an object.
|
| - Handle<Object> break_id = factory->NewNumberFromInt(Debug::break_id());
|
| -
|
| - // Call HandleBreakPointx.
|
| - Handle<Object> argv[] = { break_id, break_point_object };
|
| - Handle<Object> result;
|
| - if (!Execution::TryCall(check_break_point,
|
| - isolate_->js_builtins_object(),
|
| - arraysize(argv),
|
| - argv).ToHandle(&result)) {
|
| - return false;
|
| - }
|
| -
|
| - // Return whether the break point is triggered.
|
| - return result->IsTrue();
|
| -}
|
| -
|
| -
|
| -bool Debug::SetBreakPoint(Handle<JSFunction> function,
|
| - Handle<Object> break_point_object,
|
| - int* source_position) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - // Make sure the function is compiled and has set up the debug info.
|
| - Handle<SharedFunctionInfo> shared(function->shared());
|
| - if (!EnsureDebugInfo(shared, function)) {
|
| - // Return if retrieving debug info failed.
|
| - return true;
|
| - }
|
| -
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - // Source positions starts with zero.
|
| - DCHECK(*source_position >= 0);
|
| -
|
| - // Find the break point and change it.
|
| - BreakLocation location = BreakLocation::FromPosition(
|
| - debug_info, ALL_BREAK_LOCATIONS, *source_position, STATEMENT_ALIGNED);
|
| - *source_position = location.statement_position();
|
| - location.SetBreakPoint(break_point_object);
|
| -
|
| - // At least one active break point now.
|
| - return debug_info->GetBreakPointCount() > 0;
|
| -}
|
| -
|
| -
|
| -bool Debug::SetBreakPointForScript(Handle<Script> script,
|
| - Handle<Object> break_point_object,
|
| - int* source_position,
|
| - BreakPositionAlignment alignment) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - // Obtain shared function info for the function.
|
| - Handle<Object> result =
|
| - FindSharedFunctionInfoInScript(script, *source_position);
|
| - if (result->IsUndefined()) return false;
|
| -
|
| - // Make sure the function has set up the debug info.
|
| - Handle<SharedFunctionInfo> shared = Handle<SharedFunctionInfo>::cast(result);
|
| - if (!EnsureDebugInfo(shared, Handle<JSFunction>::null())) {
|
| - // Return if retrieving debug info failed.
|
| - return false;
|
| - }
|
| -
|
| - // Find position within function. The script position might be before the
|
| - // source position of the first function.
|
| - int position;
|
| - if (shared->start_position() > *source_position) {
|
| - position = 0;
|
| - } else {
|
| - position = *source_position - shared->start_position();
|
| - }
|
| -
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - // Source positions starts with zero.
|
| - DCHECK(position >= 0);
|
| -
|
| - // Find the break point and change it.
|
| - BreakLocation location = BreakLocation::FromPosition(
|
| - debug_info, ALL_BREAK_LOCATIONS, position, alignment);
|
| - location.SetBreakPoint(break_point_object);
|
| -
|
| - position = (alignment == STATEMENT_ALIGNED) ? location.statement_position()
|
| - : location.position();
|
| -
|
| - *source_position = position + shared->start_position();
|
| -
|
| - // At least one active break point now.
|
| - DCHECK(debug_info->GetBreakPointCount() > 0);
|
| - return true;
|
| -}
|
| -
|
| -
|
| -void Debug::ClearBreakPoint(Handle<Object> break_point_object) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - DebugInfoListNode* node = debug_info_list_;
|
| - while (node != NULL) {
|
| - Handle<Object> result =
|
| - DebugInfo::FindBreakPointInfo(node->debug_info(), break_point_object);
|
| - if (!result->IsUndefined()) {
|
| - // Get information in the break point.
|
| - Handle<BreakPointInfo> break_point_info =
|
| - Handle<BreakPointInfo>::cast(result);
|
| - Handle<DebugInfo> debug_info = node->debug_info();
|
| -
|
| - // Find the break point and clear it.
|
| - Address pc = debug_info->code()->entry() +
|
| - break_point_info->code_position()->value();
|
| -
|
| - BreakLocation location =
|
| - BreakLocation::FromAddress(debug_info, ALL_BREAK_LOCATIONS, pc);
|
| - location.ClearBreakPoint(break_point_object);
|
| -
|
| - // If there are no more break points left remove the debug info for this
|
| - // function.
|
| - if (debug_info->GetBreakPointCount() == 0) {
|
| - RemoveDebugInfoAndClearFromShared(debug_info);
|
| - }
|
| -
|
| - return;
|
| - }
|
| - node = node->next();
|
| - }
|
| -}
|
| -
|
| -
|
| -// Clear out all the debug break code. This is ONLY supposed to be used when
|
| -// shutting down the debugger as it will leave the break point information in
|
| -// DebugInfo even though the code is patched back to the non break point state.
|
| -void Debug::ClearAllBreakPoints() {
|
| - for (DebugInfoListNode* node = debug_info_list_; node != NULL;
|
| - node = node->next()) {
|
| - for (BreakLocation::Iterator it(node->debug_info(), ALL_BREAK_LOCATIONS);
|
| - !it.Done(); it.Next()) {
|
| - it.GetBreakLocation().ClearDebugBreak();
|
| - }
|
| - }
|
| - // Remove all debug info.
|
| - while (debug_info_list_ != NULL) {
|
| - RemoveDebugInfoAndClearFromShared(debug_info_list_->debug_info());
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::FloodWithOneShot(Handle<JSFunction> function,
|
| - BreakLocatorType type) {
|
| - // Make sure the function is compiled and has set up the debug info.
|
| - Handle<SharedFunctionInfo> shared(function->shared());
|
| - if (!EnsureDebugInfo(shared, function)) {
|
| - // Return if we failed to retrieve the debug info.
|
| - return;
|
| - }
|
| -
|
| - // Flood the function with break points.
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - for (BreakLocation::Iterator it(debug_info, type); !it.Done(); it.Next()) {
|
| - it.GetBreakLocation().SetOneShot();
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::FloodBoundFunctionWithOneShot(Handle<JSFunction> function) {
|
| - Handle<FixedArray> new_bindings(function->function_bindings());
|
| - Handle<Object> bindee(new_bindings->get(JSFunction::kBoundFunctionIndex),
|
| - isolate_);
|
| -
|
| - if (!bindee.is_null() && bindee->IsJSFunction()) {
|
| - Handle<JSFunction> bindee_function(JSFunction::cast(*bindee));
|
| - FloodWithOneShotGeneric(bindee_function);
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::FloodDefaultConstructorWithOneShot(Handle<JSFunction> function) {
|
| - DCHECK(function->shared()->is_default_constructor());
|
| - // Instead of stepping into the function we directly step into the super class
|
| - // constructor.
|
| - Isolate* isolate = function->GetIsolate();
|
| - PrototypeIterator iter(isolate, function);
|
| - Handle<Object> proto = PrototypeIterator::GetCurrent(iter);
|
| - if (!proto->IsJSFunction()) return; // Object.prototype
|
| - Handle<JSFunction> function_proto = Handle<JSFunction>::cast(proto);
|
| - FloodWithOneShotGeneric(function_proto);
|
| -}
|
| -
|
| -
|
| -void Debug::FloodWithOneShotGeneric(Handle<JSFunction> function,
|
| - Handle<Object> holder) {
|
| - if (function->shared()->bound()) {
|
| - FloodBoundFunctionWithOneShot(function);
|
| - } else if (function->shared()->is_default_constructor()) {
|
| - FloodDefaultConstructorWithOneShot(function);
|
| - } else {
|
| - Isolate* isolate = function->GetIsolate();
|
| - // Don't allow step into functions in the native context.
|
| - if (function->shared()->code() ==
|
| - isolate->builtins()->builtin(Builtins::kFunctionApply) ||
|
| - function->shared()->code() ==
|
| - isolate->builtins()->builtin(Builtins::kFunctionCall)) {
|
| - // Handle function.apply and function.call separately to flood the
|
| - // function to be called and not the code for Builtins::FunctionApply or
|
| - // Builtins::FunctionCall. The receiver of call/apply is the target
|
| - // function.
|
| - if (!holder.is_null() && holder->IsJSFunction()) {
|
| - Handle<JSFunction> js_function = Handle<JSFunction>::cast(holder);
|
| - FloodWithOneShotGeneric(js_function);
|
| - }
|
| - } else {
|
| - FloodWithOneShot(function);
|
| - }
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::FloodHandlerWithOneShot() {
|
| - // Iterate through the JavaScript stack looking for handlers.
|
| - StackFrame::Id id = break_frame_id();
|
| - if (id == StackFrame::NO_ID) {
|
| - // If there is no JavaScript stack don't do anything.
|
| - return;
|
| - }
|
| - for (JavaScriptFrameIterator it(isolate_, id); !it.done(); it.Advance()) {
|
| - JavaScriptFrame* frame = it.frame();
|
| - int stack_slots = 0; // The computed stack slot count is not used.
|
| - if (frame->LookupExceptionHandlerInTable(&stack_slots, NULL) > 0) {
|
| - // Flood the function with the catch/finally block with break points.
|
| - FloodWithOneShot(Handle<JSFunction>(frame->function()));
|
| - return;
|
| - }
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::ChangeBreakOnException(ExceptionBreakType type, bool enable) {
|
| - if (type == BreakUncaughtException) {
|
| - break_on_uncaught_exception_ = enable;
|
| - } else {
|
| - break_on_exception_ = enable;
|
| - }
|
| -}
|
| -
|
| -
|
| -bool Debug::IsBreakOnException(ExceptionBreakType type) {
|
| - if (type == BreakUncaughtException) {
|
| - return break_on_uncaught_exception_;
|
| - } else {
|
| - return break_on_exception_;
|
| - }
|
| -}
|
| -
|
| -
|
| -FrameSummary GetFirstFrameSummary(JavaScriptFrame* frame) {
|
| - List<FrameSummary> frames(FLAG_max_inlining_levels + 1);
|
| - frame->Summarize(&frames);
|
| - return frames.first();
|
| -}
|
| -
|
| -
|
| -void Debug::PrepareStep(StepAction step_action,
|
| - int step_count,
|
| - StackFrame::Id frame_id) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - DCHECK(in_debug_scope());
|
| -
|
| - // Remember this step action and count.
|
| - thread_local_.last_step_action_ = step_action;
|
| - if (step_action == StepOut) {
|
| - // For step out target frame will be found on the stack so there is no need
|
| - // to set step counter for it. It's expected to always be 0 for StepOut.
|
| - thread_local_.step_count_ = 0;
|
| - } else {
|
| - thread_local_.step_count_ = step_count;
|
| - }
|
| -
|
| - // Get the frame where the execution has stopped and skip the debug frame if
|
| - // any. The debug frame will only be present if execution was stopped due to
|
| - // hitting a break point. In other situations (e.g. unhandled exception) the
|
| - // debug frame is not present.
|
| - StackFrame::Id id = break_frame_id();
|
| - if (id == StackFrame::NO_ID) {
|
| - // If there is no JavaScript stack don't do anything.
|
| - return;
|
| - }
|
| - if (frame_id != StackFrame::NO_ID) {
|
| - id = frame_id;
|
| - }
|
| - JavaScriptFrameIterator frames_it(isolate_, id);
|
| - JavaScriptFrame* frame = frames_it.frame();
|
| -
|
| - // First of all ensure there is one-shot break points in the top handler
|
| - // if any.
|
| - FloodHandlerWithOneShot();
|
| -
|
| - // If the function on the top frame is unresolved perform step out. This will
|
| - // be the case when calling unknown function and having the debugger stopped
|
| - // in an unhandled exception.
|
| - if (!frame->function()->IsJSFunction()) {
|
| - // Step out: Find the calling JavaScript frame and flood it with
|
| - // breakpoints.
|
| - frames_it.Advance();
|
| - // Fill the function to return to with one-shot break points.
|
| - JSFunction* function = frames_it.frame()->function();
|
| - FloodWithOneShot(Handle<JSFunction>(function));
|
| - return;
|
| - }
|
| -
|
| - // Get the debug info (create it if it does not exist).
|
| - FrameSummary summary = GetFirstFrameSummary(frame);
|
| - Handle<JSFunction> function(summary.function());
|
| - Handle<SharedFunctionInfo> shared(function->shared());
|
| - if (!EnsureDebugInfo(shared, function)) {
|
| - // Return if ensuring debug info failed.
|
| - return;
|
| - }
|
| -
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - // Refresh frame summary if the code has been recompiled for debugging.
|
| - if (shared->code() != *summary.code()) summary = GetFirstFrameSummary(frame);
|
| -
|
| - // PC points to the instruction after the current one, possibly a break
|
| - // location as well. So the "- 1" to exclude it from the search.
|
| - Address call_pc = summary.pc() - 1;
|
| - BreakLocation location =
|
| - BreakLocation::FromAddress(debug_info, ALL_BREAK_LOCATIONS, call_pc);
|
| -
|
| - // If this is the last break code target step out is the only possibility.
|
| - if (location.IsReturn() || step_action == StepOut) {
|
| - if (step_action == StepOut) {
|
| - // Skip step_count frames starting with the current one.
|
| - while (step_count-- > 0 && !frames_it.done()) {
|
| - frames_it.Advance();
|
| - }
|
| - } else {
|
| - DCHECK(location.IsReturn());
|
| - frames_it.Advance();
|
| - }
|
| - // Skip native and extension functions on the stack.
|
| - while (!frames_it.done() &&
|
| - !frames_it.frame()->function()->IsSubjectToDebugging()) {
|
| - frames_it.Advance();
|
| - }
|
| - // Step out: If there is a JavaScript caller frame, we need to
|
| - // flood it with breakpoints.
|
| - if (!frames_it.done()) {
|
| - // Fill the function to return to with one-shot break points.
|
| - JSFunction* function = frames_it.frame()->function();
|
| - FloodWithOneShot(Handle<JSFunction>(function));
|
| - // Set target frame pointer.
|
| - ActivateStepOut(frames_it.frame());
|
| - }
|
| - return;
|
| - }
|
| -
|
| - if (step_action != StepNext && step_action != StepMin) {
|
| - // If there's restarter frame on top of the stack, just get the pointer
|
| - // to function which is going to be restarted.
|
| - if (thread_local_.restarter_frame_function_pointer_ != NULL) {
|
| - Handle<JSFunction> restarted_function(
|
| - JSFunction::cast(*thread_local_.restarter_frame_function_pointer_));
|
| - FloodWithOneShot(restarted_function);
|
| - } else if (location.IsCall()) {
|
| - // Find target function on the expression stack.
|
| - // Expression stack looks like this (top to bottom):
|
| - // argN
|
| - // ...
|
| - // arg0
|
| - // Receiver
|
| - // Function to call
|
| - int num_expressions_without_args =
|
| - frame->ComputeExpressionsCount() - location.CallArgumentsCount();
|
| - DCHECK(num_expressions_without_args >= 2);
|
| - Object* fun = frame->GetExpression(num_expressions_without_args - 2);
|
| -
|
| - // Flood the actual target of call/apply.
|
| - if (fun->IsJSFunction()) {
|
| - Isolate* isolate = JSFunction::cast(fun)->GetIsolate();
|
| - Code* apply = isolate->builtins()->builtin(Builtins::kFunctionApply);
|
| - Code* call = isolate->builtins()->builtin(Builtins::kFunctionCall);
|
| - // Find target function on the expression stack for expression like
|
| - // Function.call.call...apply(...)
|
| - int i = 1;
|
| - while (fun->IsJSFunction()) {
|
| - Code* code = JSFunction::cast(fun)->shared()->code();
|
| - if (code != apply && code != call) break;
|
| - DCHECK(num_expressions_without_args >= i);
|
| - fun = frame->GetExpression(num_expressions_without_args - i);
|
| - i--;
|
| - }
|
| - }
|
| -
|
| - if (fun->IsJSFunction()) {
|
| - Handle<JSFunction> js_function(JSFunction::cast(fun));
|
| - FloodWithOneShotGeneric(js_function);
|
| - }
|
| - }
|
| -
|
| - ActivateStepIn(frame);
|
| - }
|
| -
|
| - // Fill the current function with one-shot break points even for step in on
|
| - // a call target as the function called might be a native function for
|
| - // which step in will not stop. It also prepares for stepping in
|
| - // getters/setters.
|
| - // If we are stepping into another frame, only fill calls and returns.
|
| - FloodWithOneShot(function, step_action == StepFrame ? CALLS_AND_RETURNS
|
| - : ALL_BREAK_LOCATIONS);
|
| -
|
| - // Remember source position and frame to handle step next.
|
| - thread_local_.last_statement_position_ =
|
| - debug_info->code()->SourceStatementPosition(summary.pc());
|
| - thread_local_.last_fp_ = frame->UnpaddedFP();
|
| -}
|
| -
|
| -
|
| -// Check whether the current debug break should be reported to the debugger. It
|
| -// is used to have step next and step in only report break back to the debugger
|
| -// if on a different frame or in a different statement. In some situations
|
| -// there will be several break points in the same statement when the code is
|
| -// flooded with one-shot break points. This function helps to perform several
|
| -// steps before reporting break back to the debugger.
|
| -bool Debug::StepNextContinue(BreakLocation* break_location,
|
| - JavaScriptFrame* frame) {
|
| - // StepNext and StepOut shouldn't bring us deeper in code, so last frame
|
| - // shouldn't be a parent of current frame.
|
| - StepAction step_action = thread_local_.last_step_action_;
|
| -
|
| - if (step_action == StepNext || step_action == StepOut) {
|
| - if (frame->fp() < thread_local_.last_fp_) return true;
|
| - }
|
| -
|
| - // We stepped into a new frame if the frame pointer changed.
|
| - if (step_action == StepFrame) {
|
| - return frame->UnpaddedFP() == thread_local_.last_fp_;
|
| - }
|
| -
|
| - // If the step last action was step next or step in make sure that a new
|
| - // statement is hit.
|
| - if (step_action == StepNext || step_action == StepIn) {
|
| - // Never continue if returning from function.
|
| - if (break_location->IsReturn()) return false;
|
| -
|
| - // Continue if we are still on the same frame and in the same statement.
|
| - int current_statement_position =
|
| - break_location->code()->SourceStatementPosition(frame->pc());
|
| - return thread_local_.last_fp_ == frame->UnpaddedFP() &&
|
| - thread_local_.last_statement_position_ == current_statement_position;
|
| - }
|
| -
|
| - // No step next action - don't continue.
|
| - return false;
|
| -}
|
| -
|
| -
|
| -// Check whether the code object at the specified address is a debug break code
|
| -// object.
|
| -bool Debug::IsDebugBreak(Address addr) {
|
| - Code* code = Code::GetCodeFromTargetAddress(addr);
|
| - return code->is_debug_stub();
|
| -}
|
| -
|
| -
|
| -// Simple function for returning the source positions for active break points.
|
| -Handle<Object> Debug::GetSourceBreakLocations(
|
| - Handle<SharedFunctionInfo> shared,
|
| - BreakPositionAlignment position_alignment) {
|
| - Isolate* isolate = shared->GetIsolate();
|
| - Heap* heap = isolate->heap();
|
| - if (!shared->HasDebugInfo()) {
|
| - return Handle<Object>(heap->undefined_value(), isolate);
|
| - }
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - if (debug_info->GetBreakPointCount() == 0) {
|
| - return Handle<Object>(heap->undefined_value(), isolate);
|
| - }
|
| - Handle<FixedArray> locations =
|
| - isolate->factory()->NewFixedArray(debug_info->GetBreakPointCount());
|
| - int count = 0;
|
| - for (int i = 0; i < debug_info->break_points()->length(); ++i) {
|
| - if (!debug_info->break_points()->get(i)->IsUndefined()) {
|
| - BreakPointInfo* break_point_info =
|
| - BreakPointInfo::cast(debug_info->break_points()->get(i));
|
| - int break_points = break_point_info->GetBreakPointCount();
|
| - if (break_points == 0) continue;
|
| - Smi* position = NULL;
|
| - switch (position_alignment) {
|
| - case STATEMENT_ALIGNED:
|
| - position = break_point_info->statement_position();
|
| - break;
|
| - case BREAK_POSITION_ALIGNED:
|
| - position = break_point_info->source_position();
|
| - break;
|
| - }
|
| - for (int j = 0; j < break_points; ++j) locations->set(count++, position);
|
| - }
|
| - }
|
| - return locations;
|
| -}
|
| -
|
| -
|
| -// Handle stepping into a function.
|
| -void Debug::HandleStepIn(Handle<Object> function_obj, bool is_constructor) {
|
| - // Flood getter/setter if we either step in or step to another frame.
|
| - bool step_frame = thread_local_.last_step_action_ == StepFrame;
|
| - if (!StepInActive() && !step_frame) return;
|
| - if (!function_obj->IsJSFunction()) return;
|
| - Handle<JSFunction> function = Handle<JSFunction>::cast(function_obj);
|
| - Isolate* isolate = function->GetIsolate();
|
| -
|
| - StackFrameIterator it(isolate);
|
| - it.Advance();
|
| - // For constructor functions skip another frame.
|
| - if (is_constructor) {
|
| - DCHECK(it.frame()->is_construct());
|
| - it.Advance();
|
| - }
|
| - Address fp = it.frame()->fp();
|
| -
|
| - // Flood the function with one-shot break points if it is called from where
|
| - // step into was requested, or when stepping into a new frame.
|
| - if (fp == thread_local_.step_into_fp_ || step_frame) {
|
| - FloodWithOneShotGeneric(function, Handle<Object>());
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::ClearStepping() {
|
| - // Clear the various stepping setup.
|
| - ClearOneShot();
|
| - ClearStepIn();
|
| - ClearStepOut();
|
| - ClearStepNext();
|
| -
|
| - // Clear multiple step counter.
|
| - thread_local_.step_count_ = 0;
|
| -}
|
| -
|
| -
|
| -// Clears all the one-shot break points that are currently set. Normally this
|
| -// function is called each time a break point is hit as one shot break points
|
| -// are used to support stepping.
|
| -void Debug::ClearOneShot() {
|
| - // The current implementation just runs through all the breakpoints. When the
|
| - // last break point for a function is removed that function is automatically
|
| - // removed from the list.
|
| - for (DebugInfoListNode* node = debug_info_list_; node != NULL;
|
| - node = node->next()) {
|
| - for (BreakLocation::Iterator it(node->debug_info(), ALL_BREAK_LOCATIONS);
|
| - !it.Done(); it.Next()) {
|
| - it.GetBreakLocation().ClearOneShot();
|
| - }
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::ActivateStepIn(StackFrame* frame) {
|
| - DCHECK(!StepOutActive());
|
| - thread_local_.step_into_fp_ = frame->UnpaddedFP();
|
| -}
|
| -
|
| -
|
| -void Debug::ClearStepIn() {
|
| - thread_local_.step_into_fp_ = 0;
|
| -}
|
| -
|
| -
|
| -void Debug::ActivateStepOut(StackFrame* frame) {
|
| - DCHECK(!StepInActive());
|
| - thread_local_.step_out_fp_ = frame->UnpaddedFP();
|
| -}
|
| -
|
| -
|
| -void Debug::ClearStepOut() {
|
| - thread_local_.step_out_fp_ = 0;
|
| -}
|
| -
|
| -
|
| -void Debug::ClearStepNext() {
|
| - thread_local_.last_step_action_ = StepNone;
|
| - thread_local_.last_statement_position_ = RelocInfo::kNoPosition;
|
| - thread_local_.last_fp_ = 0;
|
| -}
|
| -
|
| -
|
| -bool MatchingCodeTargets(Code* target1, Code* target2) {
|
| - if (target1 == target2) return true;
|
| - if (target1->kind() != target2->kind()) return false;
|
| - return target1->is_handler() || target1->is_inline_cache_stub();
|
| -}
|
| -
|
| -
|
| -// Count the number of calls before the current frame PC to find the
|
| -// corresponding PC in the newly recompiled code.
|
| -static Address ComputeNewPcForRedirect(Code* new_code, Code* old_code,
|
| - Address old_pc) {
|
| - DCHECK_EQ(old_code->kind(), Code::FUNCTION);
|
| - DCHECK_EQ(new_code->kind(), Code::FUNCTION);
|
| - DCHECK(new_code->has_debug_break_slots());
|
| - static const int mask = RelocInfo::kCodeTargetMask;
|
| -
|
| - // Find the target of the current call.
|
| - Code* target = NULL;
|
| - intptr_t delta = 0;
|
| - for (RelocIterator it(old_code, mask); !it.done(); it.next()) {
|
| - RelocInfo* rinfo = it.rinfo();
|
| - Address current_pc = rinfo->pc();
|
| - // The frame PC is behind the call instruction by the call instruction size.
|
| - if (current_pc > old_pc) break;
|
| - delta = old_pc - current_pc;
|
| - target = Code::GetCodeFromTargetAddress(rinfo->target_address());
|
| - }
|
| -
|
| - // Count the number of calls to the same target before the current call.
|
| - int index = 0;
|
| - for (RelocIterator it(old_code, mask); !it.done(); it.next()) {
|
| - RelocInfo* rinfo = it.rinfo();
|
| - Address current_pc = rinfo->pc();
|
| - if (current_pc > old_pc) break;
|
| - Code* current = Code::GetCodeFromTargetAddress(rinfo->target_address());
|
| - if (MatchingCodeTargets(target, current)) index++;
|
| - }
|
| -
|
| - DCHECK(index > 0);
|
| -
|
| - // Repeat the count on the new code to find corresponding call.
|
| - for (RelocIterator it(new_code, mask); !it.done(); it.next()) {
|
| - RelocInfo* rinfo = it.rinfo();
|
| - Code* current = Code::GetCodeFromTargetAddress(rinfo->target_address());
|
| - if (MatchingCodeTargets(target, current)) index--;
|
| - if (index == 0) return rinfo->pc() + delta;
|
| - }
|
| -
|
| - UNREACHABLE();
|
| - return NULL;
|
| -}
|
| -
|
| -
|
| -// Count the number of continuations at which the current pc offset is at.
|
| -static int ComputeContinuationIndexFromPcOffset(Code* code, int pc_offset) {
|
| - DCHECK_EQ(code->kind(), Code::FUNCTION);
|
| - Address pc = code->instruction_start() + pc_offset;
|
| - int mask = RelocInfo::ModeMask(RelocInfo::GENERATOR_CONTINUATION);
|
| - int index = 0;
|
| - for (RelocIterator it(code, mask); !it.done(); it.next()) {
|
| - index++;
|
| - RelocInfo* rinfo = it.rinfo();
|
| - Address current_pc = rinfo->pc();
|
| - if (current_pc == pc) break;
|
| - DCHECK(current_pc < pc);
|
| - }
|
| - return index;
|
| -}
|
| -
|
| -
|
| -// Find the pc offset for the given continuation index.
|
| -static int ComputePcOffsetFromContinuationIndex(Code* code, int index) {
|
| - DCHECK_EQ(code->kind(), Code::FUNCTION);
|
| - DCHECK(code->has_debug_break_slots());
|
| - int mask = RelocInfo::ModeMask(RelocInfo::GENERATOR_CONTINUATION);
|
| - RelocIterator it(code, mask);
|
| - for (int i = 1; i < index; i++) it.next();
|
| - return static_cast<int>(it.rinfo()->pc() - code->instruction_start());
|
| -}
|
| -
|
| -
|
| -class RedirectActiveFunctions : public ThreadVisitor {
|
| - public:
|
| - explicit RedirectActiveFunctions(SharedFunctionInfo* shared)
|
| - : shared_(shared) {
|
| - DCHECK(shared->HasDebugCode());
|
| - }
|
| -
|
| - void VisitThread(Isolate* isolate, ThreadLocalTop* top) {
|
| - for (JavaScriptFrameIterator it(isolate, top); !it.done(); it.Advance()) {
|
| - JavaScriptFrame* frame = it.frame();
|
| - JSFunction* function = frame->function();
|
| - if (frame->is_optimized()) continue;
|
| - if (!function->Inlines(shared_)) continue;
|
| -
|
| - Code* frame_code = frame->LookupCode();
|
| - DCHECK(frame_code->kind() == Code::FUNCTION);
|
| - if (frame_code->has_debug_break_slots()) continue;
|
| -
|
| - Code* new_code = function->shared()->code();
|
| - Address old_pc = frame->pc();
|
| - Address new_pc = ComputeNewPcForRedirect(new_code, frame_code, old_pc);
|
| -
|
| - if (FLAG_trace_deopt) {
|
| - PrintF("Replacing pc for debugging: %08" V8PRIxPTR " => %08" V8PRIxPTR
|
| - "\n",
|
| - reinterpret_cast<intptr_t>(old_pc),
|
| - reinterpret_cast<intptr_t>(new_pc));
|
| - }
|
| -
|
| - if (FLAG_enable_embedded_constant_pool) {
|
| - // Update constant pool pointer for new code.
|
| - frame->set_constant_pool(new_code->constant_pool());
|
| - }
|
| -
|
| - // Patch the return address to return into the code with
|
| - // debug break slots.
|
| - frame->set_pc(new_pc);
|
| - }
|
| - }
|
| -
|
| - private:
|
| - SharedFunctionInfo* shared_;
|
| - DisallowHeapAllocation no_gc_;
|
| -};
|
| -
|
| -
|
| -bool Debug::PrepareFunctionForBreakPoints(Handle<SharedFunctionInfo> shared) {
|
| - DCHECK(shared->is_compiled());
|
| -
|
| - if (isolate_->concurrent_recompilation_enabled()) {
|
| - isolate_->optimizing_compile_dispatcher()->Flush();
|
| - }
|
| -
|
| - List<Handle<JSFunction> > functions;
|
| - List<Handle<JSGeneratorObject> > suspended_generators;
|
| -
|
| - if (!shared->optimized_code_map()->IsSmi()) {
|
| - shared->ClearOptimizedCodeMap();
|
| - }
|
| -
|
| - // Make sure we abort incremental marking.
|
| - isolate_->heap()->CollectAllGarbage(Heap::kMakeHeapIterableMask,
|
| - "prepare for break points");
|
| -
|
| - {
|
| - HeapIterator iterator(isolate_->heap());
|
| - HeapObject* obj;
|
| - bool include_generators = shared->is_generator();
|
| -
|
| - while ((obj = iterator.next())) {
|
| - if (obj->IsJSFunction()) {
|
| - JSFunction* function = JSFunction::cast(obj);
|
| - if (!function->Inlines(*shared)) continue;
|
| - if (function->code()->kind() == Code::OPTIMIZED_FUNCTION) {
|
| - Deoptimizer::DeoptimizeFunction(function);
|
| - }
|
| - if (function->shared() == *shared) functions.Add(handle(function));
|
| - } else if (include_generators && obj->IsJSGeneratorObject()) {
|
| - JSGeneratorObject* generator_obj = JSGeneratorObject::cast(obj);
|
| - if (!generator_obj->is_suspended()) continue;
|
| - JSFunction* function = generator_obj->function();
|
| - if (!function->Inlines(*shared)) continue;
|
| - int pc_offset = generator_obj->continuation();
|
| - int index =
|
| - ComputeContinuationIndexFromPcOffset(function->code(), pc_offset);
|
| - generator_obj->set_continuation(index);
|
| - suspended_generators.Add(handle(generator_obj));
|
| - }
|
| - }
|
| - }
|
| -
|
| - if (!shared->HasDebugCode()) {
|
| - DCHECK(functions.length() > 0);
|
| - if (!Compiler::CompileDebugCode(functions.first())) return false;
|
| - }
|
| -
|
| - for (Handle<JSFunction> const function : functions) {
|
| - function->ReplaceCode(shared->code());
|
| - }
|
| -
|
| - for (Handle<JSGeneratorObject> const generator_obj : suspended_generators) {
|
| - int index = generator_obj->continuation();
|
| - int pc_offset = ComputePcOffsetFromContinuationIndex(shared->code(), index);
|
| - generator_obj->set_continuation(pc_offset);
|
| - }
|
| -
|
| - // Update PCs on the stack to point to recompiled code.
|
| - RedirectActiveFunctions redirect_visitor(*shared);
|
| - redirect_visitor.VisitThread(isolate_, isolate_->thread_local_top());
|
| - isolate_->thread_manager()->IterateArchivedThreads(&redirect_visitor);
|
| -
|
| - return true;
|
| -}
|
| -
|
| -
|
| -class SharedFunctionInfoFinder {
|
| - public:
|
| - explicit SharedFunctionInfoFinder(int target_position)
|
| - : current_candidate_(NULL),
|
| - current_candidate_closure_(NULL),
|
| - current_start_position_(RelocInfo::kNoPosition),
|
| - target_position_(target_position) {}
|
| -
|
| - void NewCandidate(SharedFunctionInfo* shared, JSFunction* closure = NULL) {
|
| - int start_position = shared->function_token_position();
|
| - if (start_position == RelocInfo::kNoPosition) {
|
| - start_position = shared->start_position();
|
| - }
|
| -
|
| - if (start_position > target_position_) return;
|
| - if (target_position_ > shared->end_position()) return;
|
| -
|
| - if (current_candidate_ != NULL) {
|
| - if (current_start_position_ == start_position &&
|
| - shared->end_position() == current_candidate_->end_position()) {
|
| - // If a top-level function contains only one function
|
| - // declaration the source for the top-level and the function
|
| - // is the same. In that case prefer the non top-level function.
|
| - if (shared->is_toplevel()) return;
|
| - } else if (start_position < current_start_position_ ||
|
| - current_candidate_->end_position() < shared->end_position()) {
|
| - return;
|
| - }
|
| - }
|
| -
|
| - current_start_position_ = start_position;
|
| - current_candidate_ = shared;
|
| - current_candidate_closure_ = closure;
|
| - }
|
| -
|
| - SharedFunctionInfo* Result() { return current_candidate_; }
|
| -
|
| - JSFunction* ResultClosure() { return current_candidate_closure_; }
|
| -
|
| - private:
|
| - SharedFunctionInfo* current_candidate_;
|
| - JSFunction* current_candidate_closure_;
|
| - int current_start_position_;
|
| - int target_position_;
|
| - DisallowHeapAllocation no_gc_;
|
| -};
|
| -
|
| -
|
| -// We need to find a SFI for a literal that may not yet have been compiled yet,
|
| -// and there may not be a JSFunction referencing it. Find the SFI closest to
|
| -// the given position, compile it to reveal possible inner SFIs and repeat.
|
| -// While we are at this, also ensure code with debug break slots so that we do
|
| -// not have to compile a SFI without JSFunction, which is paifu for those that
|
| -// cannot be compiled without context (need to find outer compilable SFI etc.)
|
| -Handle<Object> Debug::FindSharedFunctionInfoInScript(Handle<Script> script,
|
| - int position) {
|
| - while (true) {
|
| - // Go through all shared function infos associated with this script to
|
| - // find the inner most function containing this position.
|
| - if (!script->shared_function_infos()->IsWeakFixedArray()) break;
|
| - WeakFixedArray* array =
|
| - WeakFixedArray::cast(script->shared_function_infos());
|
| -
|
| - SharedFunctionInfo* shared;
|
| - {
|
| - SharedFunctionInfoFinder finder(position);
|
| - for (int i = 0; i < array->Length(); i++) {
|
| - Object* item = array->Get(i);
|
| - if (!item->IsSharedFunctionInfo()) continue;
|
| - finder.NewCandidate(SharedFunctionInfo::cast(item));
|
| - }
|
| - shared = finder.Result();
|
| - if (shared == NULL) break;
|
| - // We found it if it's already compiled and has debug code.
|
| - if (shared->HasDebugCode()) return handle(shared);
|
| - }
|
| - // If not, compile to reveal inner functions, if possible.
|
| - if (shared->allows_lazy_compilation_without_context()) {
|
| - HandleScope scope(isolate_);
|
| - if (!Compiler::CompileDebugCode(handle(shared))) break;
|
| - continue;
|
| - }
|
| -
|
| - // If not possible, comb the heap for the best suitable compile target.
|
| - JSFunction* closure;
|
| - {
|
| - HeapIterator it(isolate_->heap());
|
| - SharedFunctionInfoFinder finder(position);
|
| - while (HeapObject* object = it.next()) {
|
| - JSFunction* candidate_closure = NULL;
|
| - SharedFunctionInfo* candidate = NULL;
|
| - if (object->IsJSFunction()) {
|
| - candidate_closure = JSFunction::cast(object);
|
| - candidate = candidate_closure->shared();
|
| - } else if (object->IsSharedFunctionInfo()) {
|
| - candidate = SharedFunctionInfo::cast(object);
|
| - if (!candidate->allows_lazy_compilation_without_context()) continue;
|
| - } else {
|
| - continue;
|
| - }
|
| - if (candidate->script() == *script) {
|
| - finder.NewCandidate(candidate, candidate_closure);
|
| - }
|
| - }
|
| - closure = finder.ResultClosure();
|
| - shared = finder.Result();
|
| - }
|
| - HandleScope scope(isolate_);
|
| - if (closure == NULL) {
|
| - if (!Compiler::CompileDebugCode(handle(shared))) break;
|
| - } else {
|
| - if (!Compiler::CompileDebugCode(handle(closure))) break;
|
| - }
|
| - }
|
| - return isolate_->factory()->undefined_value();
|
| -}
|
| -
|
| -
|
| -// Ensures the debug information is present for shared.
|
| -bool Debug::EnsureDebugInfo(Handle<SharedFunctionInfo> shared,
|
| - Handle<JSFunction> function) {
|
| - if (!shared->IsSubjectToDebugging()) return false;
|
| -
|
| - // Return if we already have the debug info for shared.
|
| - if (shared->HasDebugInfo()) return true;
|
| -
|
| - if (function.is_null()) {
|
| - DCHECK(shared->HasDebugCode());
|
| - } else if (!Compiler::EnsureCompiled(function, CLEAR_EXCEPTION)) {
|
| - return false;
|
| - }
|
| -
|
| - if (!PrepareFunctionForBreakPoints(shared)) return false;
|
| -
|
| - // Make sure IC state is clean. This is so that we correctly flood
|
| - // accessor pairs when stepping in.
|
| - shared->code()->ClearInlineCaches();
|
| - shared->feedback_vector()->ClearICSlots(*shared);
|
| -
|
| - // Create the debug info object.
|
| - DCHECK(shared->HasDebugCode());
|
| - Handle<DebugInfo> debug_info = isolate_->factory()->NewDebugInfo(shared);
|
| -
|
| - // Add debug info to the list.
|
| - DebugInfoListNode* node = new DebugInfoListNode(*debug_info);
|
| - node->set_next(debug_info_list_);
|
| - debug_info_list_ = node;
|
| -
|
| - return true;
|
| -}
|
| -
|
| -
|
| -void Debug::RemoveDebugInfoAndClearFromShared(Handle<DebugInfo> debug_info) {
|
| - HandleScope scope(isolate_);
|
| - Handle<SharedFunctionInfo> shared(debug_info->shared());
|
| -
|
| - DCHECK_NOT_NULL(debug_info_list_);
|
| - // Run through the debug info objects to find this one and remove it.
|
| - DebugInfoListNode* prev = NULL;
|
| - DebugInfoListNode* current = debug_info_list_;
|
| - while (current != NULL) {
|
| - if (current->debug_info().is_identical_to(debug_info)) {
|
| - // Unlink from list. If prev is NULL we are looking at the first element.
|
| - if (prev == NULL) {
|
| - debug_info_list_ = current->next();
|
| - } else {
|
| - prev->set_next(current->next());
|
| - }
|
| - delete current;
|
| - shared->set_debug_info(isolate_->heap()->undefined_value());
|
| - return;
|
| - }
|
| - // Move to next in list.
|
| - prev = current;
|
| - current = current->next();
|
| - }
|
| -
|
| - UNREACHABLE();
|
| -}
|
| -
|
| -
|
| -void Debug::SetAfterBreakTarget(JavaScriptFrame* frame) {
|
| - after_break_target_ = NULL;
|
| -
|
| - if (LiveEdit::SetAfterBreakTarget(this)) return; // LiveEdit did the job.
|
| -
|
| - // Continue just after the slot.
|
| - after_break_target_ = frame->pc();
|
| -}
|
| -
|
| -
|
| -bool Debug::IsBreakAtReturn(JavaScriptFrame* frame) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - // Get the executing function in which the debug break occurred.
|
| - Handle<JSFunction> function(JSFunction::cast(frame->function()));
|
| - Handle<SharedFunctionInfo> shared(function->shared());
|
| -
|
| - // With no debug info there are no break points, so we can't be at a return.
|
| - if (!shared->HasDebugInfo()) return false;
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - Handle<Code> code(debug_info->code());
|
| -#ifdef DEBUG
|
| - // Get the code which is actually executing.
|
| - Handle<Code> frame_code(frame->LookupCode());
|
| - DCHECK(frame_code.is_identical_to(code));
|
| -#endif
|
| -
|
| - // Find the reloc info matching the start of the debug break slot.
|
| - Address slot_pc = frame->pc() - Assembler::kDebugBreakSlotLength;
|
| - int mask = RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT_AT_RETURN);
|
| - for (RelocIterator it(*code, mask); !it.done(); it.next()) {
|
| - if (it.rinfo()->pc() == slot_pc) return true;
|
| - }
|
| - return false;
|
| -}
|
| -
|
| -
|
| -void Debug::FramesHaveBeenDropped(StackFrame::Id new_break_frame_id,
|
| - LiveEdit::FrameDropMode mode,
|
| - Object** restarter_frame_function_pointer) {
|
| - if (mode != LiveEdit::CURRENTLY_SET_MODE) {
|
| - thread_local_.frame_drop_mode_ = mode;
|
| - }
|
| - thread_local_.break_frame_id_ = new_break_frame_id;
|
| - thread_local_.restarter_frame_function_pointer_ =
|
| - restarter_frame_function_pointer;
|
| -}
|
| -
|
| -
|
| -bool Debug::IsDebugGlobal(GlobalObject* global) {
|
| - return is_loaded() && global == debug_context()->global_object();
|
| -}
|
| -
|
| -
|
| -void Debug::ClearMirrorCache() {
|
| - PostponeInterruptsScope postpone(isolate_);
|
| - HandleScope scope(isolate_);
|
| - AssertDebugContext();
|
| - Factory* factory = isolate_->factory();
|
| - Handle<GlobalObject> global(isolate_->global_object());
|
| - JSObject::SetProperty(global,
|
| - factory->NewStringFromAsciiChecked("next_handle_"),
|
| - handle(Smi::FromInt(0), isolate_), SLOPPY).Check();
|
| - JSObject::SetProperty(global,
|
| - factory->NewStringFromAsciiChecked("mirror_cache_"),
|
| - factory->NewJSArray(0, FAST_ELEMENTS), SLOPPY).Check();
|
| -}
|
| -
|
| -
|
| -Handle<FixedArray> Debug::GetLoadedScripts() {
|
| - // Create and fill the script cache when the loaded scripts is requested for
|
| - // the first time.
|
| - if (script_cache_ == NULL) script_cache_ = new ScriptCache(isolate_);
|
| -
|
| - // Perform GC to get unreferenced scripts evicted from the cache before
|
| - // returning the content.
|
| - isolate_->heap()->CollectAllGarbage(Heap::kNoGCFlags,
|
| - "Debug::GetLoadedScripts");
|
| -
|
| - // Get the scripts from the cache.
|
| - return script_cache_->GetScripts();
|
| -}
|
| -
|
| -
|
| -void Debug::GetStepinPositions(JavaScriptFrame* frame, StackFrame::Id frame_id,
|
| - List<int>* results_out) {
|
| - FrameSummary summary = GetFirstFrameSummary(frame);
|
| -
|
| - Handle<JSFunction> fun = Handle<JSFunction>(summary.function());
|
| - Handle<SharedFunctionInfo> shared = Handle<SharedFunctionInfo>(fun->shared());
|
| -
|
| - if (!EnsureDebugInfo(shared, fun)) return;
|
| -
|
| - Handle<DebugInfo> debug_info(shared->GetDebugInfo());
|
| - // Refresh frame summary if the code has been recompiled for debugging.
|
| - if (shared->code() != *summary.code()) summary = GetFirstFrameSummary(frame);
|
| -
|
| - // Find range of break points starting from the break point where execution
|
| - // has stopped.
|
| - Address call_pc = summary.pc() - 1;
|
| - List<BreakLocation> locations;
|
| - BreakLocation::FromAddressSameStatement(debug_info, ALL_BREAK_LOCATIONS,
|
| - call_pc, &locations);
|
| -
|
| - for (BreakLocation location : locations) {
|
| - if (location.pc() <= summary.pc()) {
|
| - // The break point is near our pc. Could be a step-in possibility,
|
| - // that is currently taken by active debugger call.
|
| - if (break_frame_id() == StackFrame::NO_ID) {
|
| - continue; // We are not stepping.
|
| - } else {
|
| - JavaScriptFrameIterator frame_it(isolate_, break_frame_id());
|
| - // If our frame is a top frame and we are stepping, we can do step-in
|
| - // at this place.
|
| - if (frame_it.frame()->id() != frame_id) continue;
|
| - }
|
| - }
|
| - if (location.IsStepInLocation()) results_out->Add(location.position());
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::RecordEvalCaller(Handle<Script> script) {
|
| - script->set_compilation_type(Script::COMPILATION_TYPE_EVAL);
|
| - // For eval scripts add information on the function from which eval was
|
| - // called.
|
| - StackTraceFrameIterator it(script->GetIsolate());
|
| - if (!it.done()) {
|
| - script->set_eval_from_shared(it.frame()->function()->shared());
|
| - Code* code = it.frame()->LookupCode();
|
| - int offset = static_cast<int>(
|
| - it.frame()->pc() - code->instruction_start());
|
| - script->set_eval_from_instructions_offset(Smi::FromInt(offset));
|
| - }
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeJSObject(const char* constructor_name,
|
| - int argc,
|
| - Handle<Object> argv[]) {
|
| - AssertDebugContext();
|
| - // Create the execution state object.
|
| - Handle<GlobalObject> global(isolate_->global_object());
|
| - Handle<Object> constructor = Object::GetProperty(
|
| - isolate_, global, constructor_name).ToHandleChecked();
|
| - DCHECK(constructor->IsJSFunction());
|
| - if (!constructor->IsJSFunction()) return MaybeHandle<Object>();
|
| - // We do not handle interrupts here. In particular, termination interrupts.
|
| - PostponeInterruptsScope no_interrupts(isolate_);
|
| - return Execution::TryCall(Handle<JSFunction>::cast(constructor),
|
| - handle(debug_context()->global_proxy()),
|
| - argc,
|
| - argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeExecutionState() {
|
| - // Create the execution state object.
|
| - Handle<Object> argv[] = { isolate_->factory()->NewNumberFromInt(break_id()) };
|
| - return MakeJSObject("MakeExecutionState", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeBreakEvent(Handle<Object> break_points_hit) {
|
| - // Create the new break event object.
|
| - Handle<Object> argv[] = { isolate_->factory()->NewNumberFromInt(break_id()),
|
| - break_points_hit };
|
| - return MakeJSObject("MakeBreakEvent", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeExceptionEvent(Handle<Object> exception,
|
| - bool uncaught,
|
| - Handle<Object> promise) {
|
| - // Create the new exception event object.
|
| - Handle<Object> argv[] = { isolate_->factory()->NewNumberFromInt(break_id()),
|
| - exception,
|
| - isolate_->factory()->ToBoolean(uncaught),
|
| - promise };
|
| - return MakeJSObject("MakeExceptionEvent", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeCompileEvent(Handle<Script> script,
|
| - v8::DebugEvent type) {
|
| - // Create the compile event object.
|
| - Handle<Object> script_wrapper = Script::GetWrapper(script);
|
| - Handle<Object> argv[] = { script_wrapper,
|
| - isolate_->factory()->NewNumberFromInt(type) };
|
| - return MakeJSObject("MakeCompileEvent", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakePromiseEvent(Handle<JSObject> event_data) {
|
| - // Create the promise event object.
|
| - Handle<Object> argv[] = { event_data };
|
| - return MakeJSObject("MakePromiseEvent", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::MakeAsyncTaskEvent(Handle<JSObject> task_event) {
|
| - // Create the async task event object.
|
| - Handle<Object> argv[] = { task_event };
|
| - return MakeJSObject("MakeAsyncTaskEvent", arraysize(argv), argv);
|
| -}
|
| -
|
| -
|
| -void Debug::OnThrow(Handle<Object> exception) {
|
| - if (in_debug_scope() || ignore_events()) return;
|
| - // Temporarily clear any scheduled_exception to allow evaluating
|
| - // JavaScript from the debug event handler.
|
| - HandleScope scope(isolate_);
|
| - Handle<Object> scheduled_exception;
|
| - if (isolate_->has_scheduled_exception()) {
|
| - scheduled_exception = handle(isolate_->scheduled_exception(), isolate_);
|
| - isolate_->clear_scheduled_exception();
|
| - }
|
| - OnException(exception, isolate_->GetPromiseOnStackOnThrow());
|
| - if (!scheduled_exception.is_null()) {
|
| - isolate_->thread_local_top()->scheduled_exception_ = *scheduled_exception;
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::OnPromiseReject(Handle<JSObject> promise, Handle<Object> value) {
|
| - if (in_debug_scope() || ignore_events()) return;
|
| - HandleScope scope(isolate_);
|
| - // Check whether the promise has been marked as having triggered a message.
|
| - Handle<Symbol> key = isolate_->factory()->promise_debug_marker_symbol();
|
| - if (JSReceiver::GetDataProperty(promise, key)->IsUndefined()) {
|
| - OnException(value, promise);
|
| - }
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::PromiseHasUserDefinedRejectHandler(
|
| - Handle<JSObject> promise) {
|
| - Handle<JSFunction> fun = Handle<JSFunction>::cast(
|
| - JSReceiver::GetDataProperty(isolate_->js_builtins_object(),
|
| - isolate_->factory()->NewStringFromStaticChars(
|
| - "$promiseHasUserDefinedRejectHandler")));
|
| - return Execution::Call(isolate_, fun, promise, 0, NULL);
|
| -}
|
| -
|
| -
|
| -void Debug::OnException(Handle<Object> exception, Handle<Object> promise) {
|
| - // In our prediction, try-finally is not considered to catch.
|
| - Isolate::CatchType catch_type = isolate_->PredictExceptionCatcher();
|
| - bool uncaught = (catch_type == Isolate::NOT_CAUGHT);
|
| - if (promise->IsJSObject()) {
|
| - Handle<JSObject> jspromise = Handle<JSObject>::cast(promise);
|
| - // Mark the promise as already having triggered a message.
|
| - Handle<Symbol> key = isolate_->factory()->promise_debug_marker_symbol();
|
| - JSObject::SetProperty(jspromise, key, key, STRICT).Assert();
|
| - // Check whether the promise reject is considered an uncaught exception.
|
| - Handle<Object> has_reject_handler;
|
| - ASSIGN_RETURN_ON_EXCEPTION_VALUE(
|
| - isolate_, has_reject_handler,
|
| - PromiseHasUserDefinedRejectHandler(jspromise), /* void */);
|
| - uncaught = has_reject_handler->IsFalse();
|
| - }
|
| - // Bail out if exception breaks are not active
|
| - if (uncaught) {
|
| - // Uncaught exceptions are reported by either flags.
|
| - if (!(break_on_uncaught_exception_ || break_on_exception_)) return;
|
| - } else {
|
| - // Caught exceptions are reported is activated.
|
| - if (!break_on_exception_) return;
|
| - }
|
| -
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Clear all current stepping setup.
|
| - ClearStepping();
|
| -
|
| - // Create the event data object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeExceptionEvent(
|
| - exception, uncaught, promise).ToHandle(&event_data)) {
|
| - return;
|
| - }
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::Exception, Handle<JSObject>::cast(event_data), false);
|
| - // Return to continue execution from where the exception was thrown.
|
| -}
|
| -
|
| -
|
| -void Debug::OnCompileError(Handle<Script> script) {
|
| - if (ignore_events()) return;
|
| -
|
| - if (in_debug_scope()) {
|
| - ProcessCompileEventInDebugScope(v8::CompileError, script);
|
| - return;
|
| - }
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Create the compile state object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeCompileEvent(script, v8::CompileError).ToHandle(&event_data)) return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::CompileError, Handle<JSObject>::cast(event_data), true);
|
| -}
|
| -
|
| -
|
| -void Debug::OnDebugBreak(Handle<Object> break_points_hit,
|
| - bool auto_continue) {
|
| - // The caller provided for DebugScope.
|
| - AssertDebugContext();
|
| - // Bail out if there is no listener for this event
|
| - if (ignore_events()) return;
|
| -
|
| - HandleScope scope(isolate_);
|
| - // Create the event data object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeBreakEvent(break_points_hit).ToHandle(&event_data)) return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::Break,
|
| - Handle<JSObject>::cast(event_data),
|
| - auto_continue);
|
| -}
|
| -
|
| -
|
| -void Debug::OnBeforeCompile(Handle<Script> script) {
|
| - if (in_debug_scope() || ignore_events()) return;
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Create the event data object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeCompileEvent(script, v8::BeforeCompile).ToHandle(&event_data))
|
| - return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::BeforeCompile,
|
| - Handle<JSObject>::cast(event_data),
|
| - true);
|
| -}
|
| -
|
| -
|
| -// Handle debugger actions when a new script is compiled.
|
| -void Debug::OnAfterCompile(Handle<Script> script) {
|
| - // Add the newly compiled script to the script cache.
|
| - if (script_cache_ != NULL) script_cache_->Add(script);
|
| -
|
| - if (ignore_events()) return;
|
| -
|
| - if (in_debug_scope()) {
|
| - ProcessCompileEventInDebugScope(v8::AfterCompile, script);
|
| - return;
|
| - }
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // If debugging there might be script break points registered for this
|
| - // script. Make sure that these break points are set.
|
| -
|
| - // Get the function UpdateScriptBreakPoints (defined in debug-debugger.js).
|
| - Handle<String> update_script_break_points_string =
|
| - isolate_->factory()->InternalizeOneByteString(
|
| - STATIC_CHAR_VECTOR("UpdateScriptBreakPoints"));
|
| - Handle<GlobalObject> debug_global(debug_context()->global_object());
|
| - Handle<Object> update_script_break_points =
|
| - Object::GetProperty(
|
| - debug_global, update_script_break_points_string).ToHandleChecked();
|
| - if (!update_script_break_points->IsJSFunction()) {
|
| - return;
|
| - }
|
| - DCHECK(update_script_break_points->IsJSFunction());
|
| -
|
| - // Wrap the script object in a proper JS object before passing it
|
| - // to JavaScript.
|
| - Handle<Object> wrapper = Script::GetWrapper(script);
|
| -
|
| - // Call UpdateScriptBreakPoints expect no exceptions.
|
| - Handle<Object> argv[] = { wrapper };
|
| - if (Execution::TryCall(Handle<JSFunction>::cast(update_script_break_points),
|
| - isolate_->js_builtins_object(),
|
| - arraysize(argv),
|
| - argv).is_null()) {
|
| - return;
|
| - }
|
| -
|
| - // Create the compile state object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeCompileEvent(script, v8::AfterCompile).ToHandle(&event_data)) return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::AfterCompile, Handle<JSObject>::cast(event_data), true);
|
| -}
|
| -
|
| -
|
| -void Debug::OnPromiseEvent(Handle<JSObject> data) {
|
| - if (in_debug_scope() || ignore_events()) return;
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Create the script collected state object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakePromiseEvent(data).ToHandle(&event_data)) return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::PromiseEvent,
|
| - Handle<JSObject>::cast(event_data),
|
| - true);
|
| -}
|
| -
|
| -
|
| -void Debug::OnAsyncTaskEvent(Handle<JSObject> data) {
|
| - if (in_debug_scope() || ignore_events()) return;
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Create the script collected state object.
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeAsyncTaskEvent(data).ToHandle(&event_data)) return;
|
| -
|
| - // Process debug event.
|
| - ProcessDebugEvent(v8::AsyncTaskEvent,
|
| - Handle<JSObject>::cast(event_data),
|
| - true);
|
| -}
|
| -
|
| -
|
| -void Debug::ProcessDebugEvent(v8::DebugEvent event,
|
| - Handle<JSObject> event_data,
|
| - bool auto_continue) {
|
| - HandleScope scope(isolate_);
|
| -
|
| - // Create the execution state.
|
| - Handle<Object> exec_state;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeExecutionState().ToHandle(&exec_state)) return;
|
| -
|
| - // First notify the message handler if any.
|
| - if (message_handler_ != NULL) {
|
| - NotifyMessageHandler(event,
|
| - Handle<JSObject>::cast(exec_state),
|
| - event_data,
|
| - auto_continue);
|
| - }
|
| - // Notify registered debug event listener. This can be either a C or
|
| - // a JavaScript function. Don't call event listener for v8::Break
|
| - // here, if it's only a debug command -- they will be processed later.
|
| - if ((event != v8::Break || !auto_continue) && !event_listener_.is_null()) {
|
| - CallEventCallback(event, exec_state, event_data, NULL);
|
| - }
|
| -}
|
| -
|
| -
|
| -void Debug::CallEventCallback(v8::DebugEvent event,
|
| - Handle<Object> exec_state,
|
| - Handle<Object> event_data,
|
| - v8::Debug::ClientData* client_data) {
|
| - bool previous = in_debug_event_listener_;
|
| - in_debug_event_listener_ = true;
|
| - if (event_listener_->IsForeign()) {
|
| - // Invoke the C debug event listener.
|
| - v8::Debug::EventCallback callback =
|
| - FUNCTION_CAST<v8::Debug::EventCallback>(
|
| - Handle<Foreign>::cast(event_listener_)->foreign_address());
|
| - EventDetailsImpl event_details(event,
|
| - Handle<JSObject>::cast(exec_state),
|
| - Handle<JSObject>::cast(event_data),
|
| - event_listener_data_,
|
| - client_data);
|
| - callback(event_details);
|
| - DCHECK(!isolate_->has_scheduled_exception());
|
| - } else {
|
| - // Invoke the JavaScript debug event listener.
|
| - DCHECK(event_listener_->IsJSFunction());
|
| - Handle<Object> argv[] = { Handle<Object>(Smi::FromInt(event), isolate_),
|
| - exec_state,
|
| - event_data,
|
| - event_listener_data_ };
|
| - Handle<JSReceiver> global(isolate_->global_proxy());
|
| - Execution::TryCall(Handle<JSFunction>::cast(event_listener_),
|
| - global, arraysize(argv), argv);
|
| - }
|
| - in_debug_event_listener_ = previous;
|
| -}
|
| -
|
| -
|
| -void Debug::ProcessCompileEventInDebugScope(v8::DebugEvent event,
|
| - Handle<Script> script) {
|
| - if (event_listener_.is_null()) return;
|
| -
|
| - SuppressDebug while_processing(this);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - Handle<Object> event_data;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeCompileEvent(script, event).ToHandle(&event_data)) return;
|
| -
|
| - // Create the execution state.
|
| - Handle<Object> exec_state;
|
| - // Bail out and don't call debugger if exception.
|
| - if (!MakeExecutionState().ToHandle(&exec_state)) return;
|
| -
|
| - CallEventCallback(event, exec_state, event_data, NULL);
|
| -}
|
| -
|
| -
|
| -Handle<Context> Debug::GetDebugContext() {
|
| - if (!is_loaded()) return Handle<Context>();
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return Handle<Context>();
|
| - // The global handle may be destroyed soon after. Return it reboxed.
|
| - return handle(*debug_context(), isolate_);
|
| -}
|
| -
|
| -
|
| -void Debug::NotifyMessageHandler(v8::DebugEvent event,
|
| - Handle<JSObject> exec_state,
|
| - Handle<JSObject> event_data,
|
| - bool auto_continue) {
|
| - // Prevent other interrupts from triggering, for example API callbacks,
|
| - // while dispatching message handler callbacks.
|
| - PostponeInterruptsScope no_interrupts(isolate_);
|
| - DCHECK(is_active_);
|
| - HandleScope scope(isolate_);
|
| - // Process the individual events.
|
| - bool sendEventMessage = false;
|
| - switch (event) {
|
| - case v8::Break:
|
| - sendEventMessage = !auto_continue;
|
| - break;
|
| - case v8::NewFunction:
|
| - case v8::BeforeCompile:
|
| - case v8::CompileError:
|
| - case v8::PromiseEvent:
|
| - case v8::AsyncTaskEvent:
|
| - break;
|
| - case v8::Exception:
|
| - case v8::AfterCompile:
|
| - sendEventMessage = true;
|
| - break;
|
| - }
|
| -
|
| - // The debug command interrupt flag might have been set when the command was
|
| - // added. It should be enough to clear the flag only once while we are in the
|
| - // debugger.
|
| - DCHECK(in_debug_scope());
|
| - isolate_->stack_guard()->ClearDebugCommand();
|
| -
|
| - // Notify the debugger that a debug event has occurred unless auto continue is
|
| - // active in which case no event is send.
|
| - if (sendEventMessage) {
|
| - MessageImpl message = MessageImpl::NewEvent(
|
| - event,
|
| - auto_continue,
|
| - Handle<JSObject>::cast(exec_state),
|
| - Handle<JSObject>::cast(event_data));
|
| - InvokeMessageHandler(message);
|
| - }
|
| -
|
| - // If auto continue don't make the event cause a break, but process messages
|
| - // in the queue if any. For script collected events don't even process
|
| - // messages in the queue as the execution state might not be what is expected
|
| - // by the client.
|
| - if (auto_continue && !has_commands()) return;
|
| -
|
| - // DebugCommandProcessor goes here.
|
| - bool running = auto_continue;
|
| -
|
| - Handle<Object> cmd_processor_ctor = Object::GetProperty(
|
| - isolate_, exec_state, "debugCommandProcessor").ToHandleChecked();
|
| - Handle<Object> ctor_args[] = { isolate_->factory()->ToBoolean(running) };
|
| - Handle<Object> cmd_processor = Execution::Call(
|
| - isolate_, cmd_processor_ctor, exec_state, 1, ctor_args).ToHandleChecked();
|
| - Handle<JSFunction> process_debug_request = Handle<JSFunction>::cast(
|
| - Object::GetProperty(
|
| - isolate_, cmd_processor, "processDebugRequest").ToHandleChecked());
|
| - Handle<Object> is_running = Object::GetProperty(
|
| - isolate_, cmd_processor, "isRunning").ToHandleChecked();
|
| -
|
| - // Process requests from the debugger.
|
| - do {
|
| - // Wait for new command in the queue.
|
| - command_received_.Wait();
|
| -
|
| - // Get the command from the queue.
|
| - CommandMessage command = command_queue_.Get();
|
| - isolate_->logger()->DebugTag(
|
| - "Got request from command queue, in interactive loop.");
|
| - if (!is_active()) {
|
| - // Delete command text and user data.
|
| - command.Dispose();
|
| - return;
|
| - }
|
| -
|
| - Vector<const uc16> command_text(
|
| - const_cast<const uc16*>(command.text().start()),
|
| - command.text().length());
|
| - Handle<String> request_text = isolate_->factory()->NewStringFromTwoByte(
|
| - command_text).ToHandleChecked();
|
| - Handle<Object> request_args[] = { request_text };
|
| - Handle<Object> answer_value;
|
| - Handle<String> answer;
|
| - MaybeHandle<Object> maybe_exception;
|
| - MaybeHandle<Object> maybe_result =
|
| - Execution::TryCall(process_debug_request, cmd_processor, 1,
|
| - request_args, &maybe_exception);
|
| -
|
| - if (maybe_result.ToHandle(&answer_value)) {
|
| - if (answer_value->IsUndefined()) {
|
| - answer = isolate_->factory()->empty_string();
|
| - } else {
|
| - answer = Handle<String>::cast(answer_value);
|
| - }
|
| -
|
| - // Log the JSON request/response.
|
| - if (FLAG_trace_debug_json) {
|
| - PrintF("%s\n", request_text->ToCString().get());
|
| - PrintF("%s\n", answer->ToCString().get());
|
| - }
|
| -
|
| - Handle<Object> is_running_args[] = { answer };
|
| - maybe_result = Execution::Call(
|
| - isolate_, is_running, cmd_processor, 1, is_running_args);
|
| - Handle<Object> result;
|
| - if (!maybe_result.ToHandle(&result)) break;
|
| - running = result->IsTrue();
|
| - } else {
|
| - Handle<Object> exception;
|
| - if (!maybe_exception.ToHandle(&exception)) break;
|
| - Handle<Object> result;
|
| - if (!Execution::ToString(isolate_, exception).ToHandle(&result)) break;
|
| - answer = Handle<String>::cast(result);
|
| - }
|
| -
|
| - // Return the result.
|
| - MessageImpl message = MessageImpl::NewResponse(
|
| - event, running, exec_state, event_data, answer, command.client_data());
|
| - InvokeMessageHandler(message);
|
| - command.Dispose();
|
| -
|
| - // Return from debug event processing if either the VM is put into the
|
| - // running state (through a continue command) or auto continue is active
|
| - // and there are no more commands queued.
|
| - } while (!running || has_commands());
|
| - command_queue_.Clear();
|
| -}
|
| -
|
| -
|
| -void Debug::SetEventListener(Handle<Object> callback,
|
| - Handle<Object> data) {
|
| - GlobalHandles* global_handles = isolate_->global_handles();
|
| -
|
| - // Remove existing entry.
|
| - GlobalHandles::Destroy(event_listener_.location());
|
| - event_listener_ = Handle<Object>();
|
| - GlobalHandles::Destroy(event_listener_data_.location());
|
| - event_listener_data_ = Handle<Object>();
|
| -
|
| - // Set new entry.
|
| - if (!callback->IsUndefined() && !callback->IsNull()) {
|
| - event_listener_ = global_handles->Create(*callback);
|
| - if (data.is_null()) data = isolate_->factory()->undefined_value();
|
| - event_listener_data_ = global_handles->Create(*data);
|
| - }
|
| -
|
| - UpdateState();
|
| -}
|
| -
|
| -
|
| -void Debug::SetMessageHandler(v8::Debug::MessageHandler handler) {
|
| - message_handler_ = handler;
|
| - UpdateState();
|
| - if (handler == NULL && in_debug_scope()) {
|
| - // Send an empty command to the debugger if in a break to make JavaScript
|
| - // run again if the debugger is closed.
|
| - EnqueueCommandMessage(Vector<const uint16_t>::empty());
|
| - }
|
| -}
|
| -
|
| -
|
| -
|
| -void Debug::UpdateState() {
|
| - bool is_active = message_handler_ != NULL || !event_listener_.is_null();
|
| - if (is_active || in_debug_scope()) {
|
| - // Note that the debug context could have already been loaded to
|
| - // bootstrap test cases.
|
| - isolate_->compilation_cache()->Disable();
|
| - is_active = Load();
|
| - } else if (is_loaded()) {
|
| - isolate_->compilation_cache()->Enable();
|
| - Unload();
|
| - }
|
| - is_active_ = is_active;
|
| -}
|
| -
|
| -
|
| -// Calls the registered debug message handler. This callback is part of the
|
| -// public API.
|
| -void Debug::InvokeMessageHandler(MessageImpl message) {
|
| - if (message_handler_ != NULL) message_handler_(message);
|
| -}
|
| -
|
| -
|
| -// Puts a command coming from the public API on the queue. Creates
|
| -// a copy of the command string managed by the debugger. Up to this
|
| -// point, the command data was managed by the API client. Called
|
| -// by the API client thread.
|
| -void Debug::EnqueueCommandMessage(Vector<const uint16_t> command,
|
| - v8::Debug::ClientData* client_data) {
|
| - // Need to cast away const.
|
| - CommandMessage message = CommandMessage::New(
|
| - Vector<uint16_t>(const_cast<uint16_t*>(command.start()),
|
| - command.length()),
|
| - client_data);
|
| - isolate_->logger()->DebugTag("Put command on command_queue.");
|
| - command_queue_.Put(message);
|
| - command_received_.Signal();
|
| -
|
| - // Set the debug command break flag to have the command processed.
|
| - if (!in_debug_scope()) isolate_->stack_guard()->RequestDebugCommand();
|
| -}
|
| -
|
| -
|
| -MaybeHandle<Object> Debug::Call(Handle<JSFunction> fun, Handle<Object> data) {
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return isolate_->factory()->undefined_value();
|
| -
|
| - // Create the execution state.
|
| - Handle<Object> exec_state;
|
| - if (!MakeExecutionState().ToHandle(&exec_state)) {
|
| - return isolate_->factory()->undefined_value();
|
| - }
|
| -
|
| - Handle<Object> argv[] = { exec_state, data };
|
| - return Execution::Call(
|
| - isolate_,
|
| - fun,
|
| - Handle<Object>(debug_context()->global_proxy(), isolate_),
|
| - arraysize(argv),
|
| - argv);
|
| -}
|
| -
|
| -
|
| -void Debug::HandleDebugBreak() {
|
| - // Ignore debug break during bootstrapping.
|
| - if (isolate_->bootstrapper()->IsActive()) return;
|
| - // Just continue if breaks are disabled.
|
| - if (break_disabled()) return;
|
| - // Ignore debug break if debugger is not active.
|
| - if (!is_active()) return;
|
| -
|
| - StackLimitCheck check(isolate_);
|
| - if (check.HasOverflowed()) return;
|
| -
|
| - { JavaScriptFrameIterator it(isolate_);
|
| - DCHECK(!it.done());
|
| - Object* fun = it.frame()->function();
|
| - if (fun && fun->IsJSFunction()) {
|
| - // Don't stop in builtin functions.
|
| - if (JSFunction::cast(fun)->IsBuiltin()) return;
|
| - GlobalObject* global = JSFunction::cast(fun)->context()->global_object();
|
| - // Don't stop in debugger functions.
|
| - if (IsDebugGlobal(global)) return;
|
| - }
|
| - }
|
| -
|
| - // Collect the break state before clearing the flags.
|
| - bool debug_command_only = isolate_->stack_guard()->CheckDebugCommand() &&
|
| - !isolate_->stack_guard()->CheckDebugBreak();
|
| -
|
| - isolate_->stack_guard()->ClearDebugBreak();
|
| -
|
| - ProcessDebugMessages(debug_command_only);
|
| -}
|
| -
|
| -
|
| -void Debug::ProcessDebugMessages(bool debug_command_only) {
|
| - isolate_->stack_guard()->ClearDebugCommand();
|
| -
|
| - StackLimitCheck check(isolate_);
|
| - if (check.HasOverflowed()) return;
|
| -
|
| - HandleScope scope(isolate_);
|
| - DebugScope debug_scope(this);
|
| - if (debug_scope.failed()) return;
|
| -
|
| - // Notify the debug event listeners. Indicate auto continue if the break was
|
| - // a debug command break.
|
| - OnDebugBreak(isolate_->factory()->undefined_value(), debug_command_only);
|
| -}
|
| -
|
| -
|
| -DebugScope::DebugScope(Debug* debug)
|
| - : debug_(debug),
|
| - prev_(debug->debugger_entry()),
|
| - save_(debug_->isolate_),
|
| - no_termination_exceptons_(debug_->isolate_,
|
| - StackGuard::TERMINATE_EXECUTION) {
|
| - // Link recursive debugger entry.
|
| - base::NoBarrier_Store(&debug_->thread_local_.current_debug_scope_,
|
| - reinterpret_cast<base::AtomicWord>(this));
|
| -
|
| - // Store the previous break id and frame id.
|
| - break_id_ = debug_->break_id();
|
| - break_frame_id_ = debug_->break_frame_id();
|
| -
|
| - // Create the new break info. If there is no JavaScript frames there is no
|
| - // break frame id.
|
| - JavaScriptFrameIterator it(isolate());
|
| - bool has_js_frames = !it.done();
|
| - debug_->thread_local_.break_frame_id_ = has_js_frames ? it.frame()->id()
|
| - : StackFrame::NO_ID;
|
| - debug_->SetNextBreakId();
|
| -
|
| - debug_->UpdateState();
|
| - // Make sure that debugger is loaded and enter the debugger context.
|
| - // The previous context is kept in save_.
|
| - failed_ = !debug_->is_loaded();
|
| - if (!failed_) isolate()->set_context(*debug->debug_context());
|
| -}
|
| -
|
| -
|
| -
|
| -DebugScope::~DebugScope() {
|
| - if (!failed_ && prev_ == NULL) {
|
| - // Clear mirror cache when leaving the debugger. Skip this if there is a
|
| - // pending exception as clearing the mirror cache calls back into
|
| - // JavaScript. This can happen if the v8::Debug::Call is used in which
|
| - // case the exception should end up in the calling code.
|
| - if (!isolate()->has_pending_exception()) debug_->ClearMirrorCache();
|
| -
|
| - // If there are commands in the queue when leaving the debugger request
|
| - // that these commands are processed.
|
| - if (debug_->has_commands()) isolate()->stack_guard()->RequestDebugCommand();
|
| - }
|
| -
|
| - // Leaving this debugger entry.
|
| - base::NoBarrier_Store(&debug_->thread_local_.current_debug_scope_,
|
| - reinterpret_cast<base::AtomicWord>(prev_));
|
| -
|
| - // Restore to the previous break state.
|
| - debug_->thread_local_.break_frame_id_ = break_frame_id_;
|
| - debug_->thread_local_.break_id_ = break_id_;
|
| -
|
| - debug_->UpdateState();
|
| -}
|
| -
|
| -
|
| -MessageImpl MessageImpl::NewEvent(DebugEvent event,
|
| - bool running,
|
| - Handle<JSObject> exec_state,
|
| - Handle<JSObject> event_data) {
|
| - MessageImpl message(true, event, running,
|
| - exec_state, event_data, Handle<String>(), NULL);
|
| - return message;
|
| -}
|
| -
|
| -
|
| -MessageImpl MessageImpl::NewResponse(DebugEvent event,
|
| - bool running,
|
| - Handle<JSObject> exec_state,
|
| - Handle<JSObject> event_data,
|
| - Handle<String> response_json,
|
| - v8::Debug::ClientData* client_data) {
|
| - MessageImpl message(false, event, running,
|
| - exec_state, event_data, response_json, client_data);
|
| - return message;
|
| -}
|
| -
|
| -
|
| -MessageImpl::MessageImpl(bool is_event,
|
| - DebugEvent event,
|
| - bool running,
|
| - Handle<JSObject> exec_state,
|
| - Handle<JSObject> event_data,
|
| - Handle<String> response_json,
|
| - v8::Debug::ClientData* client_data)
|
| - : is_event_(is_event),
|
| - event_(event),
|
| - running_(running),
|
| - exec_state_(exec_state),
|
| - event_data_(event_data),
|
| - response_json_(response_json),
|
| - client_data_(client_data) {}
|
| -
|
| -
|
| -bool MessageImpl::IsEvent() const {
|
| - return is_event_;
|
| -}
|
| -
|
| -
|
| -bool MessageImpl::IsResponse() const {
|
| - return !is_event_;
|
| -}
|
| -
|
| -
|
| -DebugEvent MessageImpl::GetEvent() const {
|
| - return event_;
|
| -}
|
| -
|
| -
|
| -bool MessageImpl::WillStartRunning() const {
|
| - return running_;
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Object> MessageImpl::GetExecutionState() const {
|
| - return v8::Utils::ToLocal(exec_state_);
|
| -}
|
| -
|
| -
|
| -v8::Isolate* MessageImpl::GetIsolate() const {
|
| - return reinterpret_cast<v8::Isolate*>(exec_state_->GetIsolate());
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Object> MessageImpl::GetEventData() const {
|
| - return v8::Utils::ToLocal(event_data_);
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::String> MessageImpl::GetJSON() const {
|
| - Isolate* isolate = event_data_->GetIsolate();
|
| - v8::EscapableHandleScope scope(reinterpret_cast<v8::Isolate*>(isolate));
|
| -
|
| - if (IsEvent()) {
|
| - // Call toJSONProtocol on the debug event object.
|
| - Handle<Object> fun = Object::GetProperty(
|
| - isolate, event_data_, "toJSONProtocol").ToHandleChecked();
|
| - if (!fun->IsJSFunction()) {
|
| - return v8::Local<v8::String>();
|
| - }
|
| -
|
| - MaybeHandle<Object> maybe_json =
|
| - Execution::TryCall(Handle<JSFunction>::cast(fun), event_data_, 0, NULL);
|
| - Handle<Object> json;
|
| - if (!maybe_json.ToHandle(&json) || !json->IsString()) {
|
| - return v8::Local<v8::String>();
|
| - }
|
| - return scope.Escape(v8::Utils::ToLocal(Handle<String>::cast(json)));
|
| - } else {
|
| - return v8::Utils::ToLocal(response_json_);
|
| - }
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Context> MessageImpl::GetEventContext() const {
|
| - Isolate* isolate = event_data_->GetIsolate();
|
| - v8::Local<v8::Context> context = GetDebugEventContext(isolate);
|
| - // Isolate::context() may be NULL when "script collected" event occurs.
|
| - DCHECK(!context.IsEmpty());
|
| - return context;
|
| -}
|
| -
|
| -
|
| -v8::Debug::ClientData* MessageImpl::GetClientData() const {
|
| - return client_data_;
|
| -}
|
| -
|
| -
|
| -EventDetailsImpl::EventDetailsImpl(DebugEvent event,
|
| - Handle<JSObject> exec_state,
|
| - Handle<JSObject> event_data,
|
| - Handle<Object> callback_data,
|
| - v8::Debug::ClientData* client_data)
|
| - : event_(event),
|
| - exec_state_(exec_state),
|
| - event_data_(event_data),
|
| - callback_data_(callback_data),
|
| - client_data_(client_data) {}
|
| -
|
| -
|
| -DebugEvent EventDetailsImpl::GetEvent() const {
|
| - return event_;
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Object> EventDetailsImpl::GetExecutionState() const {
|
| - return v8::Utils::ToLocal(exec_state_);
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Object> EventDetailsImpl::GetEventData() const {
|
| - return v8::Utils::ToLocal(event_data_);
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Context> EventDetailsImpl::GetEventContext() const {
|
| - return GetDebugEventContext(exec_state_->GetIsolate());
|
| -}
|
| -
|
| -
|
| -v8::Local<v8::Value> EventDetailsImpl::GetCallbackData() const {
|
| - return v8::Utils::ToLocal(callback_data_);
|
| -}
|
| -
|
| -
|
| -v8::Debug::ClientData* EventDetailsImpl::GetClientData() const {
|
| - return client_data_;
|
| -}
|
| -
|
| -
|
| -CommandMessage::CommandMessage() : text_(Vector<uint16_t>::empty()),
|
| - client_data_(NULL) {
|
| -}
|
| -
|
| -
|
| -CommandMessage::CommandMessage(const Vector<uint16_t>& text,
|
| - v8::Debug::ClientData* data)
|
| - : text_(text),
|
| - client_data_(data) {
|
| -}
|
| -
|
| -
|
| -void CommandMessage::Dispose() {
|
| - text_.Dispose();
|
| - delete client_data_;
|
| - client_data_ = NULL;
|
| -}
|
| -
|
| -
|
| -CommandMessage CommandMessage::New(const Vector<uint16_t>& command,
|
| - v8::Debug::ClientData* data) {
|
| - return CommandMessage(command.Clone(), data);
|
| -}
|
| -
|
| -
|
| -CommandMessageQueue::CommandMessageQueue(int size) : start_(0), end_(0),
|
| - size_(size) {
|
| - messages_ = NewArray<CommandMessage>(size);
|
| -}
|
| -
|
| -
|
| -CommandMessageQueue::~CommandMessageQueue() {
|
| - while (!IsEmpty()) Get().Dispose();
|
| - DeleteArray(messages_);
|
| -}
|
| -
|
| -
|
| -CommandMessage CommandMessageQueue::Get() {
|
| - DCHECK(!IsEmpty());
|
| - int result = start_;
|
| - start_ = (start_ + 1) % size_;
|
| - return messages_[result];
|
| -}
|
| -
|
| -
|
| -void CommandMessageQueue::Put(const CommandMessage& message) {
|
| - if ((end_ + 1) % size_ == start_) {
|
| - Expand();
|
| - }
|
| - messages_[end_] = message;
|
| - end_ = (end_ + 1) % size_;
|
| -}
|
| -
|
| -
|
| -void CommandMessageQueue::Expand() {
|
| - CommandMessageQueue new_queue(size_ * 2);
|
| - while (!IsEmpty()) {
|
| - new_queue.Put(Get());
|
| - }
|
| - CommandMessage* array_to_free = messages_;
|
| - *this = new_queue;
|
| - new_queue.messages_ = array_to_free;
|
| - // Make the new_queue empty so that it doesn't call Dispose on any messages.
|
| - new_queue.start_ = new_queue.end_;
|
| - // Automatic destructor called on new_queue, freeing array_to_free.
|
| -}
|
| -
|
| -
|
| -LockingCommandMessageQueue::LockingCommandMessageQueue(Logger* logger, int size)
|
| - : logger_(logger), queue_(size) {}
|
| -
|
| -
|
| -bool LockingCommandMessageQueue::IsEmpty() const {
|
| - base::LockGuard<base::Mutex> lock_guard(&mutex_);
|
| - return queue_.IsEmpty();
|
| -}
|
| -
|
| -
|
| -CommandMessage LockingCommandMessageQueue::Get() {
|
| - base::LockGuard<base::Mutex> lock_guard(&mutex_);
|
| - CommandMessage result = queue_.Get();
|
| - logger_->DebugEvent("Get", result.text());
|
| - return result;
|
| -}
|
| -
|
| -
|
| -void LockingCommandMessageQueue::Put(const CommandMessage& message) {
|
| - base::LockGuard<base::Mutex> lock_guard(&mutex_);
|
| - queue_.Put(message);
|
| - logger_->DebugEvent("Put", message.text());
|
| -}
|
| -
|
| -
|
| -void LockingCommandMessageQueue::Clear() {
|
| - base::LockGuard<base::Mutex> lock_guard(&mutex_);
|
| - queue_.Clear();
|
| -}
|
| -
|
| -} // namespace internal
|
| -} // namespace v8
|
|
|
Chromium Code Reviews
Issue 1265923002:
Debugger: move implementation to a separate folder. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master