Adding uprobe session consumers to the consumer test, so we get the session into the test mix.
Signed-off-by: Jiri Olsa <[email protected]> --- .../bpf/prog_tests/uprobe_multi_test.c | 63 ++++++++++++++----- .../bpf/progs/uprobe_multi_consumers.c | 16 ++++- 2 files changed, 64 insertions(+), 15 deletions(-) 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 7e0228f8fcfc..b43107e87e78 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c @@ -765,6 +765,10 @@ get_program(struct uprobe_multi_consumers *skel, int prog) return skel->progs.uprobe_2; case 3: return skel->progs.uprobe_3; + case 4: + return skel->progs.uprobe_4; + case 5: + return skel->progs.uprobe_5; default: ASSERT_FAIL("get_program"); return NULL; @@ -783,6 +787,10 @@ get_link(struct uprobe_multi_consumers *skel, int link) return &skel->links.uprobe_2; case 3: return &skel->links.uprobe_3; + case 4: + return &skel->links.uprobe_4; + case 5: + return &skel->links.uprobe_5; default: ASSERT_FAIL("get_link"); return NULL; @@ -801,8 +809,10 @@ static int uprobe_attach(struct uprobe_multi_consumers *skel, int idx) /* * bit/prog: 0,1 uprobe entry * bit/prog: 2,3 uprobe return + * bit/prog: 4,5 uprobe session */ opts.retprobe = idx == 2 || idx == 3; + opts.session = idx == 4 || idx == 5; *link = bpf_program__attach_uprobe_multi(prog, 0, "/proc/self/exe", "uprobe_consumer_test", @@ -832,13 +842,13 @@ uprobe_consumer_test(struct uprobe_multi_consumers *skel, int idx; /* detach uprobe for each unset programs in 'before' state ... */ - for (idx = 0; idx < 4; idx++) { + for (idx = 0; idx < 6; idx++) { if (test_bit(idx, before) && !test_bit(idx, after)) uprobe_detach(skel, idx); } /* ... and attach all new programs in 'after' state */ - for (idx = 0; idx < 4; idx++) { + for (idx = 0; idx < 6; idx++) { if (!test_bit(idx, before) && test_bit(idx, after)) { if (!ASSERT_OK(uprobe_attach(skel, idx), "uprobe_attach_after")) return -1; @@ -855,7 +865,7 @@ static int consumer_test(struct uprobe_multi_consumers *skel, printf("consumer_test before %lu after %lu\n", before, after); /* 'before' is each, we attach uprobe for every set idx */ - for (idx = 0; idx < 4; idx++) { + for (idx = 0; idx < 6; idx++) { if (test_bit(idx, before)) { if (!ASSERT_OK(uprobe_attach(skel, idx), "uprobe_attach_before")) goto cleanup; @@ -866,7 +876,7 @@ static int consumer_test(struct uprobe_multi_consumers *skel, if (!ASSERT_EQ(err, 0, "uprobe_consumer_test")) goto cleanup; - for (idx = 0; idx < 4; idx++) { + for (idx = 0; idx < 6; idx++) { const char *fmt = "BUG"; __u64 val = 0; @@ -878,18 +888,38 @@ static int consumer_test(struct uprobe_multi_consumers *skel, if (test_bit(idx, before)) val++; fmt = "prog 0/1: uprobe"; - } else { + } else if (idx < 4) { /* * 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 + * idxs: 2/3/4 uprobe return in 'installed' mask */ - unsigned long had_uretprobes = before & 0b1100; /* is uretprobe installed */ + unsigned long had_uretprobes = before & 0b011100; /* is uretprobe installed */ if (had_uretprobes && test_bit(idx, after)) val++; fmt = "idx 2/3: uretprobe"; + } else if (idx == 4) { + /* + * session with return + * +1 if defined in 'before' + * +1 if defined in 'after' + */ + if (test_bit(idx, before)) { + val++; + if (test_bit(idx, after)) + val++; + } + fmt = "idx 4 : session with return"; + } else if (idx == 5) { + /* + * session without return + * +1 if defined in 'before' + */ + if (test_bit(idx, before)) + val++; + fmt = "idx 5 : session with NO return"; } if (!ASSERT_EQ(skel->bss->uprobe_result[idx], val, fmt)) @@ -900,7 +930,7 @@ static int consumer_test(struct uprobe_multi_consumers *skel, ret = 0; cleanup: - for (idx = 0; idx < 4; idx++) + for (idx = 0; idx < 6; idx++) uprobe_detach(skel, idx); return ret; } @@ -920,40 +950,45 @@ static void test_consumers(void) * * - 2 uprobe entry consumer * - 2 uprobe exit consumers + * - 2 uprobe session consumers * - * The test uses 4 uprobes attached on single function, but that - * translates into single uprobe with 4 consumers in kernel. + * The test uses 6 uprobes attached on single function, but that + * translates into single uprobe with 6 consumers in kernel. * * The before/after values present the state of attached consumers * before and after the probed function: * * bit/prog 0,1 : uprobe entry * bit/prog 2,3 : uprobe return + * bit/prog 4 : uprobe session with return + * bit/prog 5 : uprobe session without return * * For example for: * - * before = 0b0101 - * after = 0b0110 + * before = 0b010101 + * after = 0b000110 * * it means that before we call 'uprobe_consumer_test' we attach * uprobes defined in 'before' value: * * - bit/prog 0: uprobe entry * - bit/prog 2: uprobe return + * - bit/prog 4: uprobe session with return * * uprobe_consumer_test is called and inside it we attach and detach * uprobes based on 'after' value: * * - bit/prog 0: stays untouched * - bit/prog 2: uprobe return is detached + * - bit/prog 4: uprobe session is detached * * uprobe_consumer_test returns and we check counters values increased * by bpf programs on each uprobe to match the expected count based on * before/after bits. */ - for (before = 0; before < 16; before++) { - for (after = 0; after < 16; after++) + for (before = 0; before < 64; before++) { + for (after = 0; after < 64; after++) if (consumer_test(skel, before, after)) goto out; } diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_consumers.c b/tools/testing/selftests/bpf/progs/uprobe_multi_consumers.c index 7e0fdcbbd242..448b753a4c66 100644 --- a/tools/testing/selftests/bpf/progs/uprobe_multi_consumers.c +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_consumers.c @@ -8,7 +8,7 @@ char _license[] SEC("license") = "GPL"; -__u64 uprobe_result[4]; +__u64 uprobe_result[6]; SEC("uprobe.multi") int uprobe_0(struct pt_regs *ctx) @@ -37,3 +37,17 @@ int uprobe_3(struct pt_regs *ctx) uprobe_result[3]++; return 0; } + +SEC("uprobe.session") +int uprobe_4(struct pt_regs *ctx) +{ + uprobe_result[4]++; + return 0; +} + +SEC("uprobe.session") +int uprobe_5(struct pt_regs *ctx) +{ + uprobe_result[5]++; + return 1; +} -- 2.46.1
