Hi, I used gdb with the gdbinit script provided by V8. So I used the command called "jco" with an argument of a JIT code address. So I have two questions listed below:
1) what is the header of each JIT code function? 2) where is the RelocInfo located for each JIT code function? For 1), I find that before the real code content, there is data structure in size of 0x60 bytes as I use gdb command to see: 0x2d88b5f04300: 0x00000ccaef902889 0x00002a97d2182a09 0x2d88b5f04310: 0x00002a97d2182241 0x00002a97d2182241 0x2d88b5f04320: 0x00002a97d2182619 0x0000080400000000 0x2d88b5f04330: 0x00002a97d21822d1 0x0000000600000147 0x2d88b5f04340: 0x0000000100000000 0xffffffffffffffff 0x2d88b5f04350: 0xffffffff00000000 0x0000000000000000 Looks like the above byte pattern already exist prior to each code chunk. 0x2d88b5f04301: [Code] kind = STUB major_key = CEntryStub compiler = unknown Instructions (size = 327) 0x2d88b5f04360 0 55 push rbp 0x2d88b5f04361 1 4889e5 REX.W movq rbp,rsp 0x2d88b5f04364 4 6a06 push 0x6 0x2d88b5f04366 6 6a00 push 0x0 0x2d88b5f04368 8 49ba0143f0b5882d0000 REX.W movq r10,0x2d88b5f04301 ;; object: 0x2d88b5f04301 <Code STUB> 0x2d88b5f04372 12 4152 push r10 ...... RelocInfo (size = 29) 0x2d88b5f0436a embedded object (0x2d88b5f04301 <Code STUB>) 0x2d88b5f04379 external reference (Isolate::c_entry_fp_address) (0x42a21a8) 0x2d88b5f04386 external reference (Isolate::context_address) (0x42a2138) 0x2d88b5f04393 external reference (Isolate::c_function_address) (0x42a21b8) ...... For 2), looks like the above info does not exist in JIT code page. Thanks. -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
