Thanks soren for the Tip. This is what has worked so far (it prints
all Handles i.e. Handle<v8::String>, Handle<v8::internal::String>..)
remove static qualifier from PrintLn in debug.cc (otherwise macros
dont recognize the function)
void PrintLn(v8::Local<v8::Value> value) {
Add following to .gdbinit:
define ps
print v8::internal::PrintLn($arg0)
end
(A simpler way would be to call $arg0.SourcePrint(), but that doesnt
work on derived objects
>> Error - Couldn't find method v8::Handle<v8::String>::SourcePrint
Its possible that GDB macros dont understand how to call virtual functions..
)
-------------Output
Breakpoint 1, ExecuteString (source={val_ = 0xa2fd6e4}, name={val_ =
0xa2fd6e0}, print_result=false, report_exceptions=true) at
samples/shell.cc:244
244 v8::HandleScope handle_scope;
(gdb) ps source
function f(){print("hello");}
f();
$1 = void
Breakpoint 2, v8::internal::Compiler::Compile (source={location_ =
0xa2fd6e4}, script_name={location_ = 0xa2fd6e0}, line_offset=0,
column_offset=0, extension=0x0, input_pre_data=0x0, script_data=
{location_ = 0x0}, natives=v8::internal::NOT_NATIVES_CODE) at
src/compiler.cc:289
289 int source_length = source->length();
(gdb) ps source
function f(){print("hello");}
f();
$2 = void
(gdb) ps script_name
test.js
2010/6/11 Søren Gjesse <[email protected]>:
> One option is to call one of the ShortPrint, Print or PrintLn methods on
> them (Print and PrintLn are only available in debug mode). That will print
> their content to stdout. Note that this applies to the internal object
> types, e.g the String* in source.val_ not source itself.
> Regards,
> Søren
> On Fri, Jun 11, 2010 at 04:57, Vitali Lovich <[email protected]> wrote:
>>
>> Hey, I'm trying to hack on v8 & I'm trying to figure out how to examine
>> the v8 variables.
>> For example, I'm trying to figure out some string parameters that are
>> passed to compile but they all come up as opaque types & I'm not sure how to
>> retrieve the data from them.
>> (gdb) p source.val_
>> $5 = (v8::String *) 0x8352fb4
>> (gdb) p *(source.val_)
>> $6 = {<v8::Primitive> = {<v8::Value> = {<v8::Data> = {<No data fields>},
>> <No data fields>}, <No data fields>}, <No data fields>}
>> Thanks,
>> Vitali
>>
>> --
>> v8-users mailing list
>> [email protected]
>> http://groups.google.com/group/v8-users
>
> --
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> http://groups.google.com/group/v8-users
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