Messages in this thread | | | Date | Sun, 27 Mar 2016 13:05:01 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH 3/4] perf, tools, script: Add support for printing assembler |
| |
On Fri, Mar 25, 2016 at 04:02:37PM -0700, Andi Kleen wrote: > From: Andi Kleen <ak@linux.intel.com> > > When dumping PT traces with perf script it is very useful to see the > assembler for each sample, so that it is easily possible to follow > the control flow. > > As using objdump is difficult and inefficient from perf script this > patch uses the udis86 library to implement assembler output. > The library can be downloaded from http://udis86.sourceforge.net/ > > The library is probed as an external dependency in the usual way. Then perf > script calls into it when needed, and handles callbacks to resolve > symbols. > > % perf record -e intel_pt//u true > % perf script -F sym,symoff,ip,asm --itrace=i0ns | head > 7fc7188b4190 _start+0x0 mov %rsp, %rdi > 7fc7188b4193 _start+0x3 call _dl_start > 7fc7188b7710 _dl_start+0x0 push %rbp > 7fc7188b7711 _dl_start+0x1 mov %rsp, %rbp > 7fc7188b7714 _dl_start+0x4 push %r15 > 7fc7188b7716 _dl_start+0x6 push %r14 > 7fc7188b7718 _dl_start+0x8 push %r13 > 7fc7188b771a _dl_start+0xa push %r12 > 7fc7188b771c _dl_start+0xc mov %rdi, %r12 > 7fc7188b771f _dl_start+0xf push %rbx > > Current issues: > - Some jump references do not get resolved to symbols. > - udis86 release does not support STAC/CLAC, which are used in the kernel, > but there is a pending patch for it.
can't apply this on latest Arnaldo's tree:
patching file Documentation/perf-script.txt patching file builtin-script.c Hunk #5 succeeded at 431 (offset -2 lines). Hunk #6 succeeded at 832 with fuzz 2 (offset -10 lines). Hunk #7 FAILED at 871. Hunk #8 succeeded at 890 with fuzz 2 (offset -10 lines). Hunk #9 succeeded at 899 (offset -10 lines). Hunk #10 FAILED at 1018. Hunk #11 succeeded at 2108 (offset -10 lines). 2 out of 11 hunks FAILED -- saving rejects to file builtin-script.c.rej
jirka
| |