I imagine you would need $arg0->SourcePrint() instead - otherwise, since
Handle is an actual C++ class, it'll try to find SourcePrint in Handle
instead of in String.
Thanks for the tips - hopefully this'll really help me analyze some stuff
:).
-Vitali
On Fri, Jun 11, 2010 at 12:55 AM, zaheer ahmad <zaheer....@gmail.com> wrote:
> Thanks soren for the Tip. This is what has worked so far (it prints
> all Handles i.e. Handle<v8::String>, Handle<v8::internal::String>..)
>
> remove static qualifier from PrintLn in debug.cc (otherwise macros
> dont recognize the function)
> void PrintLn(v8::Local<v8::Value> value) {
>
> Add following to .gdbinit:
> define ps
> print v8::internal::PrintLn($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 <sgje...@chromium.org>:
> > 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 <vlov...@gmail.com> 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
> >> v8-users@googlegroups.com
> >> http://groups.google.com/group/v8-users
> >
> > --
> > v8-users mailing list
> > v8-users@googlegroups.com
> > http://groups.google.com/group/v8-users
>
> --
> v8-users mailing list
> v8-users@googlegroups.com
> http://groups.google.com/group/v8-users
>
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