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![Yisheng Xie](/assets/img/avatar_default.png)
When using --quiet to disable messages, we will set the 'quiet' variable to 'true' first, then check that variable to decide whether we need to call perf_quiet_option(), so no need to set 'quiet' to 'true' once more in perf_quiet_option(). Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1520944274-37001-2-git-send-email-xieyisheng1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
284 lines
5.4 KiB
C
284 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* For general debugging purposes */
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#include "../perf.h"
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#include <inttypes.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/wait.h>
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#include <api/debug.h>
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#include <linux/time64.h>
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#ifdef HAVE_BACKTRACE_SUPPORT
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#include <execinfo.h>
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#endif
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#include "cache.h"
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#include "color.h"
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#include "event.h"
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#include "debug.h"
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#include "print_binary.h"
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#include "util.h"
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#include "target.h"
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#include "sane_ctype.h"
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int verbose;
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bool dump_trace = false, quiet = false;
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int debug_ordered_events;
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static int redirect_to_stderr;
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int debug_data_convert;
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int veprintf(int level, int var, const char *fmt, va_list args)
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{
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int ret = 0;
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if (var >= level) {
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if (use_browser >= 1 && !redirect_to_stderr)
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ui_helpline__vshow(fmt, args);
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else
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ret = vfprintf(stderr, fmt, args);
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}
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return ret;
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}
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int eprintf(int level, int var, const char *fmt, ...)
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{
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va_list args;
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int ret;
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va_start(args, fmt);
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ret = veprintf(level, var, fmt, args);
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va_end(args);
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return ret;
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}
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static int veprintf_time(u64 t, const char *fmt, va_list args)
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{
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int ret = 0;
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u64 secs, usecs, nsecs = t;
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secs = nsecs / NSEC_PER_SEC;
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nsecs -= secs * NSEC_PER_SEC;
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usecs = nsecs / NSEC_PER_USEC;
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ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
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secs, usecs);
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ret += vfprintf(stderr, fmt, args);
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return ret;
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}
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int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
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{
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int ret = 0;
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va_list args;
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if (var >= level) {
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va_start(args, fmt);
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ret = veprintf_time(t, fmt, args);
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va_end(args);
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}
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return ret;
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}
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/*
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* Overloading libtraceevent standard info print
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* function, display with -v in perf.
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*/
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void pr_stat(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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veprintf(1, verbose, fmt, args);
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va_end(args);
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eprintf(1, verbose, "\n");
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}
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int dump_printf(const char *fmt, ...)
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{
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va_list args;
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int ret = 0;
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if (dump_trace) {
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va_start(args, fmt);
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ret = vprintf(fmt, args);
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va_end(args);
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}
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return ret;
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}
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static int trace_event_printer(enum binary_printer_ops op,
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unsigned int val, void *extra, FILE *fp)
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{
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const char *color = PERF_COLOR_BLUE;
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union perf_event *event = (union perf_event *)extra;
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unsigned char ch = (unsigned char)val;
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int printed = 0;
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switch (op) {
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case BINARY_PRINT_DATA_BEGIN:
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printed += fprintf(fp, ".");
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printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
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event->header.size);
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break;
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case BINARY_PRINT_LINE_BEGIN:
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printed += fprintf(fp, ".");
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break;
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case BINARY_PRINT_ADDR:
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printed += color_fprintf(fp, color, " %04x: ", val);
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break;
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case BINARY_PRINT_NUM_DATA:
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printed += color_fprintf(fp, color, " %02x", val);
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break;
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case BINARY_PRINT_NUM_PAD:
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printed += color_fprintf(fp, color, " ");
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break;
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case BINARY_PRINT_SEP:
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printed += color_fprintf(fp, color, " ");
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break;
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case BINARY_PRINT_CHAR_DATA:
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printed += color_fprintf(fp, color, "%c",
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isprint(ch) ? ch : '.');
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break;
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case BINARY_PRINT_CHAR_PAD:
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printed += color_fprintf(fp, color, " ");
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break;
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case BINARY_PRINT_LINE_END:
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printed += color_fprintf(fp, color, "\n");
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break;
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case BINARY_PRINT_DATA_END:
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printed += fprintf(fp, "\n");
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break;
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default:
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break;
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}
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return printed;
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}
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void trace_event(union perf_event *event)
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{
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unsigned char *raw_event = (void *)event;
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if (!dump_trace)
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return;
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print_binary(raw_event, event->header.size, 16,
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trace_event_printer, event);
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}
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static struct debug_variable {
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const char *name;
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int *ptr;
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} debug_variables[] = {
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{ .name = "verbose", .ptr = &verbose },
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{ .name = "ordered-events", .ptr = &debug_ordered_events},
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{ .name = "stderr", .ptr = &redirect_to_stderr},
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{ .name = "data-convert", .ptr = &debug_data_convert },
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{ .name = NULL, }
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};
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int perf_debug_option(const char *str)
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{
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struct debug_variable *var = &debug_variables[0];
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char *vstr, *s = strdup(str);
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int v = 1;
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vstr = strchr(s, '=');
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if (vstr)
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*vstr++ = 0;
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while (var->name) {
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if (!strcmp(s, var->name))
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break;
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var++;
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}
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if (!var->name) {
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pr_err("Unknown debug variable name '%s'\n", s);
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free(s);
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return -1;
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}
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if (vstr) {
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v = atoi(vstr);
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/*
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* Allow only values in range (0, 10),
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* otherwise set 0.
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*/
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v = (v < 0) || (v > 10) ? 0 : v;
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}
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if (quiet)
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v = -1;
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*var->ptr = v;
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free(s);
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return 0;
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}
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int perf_quiet_option(void)
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{
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struct debug_variable *var = &debug_variables[0];
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/* disable all debug messages */
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while (var->name) {
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*var->ptr = -1;
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var++;
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}
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return 0;
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}
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#define DEBUG_WRAPPER(__n, __l) \
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static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
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{ \
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va_list args; \
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int ret; \
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\
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va_start(args, fmt); \
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ret = veprintf(__l, verbose, fmt, args); \
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va_end(args); \
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return ret; \
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}
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DEBUG_WRAPPER(warning, 0);
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DEBUG_WRAPPER(debug, 1);
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void perf_debug_setup(void)
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{
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libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
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}
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/* Obtain a backtrace and print it to stdout. */
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#ifdef HAVE_BACKTRACE_SUPPORT
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void dump_stack(void)
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{
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void *array[16];
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size_t size = backtrace(array, ARRAY_SIZE(array));
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char **strings = backtrace_symbols(array, size);
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size_t i;
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printf("Obtained %zd stack frames.\n", size);
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for (i = 0; i < size; i++)
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printf("%s\n", strings[i]);
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free(strings);
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}
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#else
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void dump_stack(void) {}
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#endif
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void sighandler_dump_stack(int sig)
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{
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psignal(sig, "perf");
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dump_stack();
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signal(sig, SIG_DFL);
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raise(sig);
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}
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