Thank Jochen, but I don't clearly understand how to set breakpoint on JS function? I can set breakpoints only on c++ functions in gdb.
On Wednesday, February 17, 2016 at 2:07:04 PM UTC+6, Jochen Eisinger wrote: > > V8 will move code objects around during garbage collection. If you want to > debug code in code objects, you'll have an easier time if you disable this > by passing --nocompact_code_space. > > Otherwise, using the regular commands to set breakpoints in gdb should > work just fine. > > On Wed, Feb 17, 2016 at 8:55 AM <[email protected] <javascript:>> wrote: > >> Hi v8 community! >> >> I have a js function: >> >> function foo(o) { >> return o.x; >> } >> >> >> print(foo(37)); >> >> >> I can see asm code for this function via "--print-code" flag, >> but I want to set a breakpoint at this function and see asm code in my >> gdb. >> >> For example: >> >> If I see this code in logs: >> 0x1ec9f1e3eeb8 24 488bd0 REX.W movq rdx,rax >> 0x1ec9f1e3eebb 27 48b959bb34fb37140000 REX.W movq rcx,0x1437fb34bb59 >> ;; debug: position 27 >> ;; object: >> 0x1437fb34bb59 <String[1]: x> >> 0x1ec9f1e3eec5 37 48b80000000001000000 REX.W movq rax,0x100000000 >> 0x1ec9f1e3eecf 47 e8cc92fdff call 0x1ec9f1e181a0 ;; code: >> contextual, LOAD_IC, GENERIC >> ] >> [ Return sequence >> 0x1ec9f1e3eed4 52 48bb91d03dfb37140000 REX.W movq rbx,0x1437fb3dd091 >> ;; object: 0x1437fb3dd091 Cell for 6144 >> >> In runtime I want to jump into 0x1ec9f1e181a0 and see what is happening >> there. >> >> How can I do this? >> >> -- >> -- >> v8-dev mailing list >> [email protected] <javascript:> >> http://groups.google.com/group/v8-dev >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
