afef88e655
BPF object files are, in a way, the final artifact produced as part of the ahead-of-time compilation process. That makes them somewhat special compared to "regular" object files, which are a intermediate build artifacts that can typically be removed safely. As such, it can make sense to name them differently to make it easier to spot this difference at a glance. Among others, libbpf-bootstrap [0] has established the extension .bpf.o for BPF object files. It seems reasonable to follow this example and establish the same denomination for selftest build artifacts. To that end, this change adjusts the corresponding part of the build system and the test programs loading BPF object files to work with .bpf.o files. [0] https://github.com/libbpf/libbpf-bootstrap Suggested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220901222253.1199242-1-deso@posteo.net
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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void test_stacktrace_map(void)
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{
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int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
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const char *prog_name = "oncpu";
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int err, prog_fd, stack_trace_len;
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const char *file = "./test_stacktrace_map.bpf.o";
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__u32 key, val, duration = 0;
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struct bpf_program *prog;
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struct bpf_object *obj;
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struct bpf_link *link;
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err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
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if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
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return;
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prog = bpf_object__find_program_by_name(obj, prog_name);
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if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
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goto close_prog;
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link = bpf_program__attach_tracepoint(prog, "sched", "sched_switch");
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if (!ASSERT_OK_PTR(link, "attach_tp"))
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goto close_prog;
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/* find map fds */
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control_map_fd = bpf_find_map(__func__, obj, "control_map");
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if (CHECK_FAIL(control_map_fd < 0))
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goto disable_pmu;
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stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
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if (CHECK_FAIL(stackid_hmap_fd < 0))
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goto disable_pmu;
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stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
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if (CHECK_FAIL(stackmap_fd < 0))
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goto disable_pmu;
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stack_amap_fd = bpf_find_map(__func__, obj, "stack_amap");
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if (CHECK_FAIL(stack_amap_fd < 0))
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goto disable_pmu;
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/* give some time for bpf program run */
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sleep(1);
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/* disable stack trace collection */
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key = 0;
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val = 1;
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bpf_map_update_elem(control_map_fd, &key, &val, 0);
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/* for every element in stackid_hmap, we can find a corresponding one
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* in stackmap, and vise versa.
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*/
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err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
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if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
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if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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stack_trace_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
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err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
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if (CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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disable_pmu:
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bpf_link__destroy(link);
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close_prog:
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bpf_object__close(obj);
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}
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