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
JSEvaluateScript(JSContextRef ctx,JSStringRef script,JSObjectRef thisObject,JSStringRef sourceURL,int startingLineNumber,JSValueRef * exception)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
JSCheckScriptSyntax(JSContextRef ctx,JSStringRef script,JSStringRef sourceURL,int startingLineNumber,JSValueRef * exception)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
JSGarbageCollect(JSContextRef ctx)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
JSReportExtraMemoryCost(JSContextRef ctx,size_t size)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