Dmitry Olshansky
a32a3a6d2f
This speeds up frequently throwing exception at the same place(s) in the code. R=fschneider@google.com, vegorov@google.com Review-Url: https://codereview.chromium.org/2683633005 .
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_EXCEPTIONS_H_
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#define RUNTIME_VM_EXCEPTIONS_H_
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#include "vm/allocation.h"
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#include "vm/token_position.h"
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namespace dart {
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// Forward declarations.
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class AbstractType;
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class Array;
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class DartFrameIterator;
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class Error;
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class LanguageError;
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class Instance;
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class Integer;
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class RawInstance;
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class RawObject;
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class RawScript;
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class RawStackTrace;
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class String;
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class Thread;
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class Exceptions : AllStatic {
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public:
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static void Throw(Thread* thread, const Instance& exception);
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static void ReThrow(Thread* thread,
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const Instance& exception,
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const Instance& stacktrace);
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static void PropagateError(const Error& error);
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// Helpers to create and throw errors.
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static RawStackTrace* CurrentStackTrace();
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static RawScript* GetCallerScript(DartFrameIterator* iterator);
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static RawInstance* NewInstance(const char* class_name);
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static void CreateAndThrowTypeError(TokenPosition location,
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const AbstractType& src_type,
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const AbstractType& dst_type,
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const String& dst_name,
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const String& bound_error_msg);
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enum ExceptionType {
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kNone,
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kRange,
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kArgument,
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kArgumentValue,
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kNoSuchMethod,
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kFormat,
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kUnsupported,
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kStackOverflow,
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kOutOfMemory,
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kNullThrown,
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kIsolateSpawn,
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kAssertion,
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kCast,
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kType,
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kFallThrough,
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kAbstractClassInstantiation,
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kCyclicInitializationError,
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kCompileTimeError,
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};
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static void ThrowByType(ExceptionType type, const Array& arguments);
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// Uses the preallocated out of memory exception to avoid calling
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// into Dart code or allocating any code.
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static void ThrowOOM();
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static void ThrowStackOverflow();
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static void ThrowArgumentError(const Instance& arg);
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static void ThrowRangeError(const char* argument_name,
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const Integer& argument_value,
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intptr_t expected_from,
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intptr_t expected_to);
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static void ThrowCompileTimeError(const LanguageError& error);
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// Returns a RawInstance if the exception is successfully created,
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// otherwise returns a RawError.
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static RawObject* Create(ExceptionType type, const Array& arguments);
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static void JumpToFrame(Thread* thread,
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uword program_counter,
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uword stack_pointer,
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uword frame_pointer,
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bool clear_deopt_at_target);
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private:
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DISALLOW_COPY_AND_ASSIGN(Exceptions);
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};
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// The index into the ExceptionHandlers table corresponds to
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// the try_index of the handler.
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struct ExceptionHandlerInfo {
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uint32_t handler_pc_offset; // PC offset value of handler.
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int16_t outer_try_index; // Try block index of enclosing try block.
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int8_t needs_stacktrace; // True if a stacktrace is needed.
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int8_t has_catch_all; // Catches all exceptions.
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};
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} // namespace dart
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#endif // RUNTIME_VM_EXCEPTIONS_H_
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