1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ConstructData.h"
#ifdef QT_BUILD_SCRIPT_LIB
#include "ExceptionHelpers.h"
#include "Interpreter.h"
#include "JSGlobalObject.h"
#endif
#include "JSFunction.h"
namespace JSC {
JSObject* construct(ExecState* exec, JSValue callee, ConstructType constructType, const ConstructData& constructData, const ArgList& args)
{
if (constructType == ConstructTypeHost) {
#ifdef QT_BUILD_SCRIPT_LIB
Structure* structure;
JSValue prototype = callee.get(exec, exec->propertyNames().prototype);
if (prototype.isObject())
structure = asObject(prototype)->inheritorID();
else
structure = exec->lexicalGlobalObject()->emptyObjectStructure();
JSObject* thisObj = new (exec) JSObject(structure);
ScopeChainNode* scopeChain = exec->scopeChain();
Interpreter *interp = exec->interpreter();
Register *oldEnd = interp->registerFile().end();
int argc = 1 + args.size(); // implicit "this" parameter
if (!interp->registerFile().grow(oldEnd + argc + RegisterFile::CallFrameHeaderSize))
return asObject(createStackOverflowError(exec));
CallFrame* newCallFrame = CallFrame::create(oldEnd);
size_t dst = 0;
newCallFrame[0] = JSValue(thisObj);
ArgList::const_iterator it;
for (it = args.begin(); it != args.end(); ++it)
newCallFrame[++dst] = *it;
newCallFrame += argc + RegisterFile::CallFrameHeaderSize;
newCallFrame->init(0, /*vPC=*/0, scopeChain, exec, 0, argc, asObject(callee));
JSObject *result = constructData.native.function(newCallFrame, asObject(callee), args);
interp->registerFile().shrink(oldEnd);
return result;
#else
return constructData.native.function(exec, asObject(object), args);
#endif
}
ASSERT(constructType == ConstructTypeJS);
// FIXME: Can this be done more efficiently using the constructData?
return asFunction(callee)->construct(exec, args);
}
} // namespace JSC
|
