From: Serhei Makarov <serhei@serhei.io>
Date: Fri, 19 Jun 2026 20:39:39 +0000 (-0400)
Subject: tests/run-stackprof-system-gprof.sh: check this kind of rewrite
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b91000999b6005ea86ee5b82318e28ed27f06def;p=thirdparty%2Felfutils.git

tests/run-stackprof-system-gprof.sh: check this kind of rewrite
---

diff --git a/tests/run-stackprof-system-gprof.sh b/tests/run-stackprof-system-gprof.sh
index e2765324..19e46d16 100755
--- a/tests/run-stackprof-system-gprof.sh
+++ b/tests/run-stackprof-system-gprof.sh
@@ -16,65 +16,61 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-set -x
+. $srcdir/stackprof-subr.sh
 
-. $srcdir/test-subr.sh
+set -x
+unset VALGRIND_CMD
 
 # prerequisites
 type timeout 2>/dev/null || (echo "no timeout installed"; exit 77)
-expr `whoami` = "root" || (echo "run as root"; exit 77)
+check_perf_event_open || (echo "perf_event_open fails (check kernel.perf_event_paranoid + kernel config)"; exit 77)
+expr `whoami` = "root" || (echo "not running as root"; exit 77)
 
-# run systemwide scan
 tempfiles test.out
-# produce gprof data
-testrun timeout -p -sINT 10 ${abs_top_builddir}/src/stackprof -v -v 2>&1 | tee test.out
+tempfiles gmon.*
 
+# run systemwide scan, no gprof output
+testrun timeout -p -sINT 10 ${abs_top_builddir}/src/stackprof -v 2>&1 | tee test.out
 grep "^perf_event_attr configuration" test.out
 grep "Starting stack profile collection systemwide" test.out
-grep -E "^[0-9]+ " test.out
+grep -E "^[0-9]+ " test.out # -- pid / sample counts entries
 
-# run it again, producing gprof data
-testrun timeout -p -sINT 10 ${abs_top_builddir}/src/stackprof -v -v -g 2>&1 | tee test.out
-tempfiles test.out
-tempfiles gmon.*
-grep "^perf_event_attr configuration type=1 config=0 sample_freq=" test.out
+# run systemwide scan again, with gprof output
+testrun timeout -p -sINT 10 ${abs_top_builddir}/src/stackprof -v -g 2>&1 | tee test.out
+grep "^perf_event_attr configuration" test.out
 grep "Starting stack profile collection systemwide" test.out
 grep -E "^buildid [0-9a-f]+" test.out
 
-export DEBUGINFOD_URLS=https://debuginfod.elfutils.org/
+stackprof_debuginfod_setup
 
 for f in gmon.*.out
 do
     exe="`basename "$f" .out`.exe"
-    if [ ! -f "$exe" ];
-    then
-        echo "NOTE: finding $f executable by buildid"
+    if [ ! -f "$exe" ]; then
         buildid=`echo "$f" | cut -f2 -d.`
-        if testrun ${abs_top_builddir}/debuginfod/debuginfod-find -v executable $buildid; then
-            ln -s "`${abs_top_builddir}/debuginfod/debuginfod-find executable $buildid`" "$exe"
-        else
-            echo "SKIPPING: executable not found"
+        if ! testrun ${abs_top_builddir}/debuginfod/debuginfod-find -v executable $buildid; then
+            echo "$exe not found, skipping"
             continue
         fi
+        ln -s "`${abs_top_builddir}/debuginfod/debuginfod-find executable $buildid`" "$exe"
     fi
+    exe_info="$exe (`readlink $exe`)"
     tempfiles "$exe"
-    echo "NOTE: analyzing $exe `readlink $exe`"
     tempfiles gprof_output.txt
-    # Try a plain gprof attempt on the executable
+    # try a plain gprof run on the executable
     if gprof "$exe" "$f" > gprof_output.txt 2>&1; then
-        # Success, use the output
+        echo "$exe_info"
         cat gprof_output.txt
-    else
-        # Fall back to debuginfod if necessary (e.g., if debug info is missing)
-        echo "NOTE: stripped binary found, attempting to find debuginfo"
-        if testrun ${abs_top_builddir}/debuginfod/debuginfod-find -v debuginfo $exe; then
-            debuginfo="`${abs_top_builddir}/debuginfod/debuginfod-find debuginfo $exe`"
-            gprof "$debuginfo" "$f"
-        else
-            echo "SKIPPING: debuginfo not found"
-            continue
-        fi
+        continue
+    fi
+    # else fall back to debuginfod
+    if ! testrun ${abs_top_builddir}/debuginfod/debuginfod-find -v debuginfo $exe; then
+        echo "$exe_info is a stripped binary, debuginfo not found, skipping"
+        continue
     fi
+    debuginfo="`${abs_top_builddir}/debuginfod/debuginfod-find debuginfo $exe`"
+    echo "$exe_info"
+    gprof "$debuginfo" "$f"
 done
 
 exit 0
diff --git a/tests/stackprof-subr.sh b/tests/stackprof-subr.sh
new file mode 100644
index 00000000..a75a55d9
--- /dev/null
+++ b/tests/stackprof-subr.sh
@@ -0,0 +1,34 @@
+# Copyright (C) 2021 Red Hat, Inc.
+# This file is part of elfutils.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# elfutils is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# sourced from run-stackprof-*.sh tests (must be bash scripts)
+
+. $srcdir/test-subr.sh
+# TODO . $srcdir/debuginfod-subr.sh ??
+
+check_perf_event_open() {
+    tempfiles perf-test.out
+    if ! testrun timeout 2 ${abs_top_builddir}/src/stackprof -v -- /bin/true > perf-test.out 2>&1; then
+        if grep -q "perf_event_open.*failed\|Operation note permitted\|Permission denied"; then
+            exit 77
+        fi
+    fi
+}
+
+stackprof_debuginfod_setup() {
+    # TODO non networked version
+    export DEBUGINFOD_URLS=https://debuginfod.elfutils.org/
+}