tools/perf/tests/shell/test_uprobe_from_different_cu.sh

   1 #!/bin/bash
   2 # test perf probe of function from different CU
   3 # SPDX-License-Identifier: GPL-2.0
   4
   5 set -e
   6
   7 # Skip if there's no probe command.
   8 if ! perf | grep probe
   9 then
  10         echo "Skip: probe command isn't present"
  11         exit 2
  12 fi
  13
  14 # skip if there's no gcc
  15 if ! [ -x "$(command -v gcc)" ]; then
  16         echo "failed: no gcc compiler"
  17         exit 2
  18 fi
  19
  20 temp_dir=$(mktemp -d /tmp/perf-uprobe-different-cu-sh.XXXXXXXXXX)
  21
  22 cleanup()
  23 {
  24         trap - EXIT TERM INT
  25         if [[ "${temp_dir}" =~ ^/tmp/perf-uprobe-different-cu-sh.*$ ]]; then
  26                 echo "--- Cleaning up ---"
  27                 perf probe -x ${temp_dir}/testfile -d foo || true
  28                 rm -f "${temp_dir}/"*
  29                 rmdir "${temp_dir}"
  30         fi
  31 }
  32
  33 trap_cleanup()
  34 {
  35         cleanup
  36         exit 1
  37 }
  38
  39 trap trap_cleanup EXIT TERM INT
  40
  41 cat > ${temp_dir}/testfile-foo.h << EOF
  42 struct t
  43 {
  44   int *p;
  45   int c;
  46 };
  47
  48 extern int foo (int i, struct t *t);
  49 EOF
  50
  51 cat > ${temp_dir}/testfile-foo.c << EOF
  52 #include "testfile-foo.h"
  53
  54 int
  55 foo (int i, struct t *t)
  56 {
  57   int j, res = 0;
  58   for (j = 0; j < i && j < t->c; j++)
  59     res += t->p[j];
  60
  61   return res;
  62 }
  63 EOF
  64
  65 cat > ${temp_dir}/testfile-main.c << EOF
  66 #include "testfile-foo.h"
  67
  68 static struct t g;
  69
  70 int
  71 main (int argc, char **argv)
  72 {
  73   int i;
  74   int j[argc];
  75   g.c = argc;
  76   g.p = j;
  77   for (i = 0; i < argc; i++)
  78     j[i] = (int) argv[i][0];
  79   return foo (3, &g);
  80 }
  81 EOF
  82
  83 gcc -g -Og -flto -c ${temp_dir}/testfile-foo.c -o ${temp_dir}/testfile-foo.o
  84 gcc -g -Og -c ${temp_dir}/testfile-main.c -o ${temp_dir}/testfile-main.o
  85 gcc -g -Og -o ${temp_dir}/testfile ${temp_dir}/testfile-foo.o ${temp_dir}/testfile-main.o
  86
  87 perf probe -x ${temp_dir}/testfile --funcs foo | grep "foo"
  88 perf probe -x ${temp_dir}/testfile foo
  89
  90 cleanup