gdblog

(gdb) b *0x1fafde147e00
Breakpoint 2 at 0x1fafde147e00
(gdb) cont
Continuing.

Thread 1 "d8" hit Breakpoint 2, 0x00001fafde147e00 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e00 <LazyCompile:*myfunc test.js:144+0>:  48 8d 1d f9 ff ff ff    lea    -0x7(%rip),%rbx        # 0x1fafde147e00 <LazyCompile:*myfunc test.js:144>
(gdb) i r rbx rcx
rbx            0x5      5
rcx            0x1fafde147e00   34840205622784
(gdb) stepi
0x00001fafde147e07 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e07 <LazyCompile:*myfunc test.js:144+7>:  48 3b d9        cmp    %rcx,%rbx
(gdb)
0x00001fafde147e0a in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e0a <LazyCompile:*myfunc test.js:144+10>: 74 18   je     0x1fafde147e24 <LazyCompile:*myfunc test.js:144+36>
(gdb)
0x00001fafde147e0c in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e0c <LazyCompile:*myfunc test.js:144+12>: 48 ba 00 00 00 00 36 00 00 00   movabs $0x3600000000,%rdx
(gdb)

Thread 1 "d8" hit Breakpoint 1, 0x00001fafde147e16 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e16 <LazyCompile:*myfunc test.js:144+22>: 49 ba 40 22 c4 b5 31 7f 00 00   movabs $0x7f31b5c42240,%r10
(gdb) stepi
0x00001fafde147e20 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e20 <LazyCompile:*myfunc test.js:144+32>: 41 ff d2        callq  *%r10
(gdb) stepi
0x00007f31b5c42240 in Builtins_Abort () from /home/jnes/misc/chromium/src/out/x64.debug/./libv8.so
=> 0x00007f31b5c42240 <Builtins_Abort+0>:       55      push   %rbp
(gdb) i r rbx rcx
rbx            0x1fafde147e00   34840205622784
rcx            0x1fafde147e07   34840205622791
(gdb) set $rip=0x1fafde147e00
(gdb) x/i $rip
=> 0x1fafde147e00 <LazyCompile:*myfunc test.js:144>:
    lea    -0x7(%rip),%rbx        # 0x1fafde147e00 <LazyCompile:*myfunc test.js:144>
(gdb) stepi
0x00001fafde147e07 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e07 <LazyCompile:*myfunc test.js:144+7>:  48 3b d9        cmp    %rcx,%rbx
(gdb) i r rbx
rbx            0x1fafde147e00   34840205622784
(gdb) stepi
0x00001fafde147e0a in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e0a <LazyCompile:*myfunc test.js:144+10>: 74 18   je     0x1fafde147e24 <LazyCompile:*myfunc test.js:144+36>
(gdb)
0x00001fafde147e0c in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e0c <LazyCompile:*myfunc test.js:144+12>: 48 ba 00 00 00 00 36 00 00 00   movabs $0x3600000000,%rdx
(gdb)

Thread 1 "d8" hit Breakpoint 1, 0x00001fafde147e16 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e16 <LazyCompile:*myfunc test.js:144+22>: 49 ba 40 22 c4 b5 31 7f 00 00   movabs $0x7f31b5c42240,%r10
(gdb)
0x00001fafde147e20 in LazyCompile:*myfunc test.js:144 ()
=> 0x00001fafde147e20 <LazyCompile:*myfunc test.js:144+32>: 41 ff d2        callq  *%r10
(gdb) i r rbx rcx
rbx            0x1fafde147e00   34840205622784
rcx            0x1fafde147e07   34840205622791