I'm using 3.24.
I create a FunctionTemplate with my own callback function for toString:
v8::Local<v8::FunctionTemplate> result =
v8::FunctionTemplate::New(isolate,valueCstor);
result->SetClassName(className);
result->InstanceTemplate()->SetInternalFieldCount(VALUE_TEMP_ID_COUNT);
* result->PrototypeTemplate()->Set(*
* v8::String::NewFromUtf8(isolate, "toString"),*
* v8::FunctionTemplate::New(isolate, valueToString));*
Everything works fine with functions created through the above, except when
I try to get the prototype of it:
var v = new Value();
v.__proto__;
Removing the highlighted lines fixes the issue.
Here's the stack:
Stacktrace (dead0000-dead0001) 0x3cc891104221 0x3cc891104149:
==== JS stack trace =========================================
Security context: 0x1fa4ac285451 <JS Object>#0#
1: DefaultNumber [native runtime.js:381] (this=0x1fa4ac263541 <JS
Object>#1#,a=0x3cc891104221 <Map(elements=0)>#2#)
2: ToNumber(aka ToNumber) [native runtime.js:317] (this=0x1fa4ac204121
<undefined>,a=0x3cc891104221 <Map(elements=0)>#2#)
3: ToInteger [native runtime.js:357] (this=0x1fa4ac285561 <JS Global
Object>#3#,a=0x3cc891104221 <Map(elements=0)>#2#)
7: DefaultString [native runtime.js:396] (this=0x1fa4ac263541 <JS
Object>#1#,a=0xb357401bcf9 <JS Object>#4#)
8: ToString [native runtime.js:334] (this=0x1fa4ac285561 <JS Global
Object>#3#,a=0xb357401bcf9 <JS Object>#4#)
==== Details ================================================
[1]: DefaultNumber [native runtime.js:381] (this=0x1fa4ac263541 <JS
Object>#1#,a=0x3cc891104221 <Map(elements=0)>#2#) {
// stack-allocated locals
var b = 0x1fa4ac204121 <undefined>
var c = 0x1fa4ac204121 <undefined>
var d = 0x1fa4ac204121 <undefined>
var e = 0x1fa4ac204121 <undefined>
// expression stack (top to bottom)
[05] : 0x8824290ee39 <String[7]: valueOf>
[04] : 0x3cc891104221 <Map(elements=0)>#2#
--------- s o u r c e c o d e ---------
function DefaultNumber(a){?var
b=a.valueOf;?if((%_ClassOf(b)==='Function')){?var
c=%_CallFunction(a,b);?if(%IsPrimitive(c))return c;?}?var
d=a.toString;?if((%_ClassOf(d)==='Function')){?var
e=%_CallFunction(a,d);?if(%IsPrimitive(e))return e;?}?throw
%MakeTypeError('cannot_convert_to_primitive',[]);?}
-----------------------------------------
}
[2]: ToNumber(aka ToNumber) [native runtime.js:317] (this=0x1fa4ac204121
<undefined>,a=0x3cc891104221 <Map(elements=0)>#2#) {
// expression stack (top to bottom)
[04] : 0x3cc891104221 <Map(elements=0)>#2#
[03] : 0x1fa4ac263541 <JS Object>#1#
[02] : 0x1fa4ac282c49 <JS Function DefaultNumber (SharedFunctionInfo
0x1fa4ac21f9c1)>#5#
[01] : 0x1fa4ac204121 <undefined>
[00] : 0x1fa4ac273191 <JS Function ToNumber (SharedFunctionInfo
0x1fa4ac21f161)>#6#
--------- s o u r c e c o d e ---------
function ToNumber(a){?if((typeof(a)==='number'))return
a;?if((typeof(a)==='string')){?return
%_HasCachedArrayIndex(a)?%_GetCachedArrayIndex(a)?:%StringToNumber(a);?}?if((typeof(a)==='boolean'))return
a?1:0;?if((typeof(a)==='undefined'))return
$NaN;?if((typeof(a)==='symbol'))return
$NaN;?return((a===null))?0:ToNumber...
-----------------------------------------
}
[3]: ToInteger [native runtime.js:357] (this=0x1fa4ac285561 <JS Global
Object>#3#,a=0x3cc891104221 <Map(elements=0)>#2#) {
// expression stack (top to bottom)
[02] : 0x3cc891104221 <Map(elements=0)>#2#
[01] : 0x1fa4ac204121 <undefined>
[00] : 0x1fa4ac273191 <JS Function ToNumber (SharedFunctionInfo
0x1fa4ac21f161)>#6#
--------- s o u r c e c o d e ---------
function ToInteger(a){?if(%_IsSmi(a))return a;?return
%NumberToInteger(ToNumber(a));?}
-----------------------------------------
}
[7]: DefaultString [native runtime.js:396] (this=0x1fa4ac263541 <JS
Object>#1#,a=0xb357401bcf9 <JS Object>#4#) {
// stack-allocated locals
var b = 0x1fa4ac287621 <JS Function toString (SharedFunctionInfo
0x1fa4ac287591)>#7#
var c = 0x1fa4ac204121 <undefined>
var d = 0x1fa4ac204121 <undefined>
var e = 0x1fa4ac204121 <undefined>
// expression stack (top to bottom)
[05] : 0x1fa4ac287621 <JS Function toString (SharedFunctionInfo
0x1fa4ac287591)>#7#
[04] : 0xb357401bcf9 <JS Object>#4#
--------- s o u r c e c o d e ---------
function DefaultString(a){?var
b=a.toString;?if((%_ClassOf(b)==='Function')){?var
c=%_CallFunction(a,b);?if(%IsPrimitive(c))return c;?}?var
d=a.valueOf;?if((%_ClassOf(d)==='Function')){?var
e=%_CallFunction(a,d);?if(%IsPrimitive(e))return e;?}?throw
%MakeTypeError('cannot_convert_to_primitive',[]);?}
-----------------------------------------
}
[8]: ToString [native runtime.js:334] (this=0x1fa4ac285561 <JS Global
Object>#3#,a=0xb357401bcf9 <JS Object>#4#) {
// expression stack (top to bottom)
[04] : 0xb357401bcf9 <JS Object>#4#
[03] : 0x1fa4ac263541 <JS Object>#1#
[02] : 0x1fa4ac279a39 <JS Function DefaultString (SharedFunctionInfo
0x1fa4ac21fa51)>#8#
[01] : 0x1fa4ac263541 <JS Object>#1#
[00] : 0x1fa4ac26db11 <JS Function ToString (SharedFunctionInfo
0x1fa4ac21f2d9)>#9#
--------- s o u r c e c o d e ---------
function ToString(a){?if((typeof(a)==='string'))return
a;?if((typeof(a)==='number'))return
%_NumberToString(a);?if((typeof(a)==='boolean'))return
a?'true':'false';?if((typeof(a)==='undefined'))return'undefined';?return((a===null))?'null':%ToString(%DefaultString(a));?}
-----------------------------------------
}
==== Key ============================================
#0# 0x1fa4ac285451: 0x1fa4ac285451 <JS Object>
#1# 0x1fa4ac263541: 0x1fa4ac263541 <JS Object>
#2# 0x3cc891104221: 0x3cc891104221 <Map(elements=0)>
#3# 0x1fa4ac285561: 0x1fa4ac285561 <JS Global Object>
#4# 0xb357401bcf9: 0xb357401bcf9 <JS Object>
#5# 0x1fa4ac282c49: 0x1fa4ac282c49 <JS Function DefaultNumber
(SharedFunctionInfo 0x1fa4ac21f9c1)>
#6# 0x1fa4ac273191: 0x1fa4ac273191 <JS Function ToNumber
(SharedFunctionInfo 0x1fa4ac21f161)>
#7# 0x1fa4ac287621: 0x1fa4ac287621 <JS Function toString
(SharedFunctionInfo 0x1fa4ac287591)>
#8# 0x1fa4ac279a39: 0x1fa4ac279a39 <JS Function DefaultString
(SharedFunctionInfo 0x1fa4ac21fa51)>
#9# 0x1fa4ac26db11: 0x1fa4ac26db11 <JS Function ToString
(SharedFunctionInfo 0x1fa4ac21f2d9)>
=====================
Questions: Is this a bug or am I doing something wrong? Anyway I can work
around it?
Thanks,
Jane
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