From: Anubhav Shelat Date: Fri, 31 Jan 2025 14:57:05 +0000 (-0500) Subject: perf script: force stdin for flamegraph in live mode X-Git-Tag: v6.15-rc1~92^2~222 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=23e0a63c6dd3f69cb7ee18411e5f6857cca55b30;p=thirdparty%2Flinux.git perf script: force stdin for flamegraph in live mode Currently, running "perf script flamegraph -a -F 99 sleep 1" should produce flamegraph.html containing the flamegraph. Howevever, it gives a segmentation fault. This is caused because the flamegraph.py script is supposed to take as input the output of "perf record", which should be in stdin. This would require passing "-i -" to flamegraph.py. However, the "flamegraph-report" script causes "perf script" command to take the "-i -" option instead of flamegraph.py, which causes no problem for "perf script", but causes a seg fault since flamegraph.py has no input file. To fix this I added the "-i -" option directly to the flamegraph-report script to ensure flamegraph.py gets input from stdin. Signed-off-by: Anubhav Shelat Tested-by: Michael Petlan Link: https://lore.kernel.org/r/20250131145704.3164542-2-ashelat@redhat.com Signed-off-by: Namhyung Kim --- diff --git a/tools/perf/scripts/python/bin/flamegraph-report b/tools/perf/scripts/python/bin/flamegraph-report index 53c5dc90c87e9..83d5738c75ca4 100755 --- a/tools/perf/scripts/python/bin/flamegraph-report +++ b/tools/perf/scripts/python/bin/flamegraph-report @@ -1,3 +1,3 @@ #!/bin/bash # description: create flame graphs -perf script -s "$PERF_EXEC_PATH"/scripts/python/flamegraph.py -- "$@" +perf script -s "$PERF_EXEC_PATH"/scripts/python/flamegraph.py -i - -- "$@"