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9c9f4a27eb
Symbolize stack traces by creating a live machine. Add this
functionality to dump_stack and switch dump_stack users to use
it. Switch TUI to use it. Add stack traces to the child test function
which can be useful to diagnose blocked code.
Example output:
```
$ perf test -vv PERF_RECORD_
...
7: PERF_RECORD_* events & perf_sample fields:
7: PERF_RECORD_* events & perf_sample fields : Running (1 active)
^C
Signal (2) while running tests.
Terminating tests with the same signal
Internal test harness failure. Completing any started tests:
: 7: PERF_RECORD_* events & perf_sample fields:
---- unexpected signal (2) ----
#0 0x55788c6210a3 in child_test_sig_handler builtin-test.c:0
#1 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0
#2 0x7fc12fe99687 in __internal_syscall_cancel cancellation.c:64
#3 0x7fc12fee5f7a in clock_nanosleep@GLIBC_2.2.5 clock_nanosleep.c:72
#4 0x7fc12fef1393 in __nanosleep nanosleep.c:26
#5 0x7fc12ff02d68 in __sleep sleep.c:55
#6 0x55788c63196b in test__PERF_RECORD perf-record.c:0
#7 0x55788c620fb0 in run_test_child builtin-test.c:0
#8 0x55788c5bd18d in start_command run-command.c:127
#9 0x55788c621ef3 in __cmd_test builtin-test.c:0
#10 0x55788c6225bf in cmd_test ??:0
#11 0x55788c5afbd0 in run_builtin perf.c:0
#12 0x55788c5afeeb in handle_internal_command perf.c:0
#13 0x55788c52b383 in main ??:0
#14 0x7fc12fe33ca8 in __libc_start_call_main libc_start_call_main.h:74
#15 0x7fc12fe33d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
#16 0x55788c52b9d1 in _start ??:0
---- unexpected signal (2) ----
#0 0x55788c6210a3 in child_test_sig_handler builtin-test.c:0
#1 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0
#2 0x7fc12fea3a14 in pthread_sigmask@GLIBC_2.2.5 pthread_sigmask.c:45
#3 0x7fc12fe49fd9 in __GI___sigprocmask sigprocmask.c:26
#4 0x7fc12ff2601b in __longjmp_chk longjmp.c:36
#5 0x55788c6210c0 in print_test_result.isra.0 builtin-test.c:0
#6 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0
#7 0x7fc12fe99687 in __internal_syscall_cancel cancellation.c:64
#8 0x7fc12fee5f7a in clock_nanosleep@GLIBC_2.2.5 clock_nanosleep.c:72
#9 0x7fc12fef1393 in __nanosleep nanosleep.c:26
#10 0x7fc12ff02d68 in __sleep sleep.c:55
#11 0x55788c63196b in test__PERF_RECORD perf-record.c:0
#12 0x55788c620fb0 in run_test_child builtin-test.c:0
#13 0x55788c5bd18d in start_command run-command.c:127
#14 0x55788c621ef3 in __cmd_test builtin-test.c:0
#15 0x55788c6225bf in cmd_test ??:0
#16 0x55788c5afbd0 in run_builtin perf.c:0
#17 0x55788c5afeeb in handle_internal_command perf.c:0
#18 0x55788c52b383 in main ??:0
#19 0x7fc12fe33ca8 in __libc_start_call_main libc_start_call_main.h:74
#20 0x7fc12fe33d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128
#21 0x55788c52b9d1 in _start ??:0
7: PERF_RECORD_* events & perf_sample fields : Skip (permissions)
```
Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250624210500.2121303-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* For debugging general purposes */
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#ifndef __PERF_DEBUG_H
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#define __PERF_DEBUG_H
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <linux/compiler.h>
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extern int verbose;
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extern int debug_kmaps;
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extern int debug_peo_args;
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extern bool quiet, dump_trace;
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extern int debug_ordered_events;
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extern int debug_data_convert;
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extern int debug_type_profile;
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#ifndef pr_fmt
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#define pr_fmt(fmt) fmt
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#endif
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#define pr_err(fmt, ...) \
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eprintf(0, verbose, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warning(fmt, ...) \
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eprintf(0, verbose, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warning_once(fmt, ...) ({ \
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static int __warned; \
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if (unlikely(!__warned)) { \
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pr_warning(fmt, ##__VA_ARGS__); \
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__warned = 1; \
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} \
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})
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#define pr_info(fmt, ...) \
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eprintf(0, verbose, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug(fmt, ...) \
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eprintf(1, verbose, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debugN(n, fmt, ...) \
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eprintf(n, verbose, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__)
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/* Special macro to print perf_event_open arguments/return value. */
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#define pr_debug2_peo(fmt, ...) { \
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if (debug_peo_args) \
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pr_debugN(0, pr_fmt(fmt), ##__VA_ARGS__); \
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else \
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pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__); \
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}
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#define pr_time_N(n, var, t, fmt, ...) \
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eprintf_time(n, var, t, fmt, ##__VA_ARGS__)
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#define pr_oe_time(t, fmt, ...) pr_time_N(1, debug_ordered_events, t, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_oe_time2(t, fmt, ...) pr_time_N(2, debug_ordered_events, t, pr_fmt(fmt), ##__VA_ARGS__)
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#define STRERR_BUFSIZE 128 /* For the buffer size of str_error_r */
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union perf_event;
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int dump_printf(const char *fmt, ...) __printf(1, 2);
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void trace_event(union perf_event *event);
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int ui__error(const char *format, ...) __printf(1, 2);
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int ui__warning(const char *format, ...) __printf(1, 2);
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#define ui__warning_once(format, ...) ({ \
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static int __warned; \
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if (unlikely(!__warned)) { \
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ui__warning(format, ##__VA_ARGS__); \
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__warned = 1; \
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} \
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})
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void pr_stat(const char *fmt, ...);
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int eprintf(int level, int var, const char *fmt, ...) __printf(3, 4);
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int eprintf_time(int level, int var, u64 t, const char *fmt, ...) __printf(4, 5);
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int veprintf(int level, int var, const char *fmt, va_list args);
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int perf_debug_option(const char *str);
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FILE *debug_file(void);
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void debug_set_file(FILE *file);
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void debug_set_display_time(bool set);
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void perf_debug_setup(void);
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int perf_quiet_option(void);
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void __dump_stack(FILE *file, void **stackdump, size_t stackdump_size);
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void dump_stack(void);
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void sighandler_dump_stack(int sig);
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#endif /* __PERF_DEBUG_H */
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