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- // SPDX-License-Identifier: GPL-2.0
- /* For general debugging purposes */
- #include <inttypes.h>
- #include <string.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <sys/wait.h>
- #include <api/debug.h>
- #include <linux/kernel.h>
- #include <linux/time64.h>
- #ifdef HAVE_BACKTRACE_SUPPORT
- #include <execinfo.h>
- #endif
- #include "color.h"
- #include "event.h"
- #include "debug.h"
- #include "print_binary.h"
- #include "target.h"
- #include "ui/helpline.h"
- #include "ui/ui.h"
- #include "util/parse-sublevel-options.h"
- #include <linux/ctype.h>
- int verbose;
- int debug_peo_args;
- bool dump_trace = false, quiet = false;
- int debug_ordered_events;
- static int redirect_to_stderr;
- int debug_data_convert;
- int veprintf(int level, int var, const char *fmt, va_list args)
- {
- int ret = 0;
- if (var >= level) {
- if (use_browser >= 1 && !redirect_to_stderr)
- ui_helpline__vshow(fmt, args);
- else
- ret = vfprintf(stderr, fmt, args);
- }
- return ret;
- }
- int eprintf(int level, int var, const char *fmt, ...)
- {
- va_list args;
- int ret;
- va_start(args, fmt);
- ret = veprintf(level, var, fmt, args);
- va_end(args);
- return ret;
- }
- static int veprintf_time(u64 t, const char *fmt, va_list args)
- {
- int ret = 0;
- u64 secs, usecs, nsecs = t;
- secs = nsecs / NSEC_PER_SEC;
- nsecs -= secs * NSEC_PER_SEC;
- usecs = nsecs / NSEC_PER_USEC;
- ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
- secs, usecs);
- ret += vfprintf(stderr, fmt, args);
- return ret;
- }
- int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
- {
- int ret = 0;
- va_list args;
- if (var >= level) {
- va_start(args, fmt);
- ret = veprintf_time(t, fmt, args);
- va_end(args);
- }
- return ret;
- }
- /*
- * Overloading libtraceevent standard info print
- * function, display with -v in perf.
- */
- void pr_stat(const char *fmt, ...)
- {
- va_list args;
- va_start(args, fmt);
- veprintf(1, verbose, fmt, args);
- va_end(args);
- eprintf(1, verbose, "\n");
- }
- int dump_printf(const char *fmt, ...)
- {
- va_list args;
- int ret = 0;
- if (dump_trace) {
- va_start(args, fmt);
- ret = vprintf(fmt, args);
- va_end(args);
- }
- return ret;
- }
- static int trace_event_printer(enum binary_printer_ops op,
- unsigned int val, void *extra, FILE *fp)
- {
- const char *color = PERF_COLOR_BLUE;
- union perf_event *event = (union perf_event *)extra;
- unsigned char ch = (unsigned char)val;
- int printed = 0;
- switch (op) {
- case BINARY_PRINT_DATA_BEGIN:
- printed += fprintf(fp, ".");
- printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
- event->header.size);
- break;
- case BINARY_PRINT_LINE_BEGIN:
- printed += fprintf(fp, ".");
- break;
- case BINARY_PRINT_ADDR:
- printed += color_fprintf(fp, color, " %04x: ", val);
- break;
- case BINARY_PRINT_NUM_DATA:
- printed += color_fprintf(fp, color, " %02x", val);
- break;
- case BINARY_PRINT_NUM_PAD:
- printed += color_fprintf(fp, color, " ");
- break;
- case BINARY_PRINT_SEP:
- printed += color_fprintf(fp, color, " ");
- break;
- case BINARY_PRINT_CHAR_DATA:
- printed += color_fprintf(fp, color, "%c",
- isprint(ch) && isascii(ch) ? ch : '.');
- break;
- case BINARY_PRINT_CHAR_PAD:
- printed += color_fprintf(fp, color, " ");
- break;
- case BINARY_PRINT_LINE_END:
- printed += color_fprintf(fp, color, "\n");
- break;
- case BINARY_PRINT_DATA_END:
- printed += fprintf(fp, "\n");
- break;
- default:
- break;
- }
- return printed;
- }
- void trace_event(union perf_event *event)
- {
- unsigned char *raw_event = (void *)event;
- if (!dump_trace)
- return;
- print_binary(raw_event, event->header.size, 16,
- trace_event_printer, event);
- }
- static struct sublevel_option debug_opts[] = {
- { .name = "verbose", .value_ptr = &verbose },
- { .name = "ordered-events", .value_ptr = &debug_ordered_events},
- { .name = "stderr", .value_ptr = &redirect_to_stderr},
- { .name = "data-convert", .value_ptr = &debug_data_convert },
- { .name = "perf-event-open", .value_ptr = &debug_peo_args },
- { .name = NULL, }
- };
- int perf_debug_option(const char *str)
- {
- int ret;
- ret = perf_parse_sublevel_options(str, debug_opts);
- if (ret)
- return ret;
- /* Allow only verbose value in range (0, 10), otherwise set 0. */
- verbose = (verbose < 0) || (verbose > 10) ? 0 : verbose;
- return 0;
- }
- int perf_quiet_option(void)
- {
- struct sublevel_option *opt = &debug_opts[0];
- /* disable all debug messages */
- while (opt->name) {
- *opt->value_ptr = -1;
- opt++;
- }
- return 0;
- }
- #define DEBUG_WRAPPER(__n, __l) \
- static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
- { \
- va_list args; \
- int ret; \
- \
- va_start(args, fmt); \
- ret = veprintf(__l, verbose, fmt, args); \
- va_end(args); \
- return ret; \
- }
- DEBUG_WRAPPER(warning, 0);
- DEBUG_WRAPPER(debug, 1);
- void perf_debug_setup(void)
- {
- libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
- }
- /* Obtain a backtrace and print it to stdout. */
- #ifdef HAVE_BACKTRACE_SUPPORT
- void dump_stack(void)
- {
- void *array[16];
- size_t size = backtrace(array, ARRAY_SIZE(array));
- char **strings = backtrace_symbols(array, size);
- size_t i;
- printf("Obtained %zd stack frames.\n", size);
- for (i = 0; i < size; i++)
- printf("%s\n", strings[i]);
- free(strings);
- }
- #else
- void dump_stack(void) {}
- #endif
- void sighandler_dump_stack(int sig)
- {
- psignal(sig, "perf");
- dump_stack();
- signal(sig, SIG_DFL);
- raise(sig);
- }
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