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7903a70867
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Sandipan Das 7903a70867 perf script: Show symbol offsets by default 
Since the ip shown for a symbol is now always a virtual address, it
becomes difficult to correlate this with objdump output and determine
the exact instruction address. So, we always show the offset from the
start of the symbol.

This can be verified on a powerpc64le system running Fedora 27 as
follows:

  # perf probe -a sys_write
  # perf record -e probe:sys_write -g ~/test

Before applying this patch:

  # perf script

  test  9710 [013] 95614.332431: probe:sys_write: (c0000000004025b0)
          c0000000004025b0 sys_write (/lib/modules/4.17.0-rc4+/build/vmlinux)
          c00000000000b9e0 system_call (/lib/modules/4.17.0-rc4+/build/vmlinux)
              7fffb70d8234 __GI___libc_write (/usr/lib64/libc-2.26.so)
              7fffb7052c74 _IO_file_write@@GLIBC_2.17 (/usr/lib64/libc-2.26.so)
                  5afc1818 [unknown] ([unknown])
              7fffb7051a60 new_do_write (/usr/lib64/libc-2.26.so)
              7fffb7054638 _IO_do_write@@GLIBC_2.17 (/usr/lib64/libc-2.26.so)
              7fffb7054bbc _IO_file_overflow@@GLIBC_2.17 (/usr/lib64/libc-2.26.so)
              7fffb7055a24 __overflow (/usr/lib64/libc-2.26.so)
              7fffb7044548 _IO_puts (/usr/lib64/libc-2.26.so)
                  10000440 main (/home/sandipan/test)
              7fffb6fe36a0 generic_start_main.isra.0 (/usr/lib64/libc-2.26.so)
              7fffb6fe3898 __libc_start_main (/usr/lib64/libc-2.26.so)
                         0 [unknown] ([unknown])
  ...

After applying this patch:

  # perf script

  test  9710 [013] 95614.332431: probe:sys_write: (c0000000004025b0)
          c0000000004025b0 sys_write+0x10 (/lib/modules/4.17.0-rc4+/build/vmlinux)
          c00000000000b9e0 system_call+0x58 (/lib/modules/4.17.0-rc4+/build/vmlinux)
              7fffb70d8234 __GI___libc_write+0x24 (/usr/lib64/libc-2.26.so)
              7fffb7052c74 _IO_file_write@@GLIBC_2.17+0x44 (/usr/lib64/libc-2.26.so)
                  5afc1818 [unknown] ([unknown])
              7fffb7051a60 new_do_write+0x90 (/usr/lib64/libc-2.26.so)
              7fffb7054638 _IO_do_write@@GLIBC_2.17+0x38 (/usr/lib64/libc-2.26.so)
              7fffb7054bbc _IO_file_overflow@@GLIBC_2.17+0x14c (/usr/lib64/libc-2.26.so)
              7fffb7055a24 __overflow+0x64 (/usr/lib64/libc-2.26.so)
              7fffb7044548 _IO_puts+0x218 (/usr/lib64/libc-2.26.so)
                  10000440 main+0x20 (/home/sandipan/test)
              7fffb6fe36a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so)
              7fffb6fe3898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so)
                         0 [unknown] ([unknown])
  ...

Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: http://lkml.kernel.org/r/20180517063326.6319-2-sandipan@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-05-18 16:31:40 -03:00
..
accounting
arch tools headers kvm: Sync ARM UAPI headers with the kernel sources 2018-05-07 15:23:46 -03:00
bpf bpf: fix uninitialized variable in bpf tools 2018-04-26 22:23:02 +02:00
build Kbuild: fix # escaping in .cmd files for future Make 2018-04-11 00:03:02 +09:00
cgroup tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
firewire
gpio Linux 4.16-rc5 2018-03-18 17:48:59 +01:00
hv tools: hv: include string.h in hv_fcopy_daemon 2018-03-06 09:57:16 -08:00
iio tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
include tools include compiler-gcc: Add __pure attribute helper 2018-05-17 15:17:21 -03:00
kvm/kvm_stat tools/kvm_stat: Remove unused function 2018-03-28 22:47:06 +02:00
laptop tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
leds tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
lib tools lib api fs tracing_path: Make tracing_events_path private 2018-05-17 14:51:23 -03:00
memory-model tools/memory-model: Finish the removal of rb-dep, smp_read_barrier_depends(), and lockless_dereference() 2018-03-10 10:22:23 +01:00
nfsd
objtool objtool: Support HOSTCFLAGS and HOSTLDFLAGS 2018-04-17 07:59:42 +02:00
pci
pcmcia
perf perf script: Show symbol offsets by default 2018-05-18 16:31:40 -03:00
power tools: power/acpi, revert to LD = gcc 2018-05-04 11:24:22 +02:00
scripts Kbuild: fix # escaping in .cmd files for future Make 2018-04-11 00:03:02 +09:00
spi tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
testing tc-testing: fix tdc tests for 'bpf' action 2018-05-10 17:28:02 -04:00
thermal/tmon tools/thermal: tmon: fix for segfault 2018-03-27 09:51:23 +02:00
time
usb usbip: tools: usbipd: exclude exported devices from exportable device list 2018-03-22 13:08:20 +01:00
virtio ptr_ring: fix build 2018-03-20 03:17:37 +02:00
vm tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
wmi tools: fix cross-compile var clobbering 2018-02-21 15:35:42 -08:00
Makefile