1 /* 2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "JSBase.h" 28 #include "JSBasePrivate.h" 29 30 #include "APICast.h" 31 #include "APIShims.h" 32 #include "Completion.h" 33 #include "OpaqueJSString.h" 34 #include "SourceCode.h" 35 #include <interpreter/CallFrame.h> 36 #include <runtime/InitializeThreading.h> 37 #include <runtime/Completion.h> 38 #include <runtime/JSGlobalObject.h> 39 #include <runtime/JSLock.h> 40 #include <runtime/JSObject.h> 41 42 using namespace JSC; 43 44 JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception) 45 { 46 ExecState* exec = toJS(ctx); 47 APIEntryShim entryShim(exec); 48 49 JSObject* jsThisObject = toJS(thisObject); 50 51 // evaluate sets "this" to the global object if it is NULL 52 JSGlobalObject* globalObject = exec->dynamicGlobalObject(); 53 SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber); 54 Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, jsThisObject); 55 56 if (completion.complType() == Throw) { 57 if (exception) 58 *exception = toRef(exec, completion.value()); 59 return 0; 60 } 61 62 if (completion.value()) 63 return toRef(exec, completion.value()); 64 65 // happens, for example, when the only statement is an empty (';') statement 66 return toRef(exec, jsUndefined()); 67 } 68 69 bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception) 70 { 71 ExecState* exec = toJS(ctx); 72 APIEntryShim entryShim(exec); 73 74 SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber); 75 Completion completion = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source); 76 if (completion.complType() == Throw) { 77 if (exception) 78 *exception = toRef(exec, completion.value()); 79 return false; 80 } 81 82 return true; 83 } 84 85 void JSGarbageCollect(JSContextRef ctx) 86 { 87 // We used to recommend passing NULL as an argument here, which caused the only heap to be collected. 88 // As there is no longer a shared heap, the previously recommended usage became a no-op (but the GC 89 // will happen when the context group is destroyed). 90 // Because the function argument was originally ignored, some clients may pass their released context here, 91 // in which case there is a risk of crashing if another thread performs GC on the same heap in between. 92 if (!ctx) 93 return; 94 95 ExecState* exec = toJS(ctx); 96 APIEntryShim entryShim(exec, false); 97 98 JSGlobalData& globalData = exec->globalData(); 99 if (!globalData.heap.isBusy()) 100 globalData.heap.collectAllGarbage(); 101 102 // FIXME: Perhaps we should trigger a second mark and sweep 103 // once the garbage collector is done if this is called when 104 // the collector is busy. 105 } 106 107 void JSReportExtraMemoryCost(JSContextRef ctx, size_t size) 108 { 109 ExecState* exec = toJS(ctx); 110 APIEntryShim entryShim(exec); 111 exec->globalData().heap.reportExtraMemoryCost(size); 112 } 113