e1cc1f3998
Add a test case for stacktrace with skip > 0 using a small sized buffer. It didn't support skipping entries greater than or equal to the size of buffer and filled the skipped part with 0. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220314182042.71025-2-namhyung@kernel.org
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include "stacktrace_map_skip.skel.h"
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#define TEST_STACK_DEPTH 2
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void test_stacktrace_map_skip(void)
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{
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struct stacktrace_map_skip *skel;
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int stackid_hmap_fd, stackmap_fd, stack_amap_fd;
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int err, stack_trace_len;
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skel = stacktrace_map_skip__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
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return;
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/* find map fds */
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stackid_hmap_fd = bpf_map__fd(skel->maps.stackid_hmap);
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if (!ASSERT_GE(stackid_hmap_fd, 0, "stackid_hmap fd"))
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goto out;
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stackmap_fd = bpf_map__fd(skel->maps.stackmap);
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if (!ASSERT_GE(stackmap_fd, 0, "stackmap fd"))
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goto out;
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stack_amap_fd = bpf_map__fd(skel->maps.stack_amap);
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if (!ASSERT_GE(stack_amap_fd, 0, "stack_amap fd"))
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goto out;
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skel->bss->pid = getpid();
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err = stacktrace_map_skip__attach(skel);
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if (!ASSERT_OK(err, "skel_attach"))
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goto out;
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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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skel->bss->control = 1;
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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 (!ASSERT_OK(err, "compare_map_keys stackid_hmap vs. stackmap"))
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goto out;
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err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
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if (!ASSERT_OK(err, "compare_map_keys stackmap vs. stackid_hmap"))
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goto out;
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stack_trace_len = TEST_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 (!ASSERT_OK(err, "compare_stack_ips stackmap vs. stack_amap"))
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goto out;
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if (!ASSERT_EQ(skel->bss->failed, 0, "skip_failed"))
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goto out;
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out:
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stacktrace_map_skip__destroy(skel);
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}
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