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Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/attach_probe.c')
-rw-r--r--tools/testing/selftests/bpf/prog_tests/attach_probe.c161
1 files changed, 36 insertions, 125 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/attach_probe.c b/tools/testing/selftests/bpf/prog_tests/attach_probe.c
index a83111a32d4a..a0ee87c8e1ea 100644
--- a/tools/testing/selftests/bpf/prog_tests/attach_probe.c
+++ b/tools/testing/selftests/bpf/prog_tests/attach_probe.c
@@ -1,26 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
-
-#define EMBED_FILE(NAME, PATH) \
-asm ( \
-" .pushsection \".rodata\", \"a\", @progbits \n" \
-" .global "#NAME"_data \n" \
-#NAME"_data: \n" \
-" .incbin \"" PATH "\" \n" \
-#NAME"_data_end: \n" \
-" .global "#NAME"_size \n" \
-" .type "#NAME"_size, @object \n" \
-" .size "#NAME"_size, 4 \n" \
-" .align 4, \n" \
-#NAME"_size: \n" \
-" .int "#NAME"_data_end - "#NAME"_data \n" \
-" .popsection \n" \
-); \
-extern char NAME##_data[]; \
-extern int NAME##_size;
+#include "test_attach_probe.skel.h"
ssize_t get_base_addr() {
- size_t start;
+ size_t start, offset;
char buf[256];
FILE *f;
@@ -28,10 +11,11 @@ ssize_t get_base_addr() {
if (!f)
return -errno;
- while (fscanf(f, "%zx-%*x %s %*s\n", &start, buf) == 2) {
+ while (fscanf(f, "%zx-%*x %s %zx %*[^\n]\n",
+ &start, buf, &offset) == 3) {
if (strcmp(buf, "r-xp") == 0) {
fclose(f);
- return start;
+ return start - offset;
}
}
@@ -39,30 +23,12 @@ ssize_t get_base_addr() {
return -EINVAL;
}
-EMBED_FILE(probe, "test_attach_probe.o");
-
void test_attach_probe(void)
{
- const char *kprobe_name = "kprobe/sys_nanosleep";
- const char *kretprobe_name = "kretprobe/sys_nanosleep";
- const char *uprobe_name = "uprobe/trigger_func";
- const char *uretprobe_name = "uretprobe/trigger_func";
- const int kprobe_idx = 0, kretprobe_idx = 1;
- const int uprobe_idx = 2, uretprobe_idx = 3;
- const char *obj_name = "attach_probe";
- DECLARE_LIBBPF_OPTS(bpf_object_open_opts, open_opts,
- .object_name = obj_name,
- .relaxed_maps = true,
- );
- struct bpf_program *kprobe_prog, *kretprobe_prog;
- struct bpf_program *uprobe_prog, *uretprobe_prog;
- struct bpf_object *obj;
- int err, duration = 0, res;
- struct bpf_link *kprobe_link = NULL;
- struct bpf_link *kretprobe_link = NULL;
- struct bpf_link *uprobe_link = NULL;
- struct bpf_link *uretprobe_link = NULL;
- int results_map_fd;
+ int duration = 0;
+ struct bpf_link *kprobe_link, *kretprobe_link;
+ struct bpf_link *uprobe_link, *uretprobe_link;
+ struct test_attach_probe* skel;
size_t uprobe_offset;
ssize_t base_addr;
@@ -72,123 +38,68 @@ void test_attach_probe(void)
return;
uprobe_offset = (size_t)&get_base_addr - base_addr;
- /* open object */
- obj = bpf_object__open_mem(probe_data, probe_size, &open_opts);
- if (CHECK(IS_ERR(obj), "obj_open_mem", "err %ld\n", PTR_ERR(obj)))
+ skel = test_attach_probe__open_and_load();
+ if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
return;
-
- if (CHECK(strcmp(bpf_object__name(obj), obj_name), "obj_name",
- "wrong obj name '%s', expected '%s'\n",
- bpf_object__name(obj), obj_name))
+ if (CHECK(!skel->bss, "check_bss", ".bss wasn't mmap()-ed\n"))
goto cleanup;
- kprobe_prog = bpf_object__find_program_by_title(obj, kprobe_name);
- if (CHECK(!kprobe_prog, "find_probe",
- "prog '%s' not found\n", kprobe_name))
- goto cleanup;
- kretprobe_prog = bpf_object__find_program_by_title(obj, kretprobe_name);
- if (CHECK(!kretprobe_prog, "find_probe",
- "prog '%s' not found\n", kretprobe_name))
- goto cleanup;
- uprobe_prog = bpf_object__find_program_by_title(obj, uprobe_name);
- if (CHECK(!uprobe_prog, "find_probe",
- "prog '%s' not found\n", uprobe_name))
- goto cleanup;
- uretprobe_prog = bpf_object__find_program_by_title(obj, uretprobe_name);
- if (CHECK(!uretprobe_prog, "find_probe",
- "prog '%s' not found\n", uretprobe_name))
- goto cleanup;
-
- /* create maps && load programs */
- err = bpf_object__load(obj);
- if (CHECK(err, "obj_load", "err %d\n", err))
- goto cleanup;
-
- /* load maps */
- results_map_fd = bpf_find_map(__func__, obj, "results_map");
- if (CHECK(results_map_fd < 0, "find_results_map",
- "err %d\n", results_map_fd))
- goto cleanup;
-
- kprobe_link = bpf_program__attach_kprobe(kprobe_prog,
+ kprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kprobe,
false /* retprobe */,
SYS_NANOSLEEP_KPROBE_NAME);
if (CHECK(IS_ERR(kprobe_link), "attach_kprobe",
- "err %ld\n", PTR_ERR(kprobe_link))) {
- kprobe_link = NULL;
+ "err %ld\n", PTR_ERR(kprobe_link)))
goto cleanup;
- }
- kretprobe_link = bpf_program__attach_kprobe(kretprobe_prog,
+ skel->links.handle_kprobe = kprobe_link;
+
+ kretprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kretprobe,
true /* retprobe */,
SYS_NANOSLEEP_KPROBE_NAME);
if (CHECK(IS_ERR(kretprobe_link), "attach_kretprobe",
- "err %ld\n", PTR_ERR(kretprobe_link))) {
- kretprobe_link = NULL;
+ "err %ld\n", PTR_ERR(kretprobe_link)))
goto cleanup;
- }
- uprobe_link = bpf_program__attach_uprobe(uprobe_prog,
+ skel->links.handle_kretprobe = kretprobe_link;
+
+ uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
false /* retprobe */,
0 /* self pid */,
"/proc/self/exe",
uprobe_offset);
if (CHECK(IS_ERR(uprobe_link), "attach_uprobe",
- "err %ld\n", PTR_ERR(uprobe_link))) {
- uprobe_link = NULL;
+ "err %ld\n", PTR_ERR(uprobe_link)))
goto cleanup;
- }
- uretprobe_link = bpf_program__attach_uprobe(uretprobe_prog,
+ skel->links.handle_uprobe = uprobe_link;
+
+ uretprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uretprobe,
true /* retprobe */,
-1 /* any pid */,
"/proc/self/exe",
uprobe_offset);
if (CHECK(IS_ERR(uretprobe_link), "attach_uretprobe",
- "err %ld\n", PTR_ERR(uretprobe_link))) {
- uretprobe_link = NULL;
+ "err %ld\n", PTR_ERR(uretprobe_link)))
goto cleanup;
- }
+ skel->links.handle_uretprobe = uretprobe_link;
/* trigger & validate kprobe && kretprobe */
usleep(1);
- err = bpf_map_lookup_elem(results_map_fd, &kprobe_idx, &res);
- if (CHECK(err, "get_kprobe_res",
- "failed to get kprobe res: %d\n", err))
+ if (CHECK(skel->bss->kprobe_res != 1, "check_kprobe_res",
+ "wrong kprobe res: %d\n", skel->bss->kprobe_res))
goto cleanup;
- if (CHECK(res != kprobe_idx + 1, "check_kprobe_res",
- "wrong kprobe res: %d\n", res))
- goto cleanup;
-
- err = bpf_map_lookup_elem(results_map_fd, &kretprobe_idx, &res);
- if (CHECK(err, "get_kretprobe_res",
- "failed to get kretprobe res: %d\n", err))
- goto cleanup;
- if (CHECK(res != kretprobe_idx + 1, "check_kretprobe_res",
- "wrong kretprobe res: %d\n", res))
+ if (CHECK(skel->bss->kretprobe_res != 2, "check_kretprobe_res",
+ "wrong kretprobe res: %d\n", skel->bss->kretprobe_res))
goto cleanup;
/* trigger & validate uprobe & uretprobe */
get_base_addr();
- err = bpf_map_lookup_elem(results_map_fd, &uprobe_idx, &res);
- if (CHECK(err, "get_uprobe_res",
- "failed to get uprobe res: %d\n", err))
- goto cleanup;
- if (CHECK(res != uprobe_idx + 1, "check_uprobe_res",
- "wrong uprobe res: %d\n", res))
- goto cleanup;
-
- err = bpf_map_lookup_elem(results_map_fd, &uretprobe_idx, &res);
- if (CHECK(err, "get_uretprobe_res",
- "failed to get uretprobe res: %d\n", err))
+ if (CHECK(skel->bss->uprobe_res != 3, "check_uprobe_res",
+ "wrong uprobe res: %d\n", skel->bss->uprobe_res))
goto cleanup;
- if (CHECK(res != uretprobe_idx + 1, "check_uretprobe_res",
- "wrong uretprobe res: %d\n", res))
+ if (CHECK(skel->bss->uretprobe_res != 4, "check_uretprobe_res",
+ "wrong uretprobe res: %d\n", skel->bss->uretprobe_res))
goto cleanup;
cleanup:
- bpf_link__destroy(kprobe_link);
- bpf_link__destroy(kretprobe_link);
- bpf_link__destroy(uprobe_link);
- bpf_link__destroy(uretprobe_link);
- bpf_object__close(obj);
+ test_attach_probe__destroy(skel);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.