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Diffstat (limited to 'src/3rdparty/v8/src/liveedit.h')
| -rw-r--r-- | src/3rdparty/v8/src/liveedit.h | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/src/3rdparty/v8/src/liveedit.h b/src/3rdparty/v8/src/liveedit.h deleted file mode 100644 index 5b12854..0000000 --- a/src/3rdparty/v8/src/liveedit.h +++ /dev/null @@ -1,183 +0,0 @@ -// Copyright 2012 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#ifndef V8_LIVEEDIT_H_ -#define V8_LIVEEDIT_H_ - - - -// Live Edit feature implementation. -// User should be able to change script on already running VM. This feature -// matches hot swap features in other frameworks. -// -// The basic use-case is when user spots some mistake in function body -// from debugger and wishes to change the algorithm without restart. -// -// A single change always has a form of a simple replacement (in pseudo-code): -// script.source[positions, positions+length] = new_string; -// Implementation first determines, which function's body includes this -// change area. Then both old and new versions of script are fully compiled -// in order to analyze, whether the function changed its outer scope -// expectations (or number of parameters). If it didn't, function's code is -// patched with a newly compiled code. If it did change, enclosing function -// gets patched. All inner functions are left untouched, whatever happened -// to them in a new script version. However, new version of code will -// instantiate newly compiled functions. - - -#include "allocation.h" -#include "compiler.h" - -namespace v8 { -namespace internal { - -// This class collects some specific information on structure of functions -// in a particular script. It gets called from compiler all the time, but -// actually records any data only when liveedit operation is in process; -// in any other time this class is very cheap. -// -// The primary interest of the Tracker is to record function scope structures -// in order to analyze whether function code maybe safely patched (with new -// code successfully reading existing data from function scopes). The Tracker -// also collects compiled function codes. -class LiveEditFunctionTracker { - public: - explicit LiveEditFunctionTracker(Isolate* isolate, FunctionLiteral* fun); - ~LiveEditFunctionTracker(); - void RecordFunctionInfo(Handle<SharedFunctionInfo> info, - FunctionLiteral* lit, Zone* zone); - void RecordRootFunctionInfo(Handle<Code> code); - - static bool IsActive(Isolate* isolate); - - private: -#ifdef ENABLE_DEBUGGER_SUPPORT - Isolate* isolate_; -#endif -}; - -#ifdef ENABLE_DEBUGGER_SUPPORT - -class LiveEdit : AllStatic { - public: - static JSArray* GatherCompileInfo(Handle<Script> script, - Handle<String> source); - - static void WrapSharedFunctionInfos(Handle<JSArray> array); - - MUST_USE_RESULT static MaybeObject* ReplaceFunctionCode( - Handle<JSArray> new_compile_info_array, - Handle<JSArray> shared_info_array); - - static MaybeObject* FunctionSourceUpdated(Handle<JSArray> shared_info_array); - - // Updates script field in FunctionSharedInfo. - static void SetFunctionScript(Handle<JSValue> function_wrapper, - Handle<Object> script_handle); - - MUST_USE_RESULT static MaybeObject* PatchFunctionPositions( - Handle<JSArray> shared_info_array, Handle<JSArray> position_change_array); - - // For a script updates its source field. If old_script_name is provided - // (i.e. is a String), also creates a copy of the script with its original - // source and sends notification to debugger. - static Object* ChangeScriptSource(Handle<Script> original_script, - Handle<String> new_source, - Handle<Object> old_script_name); - - // In a code of a parent function replaces original function as embedded - // object with a substitution one. - static void ReplaceRefToNestedFunction(Handle<JSValue> parent_function_shared, - Handle<JSValue> orig_function_shared, - Handle<JSValue> subst_function_shared); - - // Checks listed functions on stack and return array with corresponding - // FunctionPatchabilityStatus statuses; extra array element may - // contain general error message. Modifies the current stack and - // has restart the lowest found frames and drops all other frames above - // if possible and if do_drop is true. - static Handle<JSArray> CheckAndDropActivations( - Handle<JSArray> shared_info_array, bool do_drop, Zone* zone); - - // Restarts the call frame and completely drops all frames above it. - // Return error message or NULL. - static const char* RestartFrame(JavaScriptFrame* frame, Zone* zone); - - // A copy of this is in liveedit-debugger.js. - enum FunctionPatchabilityStatus { - FUNCTION_AVAILABLE_FOR_PATCH = 1, - FUNCTION_BLOCKED_ON_ACTIVE_STACK = 2, - FUNCTION_BLOCKED_ON_OTHER_STACK = 3, - FUNCTION_BLOCKED_UNDER_NATIVE_CODE = 4, - FUNCTION_REPLACED_ON_ACTIVE_STACK = 5 - }; - - // Compares 2 strings line-by-line, then token-wise and returns diff in form - // of array of triplets (pos1, pos1_end, pos2_end) describing list - // of diff chunks. - static Handle<JSArray> CompareStrings(Handle<String> s1, - Handle<String> s2); -}; - - -// A general-purpose comparator between 2 arrays. -class Comparator { - public: - // Holds 2 arrays of some elements allowing to compare any pair of - // element from the first array and element from the second array. - class Input { - public: - virtual int GetLength1() = 0; - virtual int GetLength2() = 0; - virtual bool Equals(int index1, int index2) = 0; - - protected: - virtual ~Input() {} - }; - - // Receives compare result as a series of chunks. - class Output { - public: - // Puts another chunk in result list. Note that technically speaking - // only 3 arguments actually needed with 4th being derivable. - virtual void AddChunk(int pos1, int pos2, int len1, int len2) = 0; - - protected: - virtual ~Output() {} - }; - - // Finds the difference between 2 arrays of elements. - static void CalculateDifference(Input* input, - Output* result_writer); -}; - -#endif // ENABLE_DEBUGGER_SUPPORT - - -} } // namespace v8::internal - -#endif /* V*_LIVEEDIT_H_ */ |