srdjan@google.com
7d945c593a
Add two different PCDescriptors to differentiate between optimized and unoptimized static calls (the former loads args. descr, the later loads ICData before calling). Populate static call's ic_data field when optimizing. R=asiva@google.com Review URL: https://codereview.chromium.org//17723002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24433 260f80e4-7a28-3924-810f-c04153c831b5
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
// Copyright (c) 2012, 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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// Class for patching compiled code.
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#ifndef VM_CODE_PATCHER_H_
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#define VM_CODE_PATCHER_H_
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#include "vm/allocation.h"
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namespace dart {
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// Forward declaration.
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class Array;
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class Code;
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class ExternalLabel;
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class Function;
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class ICData;
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class RawArray;
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class RawFunction;
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class RawICData;
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class String;
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class CodePatcher : public AllStatic {
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public:
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// Dart static calls have a distinct, machine-dependent code pattern.
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// Patch static call before return_address in given code to the new target.
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static void PatchStaticCallAt(uword return_address,
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const Code& code,
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uword new_target_address);
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// Patch instance call before return_address in given code to the new target.
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static void PatchInstanceCallAt(uword return_address,
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const Code& code,
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uword new_target_address);
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// Patch entry point with a jump as specified in the code's patch region.
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static void PatchEntry(const Code& code);
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// Restore entry point with original code (i.e., before patching).
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static void RestoreEntry(const Code& code);
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// Returns true if the code can be patched with a jump at beginnning (checks
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// that there are no conflicts with object pointers). Used in ASSERTs.
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static bool CodeIsPatchable(const Code& code);
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// Return the target address of the static call before return_address
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// in given code.
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static uword GetStaticCallTargetAt(uword return_address, const Code& code);
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// Get instance call information. Returns the call target and sets each
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// of the output parameters ic_data and arguments_descriptor if they are
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// non-NULL.
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static uword GetInstanceCallAt(uword return_address,
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const Code& code,
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ICData* ic_data);
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// Return target of an unoptimized static call and its ICData object
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// (calls target via a stub).
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static RawFunction* GetUnoptimizedStaticCallAt(uword return_address,
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const Code& code,
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ICData* ic_data);
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// Return the arguments descriptor array of the closure call
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// before the given return address.
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static RawArray* GetClosureArgDescAt(uword return_address,
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const Code& code);
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static intptr_t InstanceCallSizeInBytes();
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static void InsertCallAt(uword start, uword target);
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};
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} // namespace dart
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#endif // VM_CODE_PATCHER_H_
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