diff options
| author | Alan Maguire <alan.maguire@oracle.com> | 2022-03-30 16:26:38 +0100 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2022-04-03 19:55:57 -0700 |
| commit | 39f8dc43b7a05ab0e352655a14a9d613c2308b92 (patch) | |
| tree | 32ebf3438890623070e52d37c9cff2944ef2cb1b /tools/testing | |
| parent | 433966e3ae04165811b116af492a684bad7a158c (diff) | |
libbpf: Add auto-attach for uprobes based on section name
Now that u[ret]probes can use name-based specification, it makes
sense to add support for auto-attach based on SEC() definition.
The format proposed is
SEC("u[ret]probe/binary:[raw_offset|[function_name[+offset]]")
For example, to trace malloc() in libc:
SEC("uprobe/libc.so.6:malloc")
...or to trace function foo2 in /usr/bin/foo:
SEC("uprobe//usr/bin/foo:foo2")
Auto-attach is done for all tasks (pid -1). prog can be an absolute
path or simply a program/library name; in the latter case, we use
PATH/LD_LIBRARY_PATH to resolve the full path, falling back to
standard locations (/usr/bin:/usr/sbin or /usr/lib64:/usr/lib) if
the file is not found via environment-variable specified locations.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1648654000-21758-4-git-send-email-alan.maguire@oracle.com
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_bpf_cookie.c | 4 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_task_pt_regs.c | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/trigger_bench.c | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_cookie.c b/tools/testing/selftests/bpf/progs/test_bpf_cookie.c index 2d3a7710e2ce..0e2222968918 100644 --- a/tools/testing/selftests/bpf/progs/test_bpf_cookie.c +++ b/tools/testing/selftests/bpf/progs/test_bpf_cookie.c @@ -37,14 +37,14 @@ int handle_kretprobe(struct pt_regs *ctx) return 0; } -SEC("uprobe/trigger_func") +SEC("uprobe") int handle_uprobe(struct pt_regs *ctx) { update(ctx, &uprobe_res); return 0; } -SEC("uretprobe/trigger_func") +SEC("uretprobe") int handle_uretprobe(struct pt_regs *ctx) { update(ctx, &uretprobe_res); diff --git a/tools/testing/selftests/bpf/progs/test_task_pt_regs.c b/tools/testing/selftests/bpf/progs/test_task_pt_regs.c index e6cb09259408..1926facba122 100644 --- a/tools/testing/selftests/bpf/progs/test_task_pt_regs.c +++ b/tools/testing/selftests/bpf/progs/test_task_pt_regs.c @@ -14,7 +14,7 @@ char current_regs[PT_REGS_SIZE] = {}; char ctx_regs[PT_REGS_SIZE] = {}; int uprobe_res = 0; -SEC("uprobe/trigger_func") +SEC("uprobe") int handle_uprobe(struct pt_regs *ctx) { struct task_struct *current; diff --git a/tools/testing/selftests/bpf/progs/trigger_bench.c b/tools/testing/selftests/bpf/progs/trigger_bench.c index 2ab049b54d6c..694e7cec1823 100644 --- a/tools/testing/selftests/bpf/progs/trigger_bench.c +++ b/tools/testing/selftests/bpf/progs/trigger_bench.c @@ -54,7 +54,7 @@ int bench_trigger_fmodret(void *ctx) return -22; } -SEC("uprobe/self/uprobe_target") +SEC("uprobe") int bench_trigger_uprobe(void *ctx) { __sync_add_and_fetch(&hits, 1); |