source: webkit/trunk/JavaScriptCore/JavaScriptCore.exp@ 34838

Last change on this file since 34838 was 34838, checked in by [email protected], 17 years ago

JavaScriptCore:

2008-06-27 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.


One RegisterFile to rule them all!


SunSpider reports a 0.2% speedup.

This patch removes the RegisterFileStack abstraction and replaces it with
a single register file that


(a) allocates a fixed storage area, including a fixed area for global
vars, so that no operation may cause the register file to reallocate


and

(b) swaps between global storage areas when executing code in different
global objects.


This patch also changes the layout of the register file so that all call
frames, including call frames for global code, get a header. This is
required to support re-entrant global code. It also just makes things simpler.


  • VM/CodeGenerator.cpp: (KJS::CodeGenerator::addGlobalVar): New function. Differs from addVar in that


(a) global vars don't contribute to a CodeBlock's numLocals count, since
global storage is fixed and allocated at startup


and


(b) references to global vars get shifted to elide intermediate stack
between "r" and the global storage area.


  • VM/Machine.cpp: (KJS::Machine::dumpRegisters): Updated this function to match the new register file layout, and added the ability to dump exact identifiers for the different parts of a call frame.


(KJS::Machine::unwindCallFrame): Updated this function to match the new
register file layout.


(KJS::Machine::execute): Updated this function to initialize a call frame
header for global code, and to swap global storage areas when switching
to execution in a new global object.


(KJS::Machine::privateExecute): Got rid of "safeForReentry" and re-reading
of registerBase because the register file is always safe for reentry now,
and registerBase never changes.


  • VM/Machine.h: Moved the call frame header enum from Machine to RegisterFile, to resolve a header dependency problem (a good sign that the enum belonged in RegisterFile all along!)
  • VM/RegisterFile.cpp:
  • VM/RegisterFile.h: Changed RegisterFile to mmap a fixed size register area. This allows us to avoid re-allocting the register file later on. Instead, we rely on the OS to allocate physical pages to the register file as necessary.
  • VM/RegisterFileStack.cpp: Removed. Tada!
  • VM/RegisterFileStack.h: Removed. Tada!
  • kjs/DebuggerCallFrame.cpp: Updated this class to match the new register file layout, greatly simplifying it in the process.
  • kjs/JSActivation.h:
  • kjs/JSActivation.cpp: Moved some of this logic up to JSVariableObject, since the global object now needs to be able to tear off its registers just like the activation object.
  • kjs/JSFunction.cpp: No need to fiddle with the register file anymore.
  • kjs/JSGlobalObject.h:
  • kjs/JSGlobalObject.cpp: Updated JSGlobalObject to support moving its global storage area into and out of the register file.
  • kjs/PropertySlot.cpp: No need to fiddle with the register file anymore.
  • kjs/collector.cpp: Renamed markStackObjectConservatively to markConservatively, since we don't just mark stack objects this way.


Also, added code to mark the machine's register file.

  • kjs/config.h: Moved some platforms #defines from here...
  • wtf/Platform.h: ...to here, to support mmap/VirtualAlloc detection in RegisterFile.h.

LayoutTests:

2008-06-26 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.


Added a test for what happens when a script exceeds the limit on declared
global variables.

  • fast/js/global-var-limit-expected.txt: Added.
  • fast/js/global-var-limit.html: Added.
  • fast/js/global-recursion-on-full-stack-expected.txt: Updated for new (slightly more correct) behavior. Since the stack overflow happens in the middle of a try/catch block, it should be caught, instead of logged to the console.
  • Property svn:eol-style set to native
File size: 12.8 KB
Line 
1_JSCheckScriptSyntax
2_JSClassCreate
3_JSClassRelease
4_JSClassRetain
5_JSContextGetGlobalObject
6_JSEvaluateScript
7_JSGarbageCollect
8_JSGlobalContextCreate
9_JSGlobalContextRelease
10_JSGlobalContextRetain
11_JSObjectCallAsConstructor
12_JSObjectCallAsFunction
13_JSObjectCopyPropertyNames
14_JSObjectDeleteProperty
15_JSObjectGetPrivate
16_JSObjectGetProperty
17_JSObjectGetPropertyAtIndex
18_JSObjectGetPrototype
19_JSObjectHasProperty
20_JSObjectIsConstructor
21_JSObjectIsFunction
22_JSObjectMake
23_JSObjectMakeConstructor
24_JSObjectMakeFunction
25_JSObjectMakeFunctionWithCallback
26_JSObjectSetPrivate
27_JSObjectSetProperty
28_JSObjectSetPropertyAtIndex
29_JSObjectSetPrototype
30_JSPropertyNameAccumulatorAddName
31_JSPropertyNameArrayGetCount
32_JSPropertyNameArrayGetNameAtIndex
33_JSPropertyNameArrayRelease
34_JSPropertyNameArrayRetain
35_JSStringCopyCFString
36_JSStringCreateWithCFString
37_JSStringCreateWithCharacters
38_JSStringCreateWithUTF8CString
39_JSStringGetCharactersPtr
40_JSStringGetLength
41_JSStringGetMaximumUTF8CStringSize
42_JSStringGetUTF8CString
43_JSStringIsEqual
44_JSStringIsEqualToUTF8CString
45_JSStringRelease
46_JSStringRetain
47_JSValueGetType
48_JSValueIsBoolean
49_JSValueIsEqual
50_JSValueIsInstanceOfConstructor
51_JSValueIsNull
52_JSValueIsNumber
53_JSValueIsObject
54_JSValueIsObjectOfClass
55_JSValueIsStrictEqual
56_JSValueIsString
57_JSValueIsUndefined
58_JSValueMakeBoolean
59_JSValueMakeNull
60_JSValueMakeNumber
61_JSValueMakeString
62_JSValueMakeUndefined
63_JSValueProtect
64_JSValueToBoolean
65_JSValueToNumber
66_JSValueToObject
67_JSValueToStringCopy
68_JSValueUnprotect
69_WTFLog
70_WTFLogVerbose
71_WTFReportArgumentAssertionFailure
72_WTFReportAssertionFailure
73_WTFReportAssertionFailureWithMessage
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