int ret;
symbol_conf.sort_by_name = true;
- ret = symbol__init();
+ ret = symbol__init(NULL);
if (ret < 0) {
pr_debug("Failed to init symbol map.\n");
goto out;
const char *vmlinux_name;
if (module) {
- list_for_each_entry(dso, &host_machine->kernel_dsos, node) {
+ list_for_each_entry(dso, &host_machine->kernel_dsos.head,
+ node) {
if (strncmp(dso->short_name + 1, module,
dso->short_name_len - 2) == 0)
goto found;
#ifdef HAVE_DWARF_SUPPORT
/* Open new debuginfo of given module */
-static struct debuginfo *open_debuginfo(const char *module)
+static struct debuginfo *open_debuginfo(const char *module, bool silent)
{
const char *path = module;
+ struct debuginfo *ret;
if (!module || !strchr(module, '/')) {
path = kernel_get_module_path(module);
if (!path) {
- pr_err("Failed to find path of %s module.\n",
- module ?: "kernel");
+ if (!silent)
+ pr_err("Failed to find path of %s module.\n",
+ module ?: "kernel");
return NULL;
}
}
- return debuginfo__new(path);
+ ret = debuginfo__new(path);
+ if (!ret && !silent) {
+ pr_warning("The %s file has no debug information.\n", path);
+ if (!module || !strtailcmp(path, ".ko"))
+ pr_warning("Rebuild with CONFIG_DEBUG_INFO=y, ");
+ else
+ pr_warning("Rebuild with -g, ");
+ pr_warning("or install an appropriate debuginfo package.\n");
+ }
+ return ret;
}
+
static int get_text_start_address(const char *exec, unsigned long *address)
{
Elf *elf;
pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
tp->module ? : "kernel");
- dinfo = open_debuginfo(tp->module);
+ dinfo = open_debuginfo(tp->module, verbose == 0);
if (dinfo) {
ret = debuginfo__find_probe_point(dinfo,
(unsigned long)addr, pp);
debuginfo__delete(dinfo);
- } else {
- pr_debug("Failed to open debuginfo at 0x%" PRIx64 "\n", addr);
+ } else
ret = -ENOENT;
- }
if (ret > 0) {
pp->retprobe = tp->retprobe;
struct debuginfo *dinfo;
int ntevs, ret = 0;
- dinfo = open_debuginfo(target);
+ dinfo = open_debuginfo(target, !need_dwarf);
if (!dinfo) {
- if (need_dwarf) {
- pr_warning("Failed to open debuginfo file.\n");
+ if (need_dwarf)
return -ENOENT;
- }
pr_debug("Could not open debuginfo. Try to use symbols.\n");
return 0;
}
static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
{
- char buf[LINEBUF_SIZE];
+ char buf[LINEBUF_SIZE], sbuf[STRERR_BUFSIZE];
const char *color = show_num ? "" : PERF_COLOR_BLUE;
const char *prefix = NULL;
return 1;
error:
if (ferror(fp)) {
- pr_warning("File read error: %s\n", strerror(errno));
+ pr_warning("File read error: %s\n",
+ strerror_r(errno, sbuf, sizeof(sbuf)));
return -1;
}
return 0;
FILE *fp;
int ret;
char *tmp;
+ char sbuf[STRERR_BUFSIZE];
/* Search a line range */
- dinfo = open_debuginfo(module);
- if (!dinfo) {
- pr_warning("Failed to open debuginfo file.\n");
+ dinfo = open_debuginfo(module, false);
+ if (!dinfo)
return -ENOENT;
- }
ret = debuginfo__find_line_range(dinfo, lr);
debuginfo__delete(dinfo);
fp = fopen(lr->path, "r");
if (fp == NULL) {
pr_warning("Failed to open %s: %s\n", lr->path,
- strerror(errno));
+ strerror_r(errno, sbuf, sizeof(sbuf)));
return -errno;
}
/* Skip to starting line number */
return ret;
}
-int show_line_range(struct line_range *lr, const char *module)
+int show_line_range(struct line_range *lr, const char *module, bool user)
{
int ret;
- ret = init_symbol_maps(false);
+ ret = init_symbol_maps(user);
if (ret < 0)
return ret;
ret = __show_line_range(lr, module);
int i, ret = 0;
struct debuginfo *dinfo;
- ret = init_symbol_maps(false);
+ ret = init_symbol_maps(pevs->uprobes);
if (ret < 0)
return ret;
- dinfo = open_debuginfo(module);
+ dinfo = open_debuginfo(module, false);
if (!dinfo) {
- pr_warning("Failed to open debuginfo file.\n");
ret = -ENOENT;
goto out;
}
}
int show_line_range(struct line_range *lr __maybe_unused,
- const char *module __maybe_unused)
+ const char *module __maybe_unused,
+ bool user __maybe_unused)
{
pr_warning("Debuginfo-analysis is not supported.\n");
return -ENOSYS;
return tmp - buf;
error:
- pr_debug("Failed to synthesize perf probe argument: %s\n",
- strerror(-ret));
+ pr_debug("Failed to synthesize perf probe argument: %d\n", ret);
return ret;
}
return buf;
error:
- pr_debug("Failed to synthesize perf probe point: %s\n",
- strerror(-ret));
+ pr_debug("Failed to synthesize perf probe point: %d\n", ret);
free(buf);
return NULL;
}
memset(tev, 0, sizeof(*tev));
}
-static void print_warn_msg(const char *file, bool is_kprobe)
+static void print_open_warning(int err, bool is_kprobe)
{
+ char sbuf[STRERR_BUFSIZE];
- if (errno == ENOENT) {
+ if (err == -ENOENT) {
const char *config;
if (!is_kprobe)
else
config = "CONFIG_KPROBE_EVENTS";
- pr_warning("%s file does not exist - please rebuild kernel"
- " with %s.\n", file, config);
- } else
- pr_warning("Failed to open %s file: %s\n", file,
- strerror(errno));
+ pr_warning("%cprobe_events file does not exist"
+ " - please rebuild kernel with %s.\n",
+ is_kprobe ? 'k' : 'u', config);
+ } else if (err == -ENOTSUP)
+ pr_warning("Debugfs is not mounted.\n");
+ else
+ pr_warning("Failed to open %cprobe_events: %s\n",
+ is_kprobe ? 'k' : 'u',
+ strerror_r(-err, sbuf, sizeof(sbuf)));
+}
+
+static void print_both_open_warning(int kerr, int uerr)
+{
+ /* Both kprobes and uprobes are disabled, warn it. */
+ if (kerr == -ENOTSUP && uerr == -ENOTSUP)
+ pr_warning("Debugfs is not mounted.\n");
+ else if (kerr == -ENOENT && uerr == -ENOENT)
+ pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS "
+ "or/and CONFIG_UPROBE_EVENTS.\n");
+ else {
+ char sbuf[STRERR_BUFSIZE];
+ pr_warning("Failed to open kprobe events: %s.\n",
+ strerror_r(-kerr, sbuf, sizeof(sbuf)));
+ pr_warning("Failed to open uprobe events: %s.\n",
+ strerror_r(-uerr, sbuf, sizeof(sbuf)));
+ }
}
-static int open_probe_events(const char *trace_file, bool readwrite,
- bool is_kprobe)
+static int open_probe_events(const char *trace_file, bool readwrite)
{
char buf[PATH_MAX];
const char *__debugfs;
int ret;
__debugfs = debugfs_find_mountpoint();
- if (__debugfs == NULL) {
- pr_warning("Debugfs is not mounted.\n");
- return -ENOENT;
- }
+ if (__debugfs == NULL)
+ return -ENOTSUP;
ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file);
if (ret >= 0) {
ret = open(buf, O_RDONLY, 0);
if (ret < 0)
- print_warn_msg(buf, is_kprobe);
+ ret = -errno;
}
return ret;
}
static int open_kprobe_events(bool readwrite)
{
- return open_probe_events("tracing/kprobe_events", readwrite, true);
+ return open_probe_events("tracing/kprobe_events", readwrite);
}
static int open_uprobe_events(bool readwrite)
{
- return open_probe_events("tracing/uprobe_events", readwrite, false);
+ return open_probe_events("tracing/uprobe_events", readwrite);
}
/* Get raw string list of current kprobe_events or uprobe_events */
p[idx] = '\0';
ret = strlist__add(sl, buf);
if (ret < 0) {
- pr_debug("strlist__add failed: %s\n", strerror(-ret));
+ pr_debug("strlist__add failed (%d)\n", ret);
strlist__delete(sl);
return NULL;
}
if (ret < 0)
return ret;
- printf(" %-20s (on %s", buf, place);
+ pr_info(" %-20s (on %s", buf, place);
if (module)
- printf(" in %s", module);
+ pr_info(" in %s", module);
if (pev->nargs > 0) {
- printf(" with");
+ pr_info(" with");
for (i = 0; i < pev->nargs; i++) {
ret = synthesize_perf_probe_arg(&pev->args[i],
buf, 128);
if (ret < 0)
break;
- printf(" %s", buf);
+ pr_info(" %s", buf);
}
}
- printf(")\n");
+ pr_info(")\n");
free(place);
return ret;
}
rawlist = get_probe_trace_command_rawlist(fd);
if (!rawlist)
- return -ENOENT;
+ return -ENOMEM;
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
/* List up current perf-probe events */
int show_perf_probe_events(void)
{
- int fd, ret;
+ int kp_fd, up_fd, ret;
setup_pager();
- fd = open_kprobe_events(false);
-
- if (fd < 0)
- return fd;
ret = init_symbol_maps(false);
if (ret < 0)
return ret;
- ret = __show_perf_probe_events(fd, true);
- close(fd);
+ kp_fd = open_kprobe_events(false);
+ if (kp_fd >= 0) {
+ ret = __show_perf_probe_events(kp_fd, true);
+ close(kp_fd);
+ if (ret < 0)
+ goto out;
+ }
- fd = open_uprobe_events(false);
- if (fd >= 0) {
- ret = __show_perf_probe_events(fd, false);
- close(fd);
+ up_fd = open_uprobe_events(false);
+ if (kp_fd < 0 && up_fd < 0) {
+ print_both_open_warning(kp_fd, up_fd);
+ ret = kp_fd;
+ goto out;
}
+ if (up_fd >= 0) {
+ ret = __show_perf_probe_events(up_fd, false);
+ close(up_fd);
+ }
+out:
exit_symbol_maps();
return ret;
}
memset(&tev, 0, sizeof(tev));
rawlist = get_probe_trace_command_rawlist(fd);
+ if (!rawlist)
+ return NULL;
sl = strlist__new(true, NULL);
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
{
int ret = 0;
char *buf = synthesize_probe_trace_command(tev);
+ char sbuf[STRERR_BUFSIZE];
if (!buf) {
pr_debug("Failed to synthesize probe trace event.\n");
ret = write(fd, buf, strlen(buf));
if (ret <= 0)
pr_warning("Failed to write event: %s\n",
- strerror(errno));
+ strerror_r(errno, sbuf, sizeof(sbuf)));
}
free(buf);
return ret;
/* Try no suffix */
ret = e_snprintf(buf, len, "%s", base);
if (ret < 0) {
- pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ pr_debug("snprintf() failed: %d\n", ret);
return ret;
}
if (!strlist__has_entry(namelist, buf))
for (i = 1; i < MAX_EVENT_INDEX; i++) {
ret = e_snprintf(buf, len, "%s_%d", base, i);
if (ret < 0) {
- pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ pr_debug("snprintf() failed: %d\n", ret);
return ret;
}
if (!strlist__has_entry(namelist, buf))
else
fd = open_kprobe_events(true);
- if (fd < 0)
+ if (fd < 0) {
+ print_open_warning(fd, !pev->uprobes);
return fd;
+ }
+
/* Get current event names */
namelist = get_probe_trace_event_names(fd, false);
if (!namelist) {
}
ret = 0;
- printf("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
+ pr_info("Added new event%s\n", (ntevs > 1) ? "s:" : ":");
for (i = 0; i < ntevs; i++) {
tev = &tevs[i];
if (pev->event)
if (ret >= 0) {
/* Show how to use the event. */
- printf("\nYou can now use it in all perf tools, such as:\n\n");
- printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
+ pr_info("\nYou can now use it in all perf tools, such as:\n\n");
+ pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
tev->event);
}
goto error;
}
- printf("Removed event: %s\n", ent->s);
+ pr_info("Removed event: %s\n", ent->s);
return 0;
error:
- pr_warning("Failed to delete event: %s\n", strerror(-ret));
+ pr_warning("Failed to delete event: %s\n",
+ strerror_r(-ret, buf, sizeof(buf)));
return ret;
}
/* Get current event names */
kfd = open_kprobe_events(true);
- if (kfd < 0)
- return kfd;
+ if (kfd >= 0)
+ namelist = get_probe_trace_event_names(kfd, true);
- namelist = get_probe_trace_event_names(kfd, true);
ufd = open_uprobe_events(true);
-
if (ufd >= 0)
unamelist = get_probe_trace_event_names(ufd, true);
+ if (kfd < 0 && ufd < 0) {
+ print_both_open_warning(kfd, ufd);
+ goto error;
+ }
+
if (namelist == NULL && unamelist == NULL)
goto error;
projects / firefly-linux-kernel-4.4.55.git / blobdiff