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[PATCHv2,bpf-next] selftests/bpf: Fix uprobe consumer test (again)

Message ID 20241107094337.3848210-1-jolsa@kernel.org (mailing list archive)
State Accepted
Commit 2ed7316a506cadea56c2b954f2c85e1b308b6e12
Delegated to: BPF
Headers show
Series [PATCHv2,bpf-next] selftests/bpf: Fix uprobe consumer test (again) | expand

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netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5 this patch: 5
netdev/build_tools success Errors and warnings before: 0 (+0) this patch: 0 (+0)
netdev/cc_maintainers warning 8 maintainers not CCed: kpsingh@kernel.org martin.lau@linux.dev eddyz87@gmail.com shuah@kernel.org linux-kselftest@vger.kernel.org song@kernel.org mykolal@fb.com yonghong.song@linux.dev
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
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Commit Message

Jiri Olsa Nov. 7, 2024, 9:43 a.m. UTC 
The new uprobe changes bring bit some new behaviour that we need
to reflect in the consumer test.

The idea being that uretprobe under test either stayed from before to
after (uret_stays + test_bit) or uretprobe instance survived and we
have uretprobe active in after (uret_survives + test_bit).

uret_survives just states that uretprobe survives if there are *any*
uretprobes both before and after (overlapping or not, doesn't matter)
and uprobe was attached before.

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 .../selftests/bpf/prog_tests/uprobe_multi_test.c   | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Nov. 7, 2024, 4:10 p.m. UTC | #1 
Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Thu,  7 Nov 2024 10:43:37 +0100 you wrote:
> The new uprobe changes bring bit some new behaviour that we need
> to reflect in the consumer test.
> 
> The idea being that uretprobe under test either stayed from before to
> after (uret_stays + test_bit) or uretprobe instance survived and we
> have uretprobe active in after (uret_survives + test_bit).
> 
> [...]

Here is the summary with links:
  - [PATCHv2,bpf-next] selftests/bpf: Fix uprobe consumer test (again)
    https://git.kernel.org/bpf/bpf-next/c/2ed7316a506c

You are awesome, thank you!
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
index 619b31cd24a1..616441fdd7f2 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
@@ -869,15 +869,17 @@  static int consumer_test(struct uprobe_multi_consumers *skel,
 			fmt = "prog 0/1: uprobe";
 		} else {
 			/*
-			 * to trigger uretprobe consumer, the uretprobe needs to be installed,
-			 * which means one of the 'return' uprobes was alive when probe was hit:
-			 *
-			 *   idxs: 2/3 uprobe return in 'installed' mask
+			 * To trigger uretprobe consumer, the uretprobe under test either stayed from
+			 * before to after (uret_stays + test_bit) or uretprobe instance survived and
+			 * we have uretprobe active in after (uret_survives + test_bit)
 			 */
-			unsigned long had_uretprobes  = before & 0b1100; /* is uretprobe installed */
 
-			if (had_uretprobes && test_bit(idx, after))
+			bool uret_stays = before & after & 0b1100;
+			bool uret_survives = (before & 0b1100) && (after & 0b1100) && (before & 0b0011);
+
+			if ((uret_stays || uret_survives) && test_bit(idx, after))
 				val++;
+
 			fmt = "idx 2/3: uretprobe";
 		}