| // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/exceptions.h" |
| |
| #include "platform/address_sanitizer.h" |
| |
| #include "vm/dart_api_impl.h" |
| #include "vm/dart_entry.h" |
| #include "vm/debugger.h" |
| #include "vm/flags.h" |
| #include "vm/object.h" |
| #include "vm/object_store.h" |
| #include "vm/stack_frame.h" |
| #include "vm/stub_code.h" |
| #include "vm/symbols.h" |
| #include "vm/tags.h" |
| |
| namespace dart { |
| |
| DEFINE_FLAG(bool, print_stacktrace_at_throw, false, |
| "Prints a stack trace everytime a throw occurs."); |
| |
| |
| const char* Exceptions::kCastErrorDstName = "type cast"; |
| |
| |
| class StacktraceBuilder : public ValueObject { |
| public: |
| StacktraceBuilder() { } |
| virtual ~StacktraceBuilder() { } |
| |
| virtual void AddFrame(const Code& code, |
| const Smi& offset, |
| bool is_catch_frame) = 0; |
| |
| virtual bool FullStacktrace() const = 0; |
| }; |
| |
| |
| class RegularStacktraceBuilder : public StacktraceBuilder { |
| public: |
| explicit RegularStacktraceBuilder(bool full_stacktrace) |
| : code_list_(GrowableObjectArray::Handle(GrowableObjectArray::New())), |
| pc_offset_list_( |
| GrowableObjectArray::Handle(GrowableObjectArray::New())), |
| catch_code_list_( |
| full_stacktrace ? |
| GrowableObjectArray::Handle(GrowableObjectArray::New()) : |
| GrowableObjectArray::Handle()), |
| catch_pc_offset_list_( |
| full_stacktrace ? |
| GrowableObjectArray::Handle(GrowableObjectArray::New()) : |
| GrowableObjectArray::Handle()), |
| full_stacktrace_(full_stacktrace) { } |
| ~RegularStacktraceBuilder() { } |
| |
| const GrowableObjectArray& code_list() const { return code_list_; } |
| const GrowableObjectArray& pc_offset_list() const { return pc_offset_list_; } |
| const GrowableObjectArray& catch_code_list() const { |
| return catch_code_list_; |
| } |
| const GrowableObjectArray& catch_pc_offset_list() const { |
| return catch_pc_offset_list_; |
| } |
| virtual bool FullStacktrace() const { return full_stacktrace_; } |
| |
| virtual void AddFrame(const Code& code, |
| const Smi& offset, |
| bool is_catch_frame) { |
| if (is_catch_frame) { |
| catch_code_list_.Add(code); |
| catch_pc_offset_list_.Add(offset); |
| } else { |
| code_list_.Add(code); |
| pc_offset_list_.Add(offset); |
| } |
| } |
| |
| private: |
| const GrowableObjectArray& code_list_; |
| const GrowableObjectArray& pc_offset_list_; |
| const GrowableObjectArray& catch_code_list_; |
| const GrowableObjectArray& catch_pc_offset_list_; |
| bool full_stacktrace_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RegularStacktraceBuilder); |
| }; |
| |
| |
| class PreallocatedStacktraceBuilder : public StacktraceBuilder { |
| public: |
| explicit PreallocatedStacktraceBuilder(const Stacktrace& stacktrace) |
| : stacktrace_(stacktrace), |
| cur_index_(0) { |
| ASSERT(stacktrace_.raw() == |
| Isolate::Current()->object_store()->preallocated_stack_trace()); |
| } |
| ~PreallocatedStacktraceBuilder() { } |
| |
| virtual void AddFrame(const Code& code, |
| const Smi& offset, |
| bool is_catch_frame); |
| |
| virtual bool FullStacktrace() const { return false; } |
| |
| private: |
| static const int kNumTopframes = 3; |
| |
| const Stacktrace& stacktrace_; |
| intptr_t cur_index_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PreallocatedStacktraceBuilder); |
| }; |
| |
| |
| void PreallocatedStacktraceBuilder::AddFrame(const Code& code, |
| const Smi& offset, |
| bool is_catch_frame) { |
| if (cur_index_ >= Stacktrace::kPreallocatedStackdepth) { |
| // The number of frames is overflowing the preallocated stack trace object. |
| Code& frame_code = Code::Handle(); |
| Smi& frame_offset = Smi::Handle(); |
| intptr_t start = Stacktrace::kPreallocatedStackdepth - (kNumTopframes - 1); |
| intptr_t null_slot = start - 2; |
| // Add an empty slot to indicate the overflow so that the toString |
| // method can account for the overflow. |
| if (stacktrace_.FunctionAtFrame(null_slot) != Function::null()) { |
| stacktrace_.SetCodeAtFrame(null_slot, frame_code); |
| } |
| // Move frames one slot down so that we can accomodate the new frame. |
| for (intptr_t i = start; i < Stacktrace::kPreallocatedStackdepth; i++) { |
| intptr_t prev = (i - 1); |
| frame_code = stacktrace_.CodeAtFrame(i); |
| frame_offset = stacktrace_.PcOffsetAtFrame(i); |
| stacktrace_.SetCodeAtFrame(prev, frame_code); |
| stacktrace_.SetPcOffsetAtFrame(prev, frame_offset); |
| } |
| cur_index_ = (Stacktrace::kPreallocatedStackdepth - 1); |
| } |
| stacktrace_.SetCodeAtFrame(cur_index_, code); |
| stacktrace_.SetPcOffsetAtFrame(cur_index_, offset); |
| cur_index_ += 1; |
| } |
| |
| |
| static void BuildStackTrace(Isolate* isolate, StacktraceBuilder* builder) { |
| StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); |
| StackFrame* frame = frames.NextFrame(); |
| ASSERT(frame != NULL); // We expect to find a dart invocation frame. |
| Code& code = Code::Handle(); |
| Smi& offset = Smi::Handle(); |
| bool dart_handler_found = false; |
| bool handler_pc_set = false; |
| while (frame != NULL) { |
| while (!frame->IsEntryFrame()) { |
| if (frame->IsDartFrame()) { |
| code = frame->LookupDartCode(); |
| offset = Smi::New(frame->pc() - code.EntryPoint()); |
| builder->AddFrame(code, offset, dart_handler_found); |
| bool needs_stacktrace = false; |
| bool is_catch_all = false; |
| uword handler_pc = kUwordMax; |
| if (!handler_pc_set && |
| frame->FindExceptionHandler(isolate, |
| &handler_pc, |
| &needs_stacktrace, |
| &is_catch_all)) { |
| handler_pc_set = true; |
| dart_handler_found = true; |
| if (!builder->FullStacktrace()) { |
| return; |
| } |
| } |
| } |
| frame = frames.NextFrame(); |
| ASSERT(frame != NULL); |
| } |
| ASSERT(frame->IsEntryFrame()); |
| if (!handler_pc_set) { |
| handler_pc_set = true; |
| if (!builder->FullStacktrace()) { |
| return; |
| } |
| } |
| frame = frames.NextFrame(); |
| } |
| } |
| |
| |
| // Iterate through the stack frames and try to find a frame with an |
| // exception handler. Once found, set the pc, sp and fp so that execution |
| // can continue in that frame. Sets 'needs_stacktrace' if there is no |
| // cath-all handler or if a stack-trace is specified in the catch. |
| static bool FindExceptionHandler(Isolate* isolate, |
| uword* handler_pc, |
| uword* handler_sp, |
| uword* handler_fp, |
| bool* needs_stacktrace) { |
| StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); |
| StackFrame* frame = frames.NextFrame(); |
| ASSERT(frame != NULL); // We expect to find a dart invocation frame. |
| bool handler_pc_set = false; |
| *needs_stacktrace = false; |
| bool is_catch_all = false; |
| uword temp_handler_pc = kUwordMax; |
| while (!frame->IsEntryFrame()) { |
| if (frame->IsDartFrame()) { |
| if (frame->FindExceptionHandler(isolate, |
| &temp_handler_pc, |
| needs_stacktrace, |
| &is_catch_all)) { |
| if (!handler_pc_set) { |
| handler_pc_set = true; |
| *handler_pc = temp_handler_pc; |
| *handler_sp = frame->sp(); |
| *handler_fp = frame->fp(); |
| } |
| if (*needs_stacktrace || is_catch_all) { |
| return true; |
| } |
| } |
| } // if frame->IsDartFrame |
| frame = frames.NextFrame(); |
| ASSERT(frame != NULL); |
| } // while !frame->IsEntryFrame |
| ASSERT(frame->IsEntryFrame()); |
| if (!handler_pc_set) { |
| *handler_pc = frame->pc(); |
| *handler_sp = frame->sp(); |
| *handler_fp = frame->fp(); |
| } |
| // No catch-all encountered, needs stacktrace. |
| *needs_stacktrace = true; |
| return handler_pc_set; |
| } |
| |
| |
| static void FindErrorHandler(uword* handler_pc, |
| uword* handler_sp, |
| uword* handler_fp) { |
| // TODO(turnidge): Is there a faster way to get the next entry frame? |
| StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); |
| StackFrame* frame = frames.NextFrame(); |
| ASSERT(frame != NULL); |
| while (!frame->IsEntryFrame()) { |
| frame = frames.NextFrame(); |
| ASSERT(frame != NULL); |
| } |
| ASSERT(frame->IsEntryFrame()); |
| *handler_pc = frame->pc(); |
| *handler_sp = frame->sp(); |
| *handler_fp = frame->fp(); |
| } |
| |
| |
| static void JumpToExceptionHandler(Isolate* isolate, |
| uword program_counter, |
| uword stack_pointer, |
| uword frame_pointer, |
| const Object& exception_object, |
| const Object& stacktrace_object) { |
| // The no_gc StackResource is unwound through the tear down of |
| // stack resources below. |
| NoGCScope no_gc; |
| RawObject* raw_exception = exception_object.raw(); |
| RawObject* raw_stacktrace = stacktrace_object.raw(); |
| |
| #if defined(USING_SIMULATOR) |
| // Unwinding of the C++ frames and destroying of their stack resources is done |
| // by the simulator, because the target stack_pointer is a simulated stack |
| // pointer and not the C++ stack pointer. |
| |
| // Continue simulating at the given pc in the given frame after setting up the |
| // exception object in the kExceptionObjectReg register and the stacktrace |
| // object (may be raw null) in the kStackTraceObjectReg register. |
| |
| Simulator::Current()->Longjmp(program_counter, stack_pointer, frame_pointer, |
| raw_exception, raw_stacktrace, isolate); |
| #else |
| // Prepare for unwinding frames by destroying all the stack resources |
| // in the previous frames. |
| |
| while (isolate->top_resource() != NULL && |
| (reinterpret_cast<uword>(isolate->top_resource()) < stack_pointer)) { |
| isolate->top_resource()->~StackResource(); |
| } |
| |
| // Call a stub to set up the exception object in kExceptionObjectReg, |
| // to set up the stacktrace object in kStackTraceObjectReg, and to |
| // continue execution at the given pc in the given frame. |
| typedef void (*ExcpHandler)(uword, uword, uword, RawObject*, RawObject*, |
| Isolate*); |
| ExcpHandler func = reinterpret_cast<ExcpHandler>( |
| StubCode::JumpToExceptionHandlerEntryPoint()); |
| |
| // Unpoison the stack before we tear it down in the generated stub code. |
| uword current_sp = reinterpret_cast<uword>(&program_counter) - 1024; |
| ASAN_UNPOISON(reinterpret_cast<void*>(current_sp), |
| stack_pointer - current_sp); |
| |
| func(program_counter, stack_pointer, frame_pointer, |
| raw_exception, raw_stacktrace, isolate); |
| #endif |
| UNREACHABLE(); |
| } |
| |
| |
| static RawField* LookupStacktraceField(const Instance& instance) { |
| if (instance.GetClassId() < kNumPredefinedCids) { |
| // 'class Error' is not a predefined class. |
| return Field::null(); |
| } |
| Isolate* isolate = Isolate::Current(); |
| Class& error_class = Class::Handle(isolate, |
| isolate->object_store()->error_class()); |
| if (error_class.IsNull()) { |
| const Library& core_lib = Library::Handle(isolate, Library::CoreLibrary()); |
| error_class = core_lib.LookupClass(Symbols::Error()); |
| ASSERT(!error_class.IsNull()); |
| isolate->object_store()->set_error_class(error_class); |
| } |
| // If instance class extends 'class Error' return '_stackTrace' field. |
| Class& test_class = Class::Handle(isolate, instance.clazz()); |
| AbstractType& type = AbstractType::Handle(isolate, AbstractType::null()); |
| while (true) { |
| if (test_class.raw() == error_class.raw()) { |
| return error_class.LookupInstanceField(Symbols::_stackTrace()); |
| } |
| type = test_class.super_type(); |
| if (type.IsNull()) return Field::null(); |
| test_class = type.type_class(); |
| } |
| UNREACHABLE(); |
| return Field::null(); |
| } |
| |
| |
| RawStacktrace* Exceptions::CurrentStacktrace() { |
| Isolate* isolate = Isolate::Current(); |
| RegularStacktraceBuilder frame_builder(true); |
| BuildStackTrace(isolate, &frame_builder); |
| |
| // Create arrays for code and pc_offset tuples of each frame. |
| const Array& full_code_array = Array::Handle(isolate, |
| Array::MakeArray(frame_builder.code_list())); |
| const Array& full_pc_offset_array = Array::Handle(isolate, |
| Array::MakeArray(frame_builder.pc_offset_list())); |
| const Array& full_catch_code_array = Array::Handle(isolate, |
| Array::MakeArray(frame_builder.catch_code_list())); |
| const Array& full_catch_pc_offset_array = Array::Handle(isolate, |
| Array::MakeArray(frame_builder.catch_pc_offset_list())); |
| const Stacktrace& full_stacktrace = Stacktrace::Handle( |
| Stacktrace::New(full_code_array, full_pc_offset_array)); |
| full_stacktrace.SetCatchStacktrace(full_catch_code_array, |
| full_catch_pc_offset_array); |
| return full_stacktrace.raw(); |
| } |
| |
| |
| static void ThrowExceptionHelper(Isolate* isolate, |
| const Instance& incoming_exception, |
| const Stacktrace& existing_stacktrace, |
| const bool is_rethrow) { |
| bool use_preallocated_stacktrace = false; |
| Instance& exception = Instance::Handle(isolate, incoming_exception.raw()); |
| if (exception.IsNull()) { |
| exception ^= Exceptions::Create(Exceptions::kNullThrown, |
| Object::empty_array()); |
| } else if (exception.raw() == isolate->object_store()->out_of_memory() || |
| exception.raw() == isolate->object_store()->stack_overflow()) { |
| use_preallocated_stacktrace = true; |
| } |
| uword handler_pc = 0; |
| uword handler_sp = 0; |
| uword handler_fp = 0; |
| Stacktrace& stacktrace = Stacktrace::Handle(isolate); |
| bool handler_exists = false; |
| bool handler_needs_stacktrace = false; |
| if (use_preallocated_stacktrace) { |
| stacktrace ^= isolate->object_store()->preallocated_stack_trace(); |
| PreallocatedStacktraceBuilder frame_builder(stacktrace); |
| handler_exists = FindExceptionHandler(isolate, |
| &handler_pc, |
| &handler_sp, |
| &handler_fp, |
| &handler_needs_stacktrace); |
| if (handler_needs_stacktrace) { |
| BuildStackTrace(isolate, &frame_builder); |
| } |
| } else { |
| // Get stacktrace field of class Error. |
| const Field& stacktrace_field = |
| Field::Handle(isolate, LookupStacktraceField(exception)); |
| handler_exists = FindExceptionHandler(isolate, |
| &handler_pc, |
| &handler_sp, |
| &handler_fp, |
| &handler_needs_stacktrace); |
| if (!stacktrace_field.IsNull() || handler_needs_stacktrace) { |
| Array& code_array = Array::Handle(isolate, Object::empty_array().raw()); |
| Array& pc_offset_array = |
| Array::Handle(isolate, Object::empty_array().raw()); |
| // If we have an error with a stacktrace field then collect the full stack |
| // trace and store it into the field. |
| if (!stacktrace_field.IsNull()) { |
| if (exception.GetField(stacktrace_field) == Object::null()) { |
| // This is an error object and we need to capture the full stack trace |
| // here implicitly, so we set up the stack trace. The stack trace |
| // field is set only once, it is not overriden. |
| const Stacktrace& full_stacktrace = |
| Stacktrace::Handle(isolate, Exceptions::CurrentStacktrace()); |
| exception.SetField(stacktrace_field, full_stacktrace); |
| } |
| } |
| if (handler_needs_stacktrace) { |
| RegularStacktraceBuilder frame_builder(false); |
| BuildStackTrace(isolate, &frame_builder); |
| |
| // Create arrays for code and pc_offset tuples of each frame. |
| code_array = Array::MakeArray(frame_builder.code_list()); |
| pc_offset_array = Array::MakeArray(frame_builder.pc_offset_list()); |
| } |
| if (existing_stacktrace.IsNull()) { |
| stacktrace = Stacktrace::New(code_array, pc_offset_array); |
| } else { |
| ASSERT(is_rethrow); |
| stacktrace = existing_stacktrace.raw(); |
| if (pc_offset_array.Length() != 0) { |
| // Skip the first frame during a rethrow. This is the catch clause |
| // with the rethrow statement, which is not part of the original |
| // trace a rethrow is supposed to preserve. |
| stacktrace.Append(code_array, pc_offset_array, 1); |
| } |
| // Since we are re throwing and appending to the existing stack trace |
| // we clear out the catch trace collected in the existing stack trace |
| // as that trace will not be valid anymore. |
| stacktrace.SetCatchStacktrace(Object::empty_array(), |
| Object::empty_array()); |
| } |
| } |
| } |
| // We expect to find a handler_pc, if the exception is unhandled |
| // then we expect to at least have the dart entry frame on the |
| // stack as Exceptions::Throw should happen only after a dart |
| // invocation has been done. |
| ASSERT(handler_pc != 0); |
| |
| if (FLAG_print_stacktrace_at_throw) { |
| OS::Print("Exception '%s' thrown:\n", exception.ToCString()); |
| OS::Print("%s\n", stacktrace.ToCString()); |
| } |
| if (handler_exists) { |
| // Found a dart handler for the exception, jump to it. |
| JumpToExceptionHandler(isolate, |
| handler_pc, |
| handler_sp, |
| handler_fp, |
| exception, |
| stacktrace); |
| } else { |
| // No dart exception handler found in this invocation sequence, |
| // so we create an unhandled exception object and return to the |
| // invocation stub so that it returns this unhandled exception |
| // object. The C++ code which invoked this dart sequence can check |
| // and do the appropriate thing (rethrow the exception to the |
| // dart invocation sequence above it, print diagnostics and terminate |
| // the isolate etc.). |
| const UnhandledException& unhandled_exception = UnhandledException::Handle( |
| isolate, UnhandledException::New(exception, stacktrace)); |
| stacktrace = Stacktrace::null(); |
| JumpToExceptionHandler(isolate, |
| handler_pc, |
| handler_sp, |
| handler_fp, |
| unhandled_exception, |
| stacktrace); |
| } |
| UNREACHABLE(); |
| } |
| |
| |
| // Static helpers for allocating, initializing, and throwing an error instance. |
| |
| // Return the script of the Dart function that called the native entry or the |
| // runtime entry. The frame iterator points to the callee. |
| RawScript* Exceptions::GetCallerScript(DartFrameIterator* iterator) { |
| StackFrame* caller_frame = iterator->NextFrame(); |
| ASSERT(caller_frame != NULL && caller_frame->IsDartFrame()); |
| const Function& caller = Function::Handle(caller_frame->LookupDartFunction()); |
| ASSERT(!caller.IsNull()); |
| return caller.script(); |
| } |
| |
| |
| // Allocate a new instance of the given class name. |
| // TODO(hausner): Rename this NewCoreInstance to call out the fact that |
| // the class name is resolved in the core library implicitly? |
| RawInstance* Exceptions::NewInstance(const char* class_name) { |
| const String& cls_name = String::Handle(Symbols::New(class_name)); |
| const Library& core_lib = Library::Handle(Library::CoreLibrary()); |
| // No ambiguity error expected: passing NULL. |
| Class& cls = Class::Handle(core_lib.LookupClass(cls_name)); |
| ASSERT(!cls.IsNull()); |
| // There are no parameterized error types, so no need to set type arguments. |
| return Instance::New(cls); |
| } |
| |
| |
| // Allocate, initialize, and throw a TypeError or CastError. |
| // If error_msg is not null, throw a TypeError, even for a type cast. |
| void Exceptions::CreateAndThrowTypeError(intptr_t location, |
| const String& src_type_name, |
| const String& dst_type_name, |
| const String& dst_name, |
| const String& error_msg) { |
| const Array& args = Array::Handle(Array::New(7)); |
| |
| ExceptionType exception_type = |
| (error_msg.IsNull() && dst_name.Equals(kCastErrorDstName)) ? |
| kCast : kType; |
| |
| DartFrameIterator iterator; |
| const Script& script = Script::Handle(GetCallerScript(&iterator)); |
| intptr_t line; |
| intptr_t column = -1; |
| if (script.HasSource()) { |
| script.GetTokenLocation(location, &line, &column); |
| } else { |
| script.GetTokenLocation(location, &line, NULL); |
| } |
| // Initialize '_url', '_line', and '_column' arguments. |
| args.SetAt(0, String::Handle(script.url())); |
| args.SetAt(1, Smi::Handle(Smi::New(line))); |
| args.SetAt(2, Smi::Handle(Smi::New(column))); |
| |
| // Initialize '_srcType', '_dstType', '_dstName', and '_errorMsg'. |
| args.SetAt(3, src_type_name); |
| args.SetAt(4, dst_type_name); |
| args.SetAt(5, dst_name); |
| args.SetAt(6, error_msg); |
| |
| // Type errors in the core library may be difficult to diagnose. |
| // Print type error information before throwing the error when debugging. |
| if (FLAG_print_stacktrace_at_throw) { |
| if (!error_msg.IsNull()) { |
| OS::Print("%s\n", error_msg.ToCString()); |
| } |
| OS::Print("'%s': Failed type check: line %" Pd " pos %" Pd ": ", |
| String::Handle(script.url()).ToCString(), line, column); |
| if (!dst_name.IsNull() && (dst_name.Length() > 0)) { |
| OS::Print("type '%s' is not a subtype of type '%s' of '%s'.\n", |
| src_type_name.ToCString(), |
| dst_type_name.ToCString(), |
| dst_name.ToCString()); |
| } else { |
| OS::Print("type error.\n"); |
| } |
| } |
| // Throw TypeError or CastError instance. |
| Exceptions::ThrowByType(exception_type, args); |
| UNREACHABLE(); |
| } |
| |
| |
| void Exceptions::Throw(Isolate* isolate, const Instance& exception) { |
| // Do not notify debugger on stack overflow and out of memory exceptions. |
| // The VM would crash when the debugger calls back into the VM to |
| // get values of variables. |
| if (exception.raw() != isolate->object_store()->out_of_memory() && |
| exception.raw() != isolate->object_store()->stack_overflow()) { |
| isolate->debugger()->SignalExceptionThrown(exception); |
| } |
| // Null object is a valid exception object. |
| ThrowExceptionHelper(isolate, exception, Stacktrace::Handle(isolate), false); |
| } |
| |
| |
| void Exceptions::ReThrow(Isolate* isolate, |
| const Instance& exception, |
| const Stacktrace& stacktrace) { |
| // Null object is a valid exception object. |
| ThrowExceptionHelper(isolate, exception, stacktrace, true); |
| } |
| |
| |
| void Exceptions::PropagateError(const Error& error) { |
| Isolate* isolate = Isolate::Current(); |
| ASSERT(isolate->top_exit_frame_info() != 0); |
| if (error.IsUnhandledException()) { |
| // If the error object represents an unhandled exception, then |
| // rethrow the exception in the normal fashion. |
| const UnhandledException& uhe = UnhandledException::Cast(error); |
| const Instance& exc = Instance::Handle(isolate, uhe.exception()); |
| const Stacktrace& stk = Stacktrace::Handle(isolate, uhe.stacktrace()); |
| Exceptions::ReThrow(isolate, exc, stk); |
| } else { |
| // Return to the invocation stub and return this error object. The |
| // C++ code which invoked this dart sequence can check and do the |
| // appropriate thing. |
| uword handler_pc = 0; |
| uword handler_sp = 0; |
| uword handler_fp = 0; |
| FindErrorHandler(&handler_pc, &handler_sp, &handler_fp); |
| JumpToExceptionHandler(isolate, handler_pc, handler_sp, handler_fp, error, |
| Stacktrace::Handle(isolate)); // Null stacktrace. |
| } |
| UNREACHABLE(); |
| } |
| |
| |
| void Exceptions::ThrowByType(ExceptionType type, const Array& arguments) { |
| Isolate* isolate = Isolate::Current(); |
| const Object& result = Object::Handle(isolate, Create(type, arguments)); |
| if (result.IsError()) { |
| // We got an error while constructing the exception object. |
| // Propagate the error instead of throwing the exception. |
| PropagateError(Error::Cast(result)); |
| } else { |
| ASSERT(result.IsInstance()); |
| Throw(isolate, Instance::Cast(result)); |
| } |
| } |
| |
| |
| void Exceptions::ThrowOOM() { |
| Isolate* isolate = Isolate::Current(); |
| const Instance& oom = Instance::Handle( |
| isolate, isolate->object_store()->out_of_memory()); |
| Throw(isolate, oom); |
| } |
| |
| |
| void Exceptions::ThrowStackOverflow() { |
| Isolate* isolate = Isolate::Current(); |
| const Instance& stack_overflow = Instance::Handle( |
| isolate, isolate->object_store()->stack_overflow()); |
| Throw(isolate, stack_overflow); |
| } |
| |
| |
| void Exceptions::ThrowArgumentError(const Instance& arg) { |
| const Array& args = Array::Handle(Array::New(1)); |
| args.SetAt(0, arg); |
| Exceptions::ThrowByType(Exceptions::kArgument, args); |
| } |
| |
| |
| void Exceptions::ThrowRangeError(const char* argument_name, |
| const Integer& argument_value, |
| intptr_t expected_from, |
| intptr_t expected_to) { |
| const String& error = String::Handle(String::NewFormatted( |
| "%s (%s) must be in the range [%" Pd "..%" Pd ")", |
| argument_name, |
| argument_value.ToCString(), |
| expected_from, |
| expected_to)); |
| |
| const Array& args = Array::Handle(Array::New(1)); |
| args.SetAt(0, error); |
| Exceptions::ThrowByType(Exceptions::kRange, args); |
| } |
| |
| |
| RawObject* Exceptions::Create(ExceptionType type, const Array& arguments) { |
| Library& library = Library::Handle(); |
| const String* class_name = NULL; |
| const String* constructor_name = &Symbols::Dot(); |
| switch (type) { |
| case kNone: |
| case kStackOverflow: |
| case kOutOfMemory: |
| UNREACHABLE(); |
| break; |
| case kRange: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::RangeError(); |
| break; |
| case kArgument: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::ArgumentError(); |
| break; |
| case kNoSuchMethod: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::NoSuchMethodError(); |
| constructor_name = &Symbols::DotWithType(); |
| break; |
| case kFormat: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::FormatException(); |
| break; |
| case kUnsupported: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::UnsupportedError(); |
| break; |
| case kNullThrown: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::NullThrownError(); |
| break; |
| case kIsolateSpawn: |
| library = Library::IsolateLibrary(); |
| class_name = &Symbols::IsolateSpawnException(); |
| break; |
| case kIsolateUnhandledException: |
| library = Library::IsolateLibrary(); |
| class_name = &Symbols::IsolateUnhandledException(); |
| break; |
| case kJavascriptIntegerOverflowError: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::JavascriptIntegerOverflowError(); |
| break; |
| case kJavascriptCompatibilityError: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::JavascriptCompatibilityError(); |
| break; |
| case kAssertion: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::AssertionError(); |
| constructor_name = &Symbols::DotCreate(); |
| break; |
| case kCast: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::CastError(); |
| constructor_name = &Symbols::DotCreate(); |
| break; |
| case kType: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::TypeError(); |
| constructor_name = &Symbols::DotCreate(); |
| break; |
| case kFallThrough: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::FallThroughError(); |
| constructor_name = &Symbols::DotCreate(); |
| break; |
| case kAbstractClassInstantiation: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::AbstractClassInstantiationError(); |
| constructor_name = &Symbols::DotCreate(); |
| break; |
| case kCyclicInitializationError: |
| library = Library::CoreLibrary(); |
| class_name = &Symbols::CyclicInitializationError(); |
| } |
| |
| return DartLibraryCalls::InstanceCreate(library, |
| *class_name, |
| *constructor_name, |
| arguments); |
| } |
| |
| |
| // Throw JavascriptCompatibilityError exception. |
| void Exceptions::ThrowJavascriptCompatibilityError(const char* msg) { |
| const Array& exc_args = Array::Handle(Array::New(1)); |
| const String& msg_str = String::Handle(String::New(msg)); |
| exc_args.SetAt(0, msg_str); |
| Exceptions::ThrowByType(Exceptions::kJavascriptCompatibilityError, exc_args); |
| } |
| |
| } // namespace dart |
