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(c: ctx); |
47 | APIEntryShim entryShim(exec); |
48 | |
49 | JSObject* jsThisObject = toJS(o: thisObject); |
50 | |
51 | // evaluate sets "this" to the global object if it is NULL |
52 | JSGlobalObject* globalObject = exec->dynamicGlobalObject(); |
53 | SourceCode source = makeSource(source: script->ustring(), url: sourceURL->ustring(), firstLine: startingLineNumber); |
54 | Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, thisValue: jsThisObject); |
55 | |
56 | if (completion.complType() == Throw) { |
57 | if (exception) |
58 | *exception = toRef(exec, v: completion.value()); |
59 | return 0; |
60 | } |
61 | |
62 | if (completion.value()) |
63 | return toRef(exec, v: completion.value()); |
64 | |
65 | // happens, for example, when the only statement is an empty (';') statement |
66 | return toRef(exec, v: jsUndefined()); |
67 | } |
68 | |
69 | bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception) |
70 | { |
71 | ExecState* exec = toJS(c: ctx); |
72 | APIEntryShim entryShim(exec); |
73 | |
74 | SourceCode source = makeSource(source: script->ustring(), url: sourceURL->ustring(), firstLine: startingLineNumber); |
75 | Completion completion = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source); |
76 | if (completion.complType() == Throw) { |
77 | if (exception) |
78 | *exception = toRef(exec, v: 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(c: 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 (JSContextRef ctx, size_t size) |
108 | { |
109 | ExecState* exec = toJS(c: ctx); |
110 | APIEntryShim entryShim(exec); |
111 | exec->globalData().heap.reportExtraMemoryCost(cost: size); |
112 | } |
113 | |