Could not use "record btrace" even if I have Intel PT hardware feature

慕冬亮
2016-09-06T14:37:15Z

Dear all,

I encounter one problem when I try to leverage Intel PT to do branch tracing.

My cpu has Intel PT feature via "grep intel_pt /proc/cpuinfo".

$ grep intel_pt /proc/cpuinfo

flags : ...intel_pt...

$ gdb simple
.......
(gdb) b main
Breakpoint 1 at 0x40050c
(gdb) r
Starting program: .../Work/Projects/simple

Breakpoint 1, 0x000000000040050c in main ()
(gdb) record btrace
Target does not support branch tracing.
(gdb) record btrace pt
GDB does not support Intel Processor Trace.

--
My best regards to you.

No System Is Safe!
Dongliang Mu