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615741d81d
Move stackmap prog tests into separate files. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
104 lines
2.9 KiB
C
104 lines
2.9 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 *file = "./test_stacktrace_map.o";
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int bytes, efd, err, pmu_fd, prog_fd, stack_trace_len;
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struct perf_event_attr attr = {};
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__u32 key, val, duration = 0;
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struct bpf_object *obj;
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char buf[256];
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err = bpf_prog_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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/* Get the ID for the sched/sched_switch tracepoint */
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snprintf(buf, sizeof(buf),
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"/sys/kernel/debug/tracing/events/sched/sched_switch/id");
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efd = open(buf, O_RDONLY, 0);
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if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
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goto close_prog;
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bytes = read(efd, buf, sizeof(buf));
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close(efd);
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if (bytes <= 0 || bytes >= sizeof(buf))
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goto close_prog;
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/* Open the perf event and attach bpf progrram */
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attr.config = strtol(buf, NULL, 0);
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attr.type = PERF_TYPE_TRACEPOINT;
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attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_CALLCHAIN;
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attr.sample_period = 1;
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attr.wakeup_events = 1;
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pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
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0 /* cpu 0 */, -1 /* group id */,
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0 /* flags */);
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if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
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pmu_fd, errno))
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goto close_prog;
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err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
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if (err)
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goto disable_pmu;
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err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
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if (err)
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goto disable_pmu;
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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 (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 (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 (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 (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_noerr;
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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_noerr;
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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_noerr;
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goto disable_pmu_noerr;
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disable_pmu:
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error_cnt++;
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disable_pmu_noerr:
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ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
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close(pmu_fd);
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close_prog:
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bpf_object__close(obj);
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}
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