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 "CallFrame.h"
33#include "Completion.h"
34#include "InitializeThreading.h"
35#include "JSGlobalObject.h"
36#include "JSLock.h"
37#include "JSObject.h"
38#include "OpaqueJSString.h"
39#include "Operations.h"
40#include "SourceCode.h"
41#include <wtf/text/StringHash.h>
42
43using namespace JSC;
44
45JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
46{
47    if (!ctx) {
48        ASSERT_NOT_REACHED();
49        return 0;
50    }
51    ExecState* exec = toJS(ctx);
52    APIEntryShim entryShim(exec);
53
54    JSObject* jsThisObject = toJS(thisObject);
55
56    // evaluate sets "this" to the global object if it is NULL
57    JSGlobalObject* globalObject = exec->dynamicGlobalObject();
58    SourceCode source = makeSource(script->string(), sourceURL->string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()));
59
60    JSValue evaluationException;
61    JSValue returnValue = evaluate(globalObject->globalExec(), source, jsThisObject, &evaluationException);
62
63    if (evaluationException) {
64        if (exception)
65            *exception = toRef(exec, evaluationException);
66        return 0;
67    }
68
69    if (returnValue)
70        return toRef(exec, returnValue);
71
72    // happens, for example, when the only statement is an empty (';') statement
73    return toRef(exec, jsUndefined());
74}
75
76bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
77{
78    if (!ctx) {
79        ASSERT_NOT_REACHED();
80        return false;
81    }
82    ExecState* exec = toJS(ctx);
83    APIEntryShim entryShim(exec);
84
85    SourceCode source = makeSource(script->string(), sourceURL->string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()));
86
87    JSValue syntaxException;
88    bool isValidSyntax = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source, &syntaxException);
89
90    if (!isValidSyntax) {
91        if (exception)
92            *exception = toRef(exec, syntaxException);
93        return false;
94    }
95
96    return true;
97}
98
99void JSGarbageCollect(JSContextRef ctx)
100{
101    // We used to recommend passing NULL as an argument here, which caused the only heap to be collected.
102    // As there is no longer a shared heap, the previously recommended usage became a no-op (but the GC
103    // will happen when the context group is destroyed).
104    // Because the function argument was originally ignored, some clients may pass their released context here,
105    // in which case there is a risk of crashing if another thread performs GC on the same heap in between.
106    if (!ctx)
107        return;
108
109    ExecState* exec = toJS(ctx);
110    APIEntryShim entryShim(exec, false);
111
112    exec->vm().heap.reportAbandonedObjectGraph();
113}
114
115void JSReportExtraMemoryCost(JSContextRef ctx, size_t size)
116{
117    if (!ctx) {
118        ASSERT_NOT_REACHED();
119        return;
120    }
121    ExecState* exec = toJS(ctx);
122    APIEntryShim entryShim(exec);
123    exec->vm().heap.reportExtraMemoryCost(size);
124}
125
126extern "C" JS_EXPORT void JSSynchronousGarbageCollectForDebugging(JSContextRef);
127
128void JSSynchronousGarbageCollectForDebugging(JSContextRef ctx)
129{
130    if (!ctx)
131        return;
132
133    ExecState* exec = toJS(ctx);
134    APIEntryShim entryShim(exec);
135    exec->vm().heap.collectAllGarbage();
136}
137