API/JSScriptRef.cpp

   1 /*
   2  * Copyright (C) 2012 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 INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #include "APICast.h"
  29 #include "Completion.h"
  30 #include "Exception.h"
  31 #include "JSBasePrivate.h"
  32 #include "VM.h"
  33 #include "JSScriptRefPrivate.h"
  34 #include "OpaqueJSString.h"
  35 #include "JSCInlines.h"
  36 #include "Parser.h"
  37 #include "SourceCode.h"
  38 #include "SourceProvider.h"
  39
  40 using namespace JSC;
  41
  42 struct OpaqueJSScript : public SourceProvider {
  43 public:
  44     static WTF::RefPtr<OpaqueJSScript> create(VM* vm, const String& url, int startingLineNumber, const String& source)
  45     {
  46         return WTF::adoptRef(*new OpaqueJSScript(vm, url, startingLineNumber, source));
  47     }
  48
  49     virtual const String& source() const override
  50     {
  51         return m_source;
  52     }
  53
  54     VM* vm() const { return m_vm; }
  55
  56 private:
  57     OpaqueJSScript(VM* vm, const String& url, int startingLineNumber, const String& source)
  58         : SourceProvider(url, TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()))
  59         , m_vm(vm)
  60         , m_source(source)
  61     {
  62     }
  63
  64     virtual ~OpaqueJSScript() { }
  65
  66     VM* m_vm;
  67     String m_source;
  68 };
  69
  70 static bool parseScript(VM* vm, const SourceCode& source, ParserError& error)
  71 {
  72     return !!JSC::parse<JSC::ProgramNode>(
  73         vm, source, 0, Identifier(), JSParserBuiltinMode::NotBuiltin,
  74         JSParserStrictMode::NotStrict, JSParserCodeType::Program,
  75         error);
  76 }
  77
  78 extern "C" {
  79
  80 JSScriptRef JSScriptCreateReferencingImmortalASCIIText(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, const char* source, size_t length, JSStringRef* errorMessage, int* errorLine)
  81 {
  82     VM* vm = toJS(contextGroup);
  83     JSLockHolder locker(vm);
  84     for (size_t i = 0; i < length; i++) {
  85         if (!isASCII(source[i]))
  86             return 0;
  87     }
  88
  89     startingLineNumber = std::max(1, startingLineNumber);
  90
  91     RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url ? url->string() : String(), startingLineNumber, String(StringImpl::createFromLiteral(source, length)));
  92
  93     ParserError error;
  94     if (!parseScript(vm, SourceCode(result), error)) {
  95         if (errorMessage)
  96             *errorMessage = OpaqueJSString::create(error.message()).leakRef();
  97         if (errorLine)
  98             *errorLine = error.line();
  99         return nullptr;
 100     }
 101
 102     return result.release().leakRef();
 103 }
 104
 105 JSScriptRef JSScriptCreateFromString(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, JSStringRef source, JSStringRef* errorMessage, int* errorLine)
 106 {
 107     VM* vm = toJS(contextGroup);
 108     JSLockHolder locker(vm);
 109
 110     startingLineNumber = std::max(1, startingLineNumber);
 111
 112     RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url ? url->string() : String(), startingLineNumber, source->string());
 113
 114     ParserError error;
 115     if (!parseScript(vm, SourceCode(result), error)) {
 116         if (errorMessage)
 117             *errorMessage = OpaqueJSString::create(error.message()).leakRef();
 118         if (errorLine)
 119             *errorLine = error.line();
 120         return nullptr;
 121     }
 122
 123     return result.release().leakRef();
 124 }
 125
 126 void JSScriptRetain(JSScriptRef script)
 127 {
 128     JSLockHolder locker(script->vm());
 129     script->ref();
 130 }
 131
 132 void JSScriptRelease(JSScriptRef script)
 133 {
 134     JSLockHolder locker(script->vm());
 135     script->deref();
 136 }
 137
 138 JSValueRef JSScriptEvaluate(JSContextRef context, JSScriptRef script, JSValueRef thisValueRef, JSValueRef* exception)
 139 {
 140     ExecState* exec = toJS(context);
 141     JSLockHolder locker(exec);
 142     if (script->vm() != &exec->vm()) {
 143         RELEASE_ASSERT_NOT_REACHED();
 144         return 0;
 145     }
 146     NakedPtr<Exception> internalException;
 147     JSValue thisValue = thisValueRef ? toJS(exec, thisValueRef) : jsUndefined();
 148     JSValue result = evaluate(exec, SourceCode(script), thisValue, internalException);
 149     if (internalException) {
 150         if (exception)
 151             *exception = toRef(exec, internalException->value());
 152         return 0;
 153     }
 154     ASSERT(result);
 155     return toRef(exec, result);
 156 }
 157
 158 }