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#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    ExecState* exec = toJS(ctx);
48    APIEntryShim entryShim(exec);
49
50    JSObject* jsThisObject = toJS(thisObject);
51
52    // evaluate sets "this" to the global object if it is NULL
53    JSGlobalObject* globalObject = exec->dynamicGlobalObject();
54    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);
55    Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, jsThisObject);
56
57    if (completion.complType() == Throw) {
58        if (exception)
59            *exception = toRef(exec, completion.value());
60        return 0;
61    }
62
63    if (completion.value())
64        return toRef(exec, completion.value());
65
66    // happens, for example, when the only statement is an empty (';') statement
67    return toRef(exec, jsUndefined());
68}
69
70bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
71{
72    ExecState* exec = toJS(ctx);
73    APIEntryShim entryShim(exec);
74
75    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);
76    Completion completion = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source);
77    if (completion.complType() == Throw) {
78        if (exception)
79            *exception = toRef(exec, completion.value());
80        return false;
81    }
82
83    return true;
84}
85
86void JSGarbageCollect(JSContextRef ctx)
87{
88    // We used to recommend passing NULL as an argument here, which caused the only heap to be collected.
89    // As there is no longer a shared heap, the previously recommended usage became a no-op (but the GC
90    // will happen when the context group is destroyed).
91    // Because the function argument was originally ignored, some clients may pass their released context here,
92    // in which case there is a risk of crashing if another thread performs GC on the same heap in between.
93    if (!ctx)
94        return;
95
96    ExecState* exec = toJS(ctx);
97    APIEntryShim entryShim(exec, false);
98
99    JSGlobalData& globalData = exec->globalData();
100    if (!globalData.heap.isBusy())
101        globalData.heap.collectAllGarbage();
102
103    // FIXME: Perhaps we should trigger a second mark and sweep
104    // once the garbage collector is done if this is called when
105    // the collector is busy.
106}
107
108void JSReportExtraMemoryCost(JSContextRef ctx, size_t size)
109{
110    ExecState* exec = toJS(ctx);
111    APIEntryShim entryShim(exec);
112    exec->globalData().heap.reportExtraMemoryCost(size);
113}
114