bool probe_event_dry_run; /* Dry run flag */
-#define semantic_error(msg ...) die("Semantic error :" msg)
+#define semantic_error(msg ...) pr_err("Semantic error :" msg)
/* If there is no space to write, returns -E2BIG. */
static int e_snprintf(char *str, size_t size, const char *format, ...)
static struct map *kmaps[MAP__NR_TYPES];
/* Initialize symbol maps and path of vmlinux */
-static void init_vmlinux(void)
+static int init_vmlinux(void)
{
+ int ret;
+
symbol_conf.sort_by_name = true;
if (symbol_conf.vmlinux_name == NULL)
symbol_conf.try_vmlinux_path = true;
else
pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
- if (symbol__init() < 0)
- die("Failed to init symbol map.");
+ ret = symbol__init();
+ if (ret < 0) {
+ pr_debug("Failed to init symbol map.\n");
+ goto out;
+ }
map_groups__init(&kmap_groups);
- if (map_groups__create_kernel_maps(&kmap_groups, kmaps) < 0)
- die("Failed to create kernel maps.");
+ ret = map_groups__create_kernel_maps(&kmap_groups, kmaps);
+ if (ret < 0)
+ pr_debug("Failed to create kernel maps.\n");
+
+out:
+ if (ret < 0)
+ pr_warning("Failed to init vmlinux path.\n");
+ return ret;
}
#ifdef DWARF_SUPPORT
return open(kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
}
-static void convert_to_perf_probe_point(struct kprobe_trace_point *tp,
- struct perf_probe_point *pp)
+/* Convert trace point to probe point with debuginfo */
+static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
+ struct perf_probe_point *pp)
{
struct symbol *sym;
- int fd, ret = 0;
+ int fd, ret = -ENOENT;
sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION],
tp->symbol, NULL);
if (sym) {
fd = open_vmlinux();
- ret = find_perf_probe_point(fd, sym->start + tp->offset, pp);
- close(fd);
+ if (fd >= 0) {
+ ret = find_perf_probe_point(fd,
+ sym->start + tp->offset, pp);
+ close(fd);
+ }
}
if (ret <= 0) {
+ pr_debug("Failed to find corresponding probes from "
+ "debuginfo. Use kprobe event information.\n");
pp->function = xstrdup(tp->symbol);
pp->offset = tp->offset;
}
pp->retprobe = tp->retprobe;
+
+ return 0;
}
/* Try to find perf_probe_event with debuginfo */
fd = open_vmlinux();
if (fd < 0) {
- if (need_dwarf)
- die("Could not open debuginfo file.");
-
+ if (need_dwarf) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return fd;
+ }
pr_debug("Could not open vmlinux. Try to use symbols.\n");
return 0;
}
ntevs = find_kprobe_trace_events(fd, pev, tevs);
close(fd);
- if (ntevs > 0) /* Succeeded to find trace events */
+ if (ntevs > 0) { /* Succeeded to find trace events */
+ pr_debug("find %d kprobe_trace_events.\n", ntevs);
return ntevs;
+ }
- if (ntevs == 0) /* No error but failed to find probe point. */
- die("Probe point '%s' not found. - probe not added.",
- synthesize_perf_probe_point(&pev->point));
-
- /* Error path */
+ if (ntevs == 0) { /* No error but failed to find probe point. */
+ pr_warning("Probe point '%s' not found.\n",
+ synthesize_perf_probe_point(&pev->point));
+ return -ENOENT;
+ }
+ /* Error path : ntevs < 0 */
if (need_dwarf) {
if (ntevs == -EBADF)
pr_warning("No dwarf info found in the vmlinux - "
"please rebuild with CONFIG_DEBUG_INFO=y.\n");
- die("Failed to analyze debuginfo.");
+ return ntevs;
}
pr_debug("An error occurred in debuginfo analysis."
" Try to use symbols.\n");
return 0;
-
}
#define LINEBUF_SIZE 256
#define NR_ADDITIONAL_LINES 2
-static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
+static int show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
{
char buf[LINEBUF_SIZE];
const char *color = PERF_COLOR_BLUE;
color_fprintf(stdout, color, "%s", buf);
}
}
- return;
+
+ return 0;
error:
if (feof(fp))
- die("Source file is shorter than expected.");
+ pr_warning("Source file is shorter than expected.\n");
else
- die("File read error: %s", strerror(errno));
+ pr_warning("File read error: %s\n", strerror(errno));
+
+ return -1;
}
/*
* Show line-range always requires debuginfo to find source file and
* line number.
*/
-void show_line_range(struct line_range *lr)
+int show_line_range(struct line_range *lr)
{
unsigned int l = 1;
struct line_node *ln;
int fd, ret;
/* Search a line range */
- init_vmlinux();
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
+
fd = open_vmlinux();
- if (fd < 0)
- die("Could not open debuginfo file.");
+ if (fd < 0) {
+ pr_warning("Failed to open debuginfo file.\n");
+ return fd;
+ }
+
ret = find_line_range(fd, lr);
- if (ret <= 0)
- die("Source line is not found.\n");
close(fd);
+ if (ret == 0) {
+ pr_warning("Specified source line is not found.\n");
+ return -ENOENT;
+ } else if (ret < 0) {
+ pr_warning("Debuginfo analysis failed. (%d)\n", ret);
+ return ret;
+ }
setup_pager();
fprintf(stdout, "<%s:%d>\n", lr->file, lr->start);
fp = fopen(lr->path, "r");
- if (fp == NULL)
- die("Failed to open %s: %s", lr->path, strerror(errno));
+ if (fp == NULL) {
+ pr_warning("Failed to open %s: %s\n", lr->path,
+ strerror(errno));
+ return -errno;
+ }
/* Skip to starting line number */
- while (l < lr->start)
- show_one_line(fp, l++, true, false);
+ while (l < lr->start && ret >= 0)
+ ret = show_one_line(fp, l++, true, false);
+ if (ret < 0)
+ goto end;
list_for_each_entry(ln, &lr->line_list, list) {
- while (ln->line > l)
- show_one_line(fp, (l++) - lr->offset, false, false);
- show_one_line(fp, (l++) - lr->offset, false, true);
+ while (ln->line > l && ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset,
+ false, false);
+ if (ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset,
+ false, true);
+ if (ret < 0)
+ goto end;
}
if (lr->end == INT_MAX)
lr->end = l + NR_ADDITIONAL_LINES;
- while (l < lr->end && !feof(fp))
- show_one_line(fp, (l++) - lr->offset, false, false);
-
+ while (l < lr->end && !feof(fp) && ret >= 0)
+ ret = show_one_line(fp, (l++) - lr->offset, false, false);
+end:
fclose(fp);
+ return ret;
}
#else /* !DWARF_SUPPORT */
-static void convert_to_perf_probe_point(struct kprobe_trace_point *tp,
+static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
struct perf_probe_point *pp)
{
pp->function = xstrdup(tp->symbol);
pp->offset = tp->offset;
pp->retprobe = tp->retprobe;
+
+ return 0;
}
static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev,
struct kprobe_trace_event **tevs __unused)
{
- if (perf_probe_event_need_dwarf(pev))
- die("Debuginfo-analysis is not supported");
+ if (perf_probe_event_need_dwarf(pev)) {
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
+ }
return 0;
}
-void show_line_range(struct line_range *lr __unused)
+int show_line_range(struct line_range *lr __unused)
{
- die("Debuginfo-analysis is not supported");
+ pr_warning("Debuginfo-analysis is not supported.\n");
+ return -ENOSYS;
}
#endif
-void parse_line_range_desc(const char *arg, struct line_range *lr)
+int parse_line_range_desc(const char *arg, struct line_range *lr)
{
const char *ptr;
char *tmp;
else
lr->end = 0;
pr_debug("Line range is %u to %u\n", lr->start, lr->end);
- if (lr->end && lr->start > lr->end)
+ if (lr->end && lr->start > lr->end) {
semantic_error("Start line must be smaller"
- " than end line.");
- if (*tmp != '\0')
- semantic_error("Tailing with invalid character '%d'.",
+ " than end line.\n");
+ return -EINVAL;
+ }
+ if (*tmp != '\0') {
+ semantic_error("Tailing with invalid character '%d'.\n",
*tmp);
+ return -EINVAL;
+ }
tmp = xstrndup(arg, (ptr - arg));
} else
tmp = xstrdup(arg);
lr->file = tmp;
else
lr->function = tmp;
+
+ return 0;
}
/* Check the name is good for event/group */
}
/* Parse probepoint definition. */
-static void parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
+static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
{
struct perf_probe_point *pp = &pev->point;
char *ptr, *tmp;
if (ptr && *ptr == '=') { /* Event name */
*ptr = '\0';
tmp = ptr + 1;
- ptr = strchr(arg, ':');
- if (ptr) /* Group name is not supported yet. */
- semantic_error("Group name is not supported yet.");
- if (!check_event_name(arg))
+ if (strchr(arg, ':')) {
+ semantic_error("Group name is not supported yet.\n");
+ return -ENOTSUP;
+ }
+ if (!check_event_name(arg)) {
semantic_error("%s is bad for event name -it must "
- "follow C symbol-naming rule.", arg);
+ "follow C symbol-naming rule.\n", arg);
+ return -EINVAL;
+ }
pev->event = xstrdup(arg);
pev->group = NULL;
arg = tmp;
switch (c) {
case ':': /* Line number */
pp->line = strtoul(arg, &tmp, 0);
- if (*tmp != '\0')
+ if (*tmp != '\0') {
semantic_error("There is non-digit char"
- " in line number.");
+ " in line number.\n");
+ return -EINVAL;
+ }
break;
case '+': /* Byte offset from a symbol */
pp->offset = strtoul(arg, &tmp, 0);
- if (*tmp != '\0')
+ if (*tmp != '\0') {
semantic_error("There is non-digit character"
- " in offset.");
+ " in offset.\n");
+ return -EINVAL;
+ }
break;
case '@': /* File name */
- if (pp->file)
- semantic_error("SRC@SRC is not allowed.");
+ if (pp->file) {
+ semantic_error("SRC@SRC is not allowed.\n");
+ return -EINVAL;
+ }
pp->file = xstrdup(arg);
break;
case '%': /* Probe places */
if (strcmp(arg, "return") == 0) {
pp->retprobe = 1;
- } else /* Others not supported yet */
- semantic_error("%%%s is not supported.", arg);
+ } else { /* Others not supported yet */
+ semantic_error("%%%s is not supported.\n", arg);
+ return -ENOTSUP;
+ }
break;
- default:
- DIE_IF("Program has a bug.");
+ default: /* Buggy case */
+ pr_err("This program has a bug at %s:%d.\n",
+ __FILE__, __LINE__);
+ return -ENOTSUP;
break;
}
}
/* Exclusion check */
- if (pp->lazy_line && pp->line)
+ if (pp->lazy_line && pp->line) {
semantic_error("Lazy pattern can't be used with line number.");
+ return -EINVAL;
+ }
- if (pp->lazy_line && pp->offset)
+ if (pp->lazy_line && pp->offset) {
semantic_error("Lazy pattern can't be used with offset.");
+ return -EINVAL;
+ }
- if (pp->line && pp->offset)
+ if (pp->line && pp->offset) {
semantic_error("Offset can't be used with line number.");
+ return -EINVAL;
+ }
- if (!pp->line && !pp->lazy_line && pp->file && !pp->function)
+ if (!pp->line && !pp->lazy_line && pp->file && !pp->function) {
semantic_error("File always requires line number or "
"lazy pattern.");
+ return -EINVAL;
+ }
- if (pp->offset && !pp->function)
+ if (pp->offset && !pp->function) {
semantic_error("Offset requires an entry function.");
+ return -EINVAL;
+ }
- if (pp->retprobe && !pp->function)
+ if (pp->retprobe && !pp->function) {
semantic_error("Return probe requires an entry function.");
+ return -EINVAL;
+ }
- if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe)
+ if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) {
semantic_error("Offset/Line/Lazy pattern can't be used with "
"return probe.");
+ return -EINVAL;
+ }
pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n",
pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
pp->lazy_line);
+ return 0;
}
/* Parse perf-probe event argument */
-static void parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
+static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
{
char *tmp;
struct perf_probe_arg_field **fieldp;
/* A variable, register, symbol or special value */
arg->var = xstrdup(str);
pr_debug("%s\n", arg->var);
- return;
+ return 0;
}
/* Structure fields */
} else if (tmp[1] == '>') {
str = tmp + 2;
(*fieldp)->ref = true;
- } else
- semantic_error("Argument parse error: %s", str);
+ } else {
+ semantic_error("Argument parse error: %s\n", str);
+ return -EINVAL;
+ }
tmp = strpbrk(str, "-.");
if (tmp) {
/* If no name is specified, set the last field name */
if (!arg->name)
arg->name = xstrdup((*fieldp)->name);
+
+ return 0;
}
/* Parse perf-probe event command */
-void parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
+int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
{
char **argv;
- int argc, i;
+ int argc, i, ret = 0;
argv = argv_split(cmd, &argc);
- if (!argv)
- die("argv_split failed.");
- if (argc > MAX_PROBE_ARGS + 1)
- semantic_error("Too many arguments");
-
+ if (!argv) {
+ pr_debug("Failed to split arguments.\n");
+ return -ENOMEM;
+ }
+ if (argc - 1 > MAX_PROBE_ARGS) {
+ semantic_error("Too many probe arguments (%d).\n", argc - 1);
+ ret = -ERANGE;
+ goto out;
+ }
/* Parse probe point */
- parse_perf_probe_point(argv[0], pev);
+ ret = parse_perf_probe_point(argv[0], pev);
+ if (ret < 0)
+ goto out;
/* Copy arguments and ensure return probe has no C argument */
pev->nargs = argc - 1;
pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs);
- for (i = 0; i < pev->nargs; i++) {
- parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
- if (is_c_varname(pev->args[i].var) && pev->point.retprobe)
+ for (i = 0; i < pev->nargs && ret >= 0; i++) {
+ ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]);
+ if (ret >= 0 &&
+ is_c_varname(pev->args[i].var) && pev->point.retprobe) {
semantic_error("You can't specify local variable for"
- " kretprobe");
+ " kretprobe.\n");
+ ret = -EINVAL;
+ }
}
-
+out:
argv_free(argv);
+
+ return ret;
}
/* Return true if this perf_probe_event requires debuginfo */
}
/* Parse kprobe_events event into struct probe_point */
-void parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev)
+int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev)
{
struct kprobe_trace_point *tp = &tev->point;
char pr;
pr_debug("Parsing kprobe_events: %s\n", cmd);
argv = argv_split(cmd, &argc);
- if (!argv)
- die("argv_split failed.");
- if (argc < 2)
- semantic_error("Too less arguments.");
+ if (!argv) {
+ pr_debug("Failed to split arguments.\n");
+ return -ENOMEM;
+ }
+ if (argc < 2) {
+ semantic_error("Too few probe arguments.\n");
+ ret = -ERANGE;
+ goto out;
+ }
/* Scan event and group name. */
ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
&pr, (float *)(void *)&tev->group,
(float *)(void *)&tev->event);
- if (ret != 3)
- semantic_error("Failed to parse event name: %s", argv[0]);
+ if (ret != 3) {
+ semantic_error("Failed to parse event name: %s\n", argv[0]);
+ ret = -EINVAL;
+ goto out;
+ }
pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
tp->retprobe = (pr == 'r');
/* TODO: parse regs and offset */
tev->args[i].value = xstrdup(p);
}
-
+ ret = 0;
+out:
argv_free(argv);
+ return ret;
}
/* Compose only probe arg */
return tmp - buf;
error:
- die("Failed to synthesize perf probe argument: %s", strerror(-ret));
+ pr_debug("Failed to synthesize perf probe argument: %s",
+ strerror(-ret));
+ return ret;
}
/* Compose only probe point (not argument) */
return buf;
error:
- die("Failed to synthesize perf probe point: %s", strerror(-ret));
+ pr_debug("Failed to synthesize perf probe point: %s",
+ strerror(-ret));
+ free(buf);
+ return NULL;
}
#if 0
return NULL;
}
-void convert_to_perf_probe_event(struct kprobe_trace_event *tev,
- struct perf_probe_event *pev)
+int convert_to_perf_probe_event(struct kprobe_trace_event *tev,
+ struct perf_probe_event *pev)
{
char buf[64];
- int i;
+ int i, ret;
/* Convert event/group name */
pev->event = xstrdup(tev->event);
pev->group = xstrdup(tev->group);
/* Convert trace_point to probe_point */
- convert_to_perf_probe_point(&tev->point, &pev->point);
+ ret = convert_to_perf_probe_point(&tev->point, &pev->point);
+ if (ret < 0)
+ return ret;
/* Convert trace_arg to probe_arg */
pev->nargs = tev->nargs;
pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs);
- for (i = 0; i < tev->nargs; i++)
+ for (i = 0; i < tev->nargs && ret >= 0; i++)
if (tev->args[i].name)
pev->args[i].name = xstrdup(tev->args[i].name);
else {
- synthesize_kprobe_trace_arg(&tev->args[i], buf, 64);
+ ret = synthesize_kprobe_trace_arg(&tev->args[i],
+ buf, 64);
pev->args[i].name = xstrdup(buf);
}
+
+ if (ret < 0)
+ clear_perf_probe_event(pev);
+
+ return ret;
}
void clear_perf_probe_event(struct perf_probe_event *pev)
int ret;
ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
- if (ret < 0)
- die("Failed to make kprobe_events path.");
-
- if (readwrite && !probe_event_dry_run)
- ret = open(buf, O_RDWR, O_APPEND);
- else
- ret = open(buf, O_RDONLY, 0);
+ if (ret >= 0) {
+ if (readwrite && !probe_event_dry_run)
+ ret = open(buf, O_RDWR, O_APPEND);
+ else
+ ret = open(buf, O_RDONLY, 0);
+ }
if (ret < 0) {
if (errno == ENOENT)
- die("kprobe_events file does not exist -"
- " please rebuild with CONFIG_KPROBE_EVENT.");
+ pr_warning("kprobe_events file does not exist - please"
+ " rebuild kernel with CONFIG_KPROBE_EVENT.\n");
else
- die("Could not open kprobe_events file: %s",
- strerror(errno));
+ pr_warning("Failed to open kprobe_events file: %s\n",
+ strerror(errno));
}
return ret;
}
if (p[idx] == '\n')
p[idx] = '\0';
ret = strlist__add(sl, buf);
- if (ret < 0)
- die("strlist__add failed: %s", strerror(-ret));
+ if (ret < 0) {
+ pr_debug("strlist__add failed: %s\n", strerror(-ret));
+ strlist__delete(sl);
+ return NULL;
+ }
}
fclose(fp);
}
/* Show an event */
-static void show_perf_probe_event(struct perf_probe_event *pev)
+static int show_perf_probe_event(struct perf_probe_event *pev)
{
int i, ret;
char buf[128];
/* Synthesize only event probe point */
place = synthesize_perf_probe_point(&pev->point);
+ if (!place)
+ return -EINVAL;
ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
if (ret < 0)
- die("Failed to copy event: %s", strerror(-ret));
+ return ret;
+
printf(" %-20s (on %s", buf, place);
if (pev->nargs > 0) {
printf(" with");
for (i = 0; i < pev->nargs; i++) {
- synthesize_perf_probe_arg(&pev->args[i], buf, 128);
+ ret = synthesize_perf_probe_arg(&pev->args[i],
+ buf, 128);
+ if (ret < 0)
+ break;
printf(" %s", buf);
}
}
printf(")\n");
free(place);
+ return ret;
}
/* List up current perf-probe events */
-void show_perf_probe_events(void)
+int show_perf_probe_events(void)
{
- int fd;
+ int fd, ret;
struct kprobe_trace_event tev;
struct perf_probe_event pev;
struct strlist *rawlist;
struct str_node *ent;
setup_pager();
- init_vmlinux();
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
memset(&tev, 0, sizeof(tev));
memset(&pev, 0, sizeof(pev));
fd = open_kprobe_events(false);
+ if (fd < 0)
+ return fd;
+
rawlist = get_kprobe_trace_command_rawlist(fd);
close(fd);
+ if (!rawlist)
+ return -ENOENT;
strlist__for_each(ent, rawlist) {
- parse_kprobe_trace_command(ent->s, &tev);
- convert_to_perf_probe_event(&tev, &pev);
- /* Show an event */
- show_perf_probe_event(&pev);
+ ret = parse_kprobe_trace_command(ent->s, &tev);
+ if (ret >= 0) {
+ ret = convert_to_perf_probe_event(&tev, &pev);
+ if (ret >= 0)
+ ret = show_perf_probe_event(&pev);
+ }
clear_perf_probe_event(&pev);
clear_kprobe_trace_event(&tev);
+ if (ret < 0)
+ break;
}
-
strlist__delete(rawlist);
+
+ return ret;
}
/* Get current perf-probe event names */
struct strlist *sl, *rawlist;
struct str_node *ent;
struct kprobe_trace_event tev;
+ int ret = 0;
memset(&tev, 0, sizeof(tev));
rawlist = get_kprobe_trace_command_rawlist(fd);
sl = strlist__new(true, NULL);
strlist__for_each(ent, rawlist) {
- parse_kprobe_trace_command(ent->s, &tev);
+ ret = parse_kprobe_trace_command(ent->s, &tev);
+ if (ret < 0)
+ break;
if (include_group) {
- if (e_snprintf(buf, 128, "%s:%s", tev.group,
- tev.event) < 0)
- die("Failed to copy group:event name.");
- strlist__add(sl, buf);
+ ret = e_snprintf(buf, 128, "%s:%s", tev.group,
+ tev.event);
+ if (ret >= 0)
+ ret = strlist__add(sl, buf);
} else
- strlist__add(sl, tev.event);
+ ret = strlist__add(sl, tev.event);
clear_kprobe_trace_event(&tev);
+ if (ret < 0)
+ break;
}
-
strlist__delete(rawlist);
+ if (ret < 0) {
+ strlist__delete(sl);
+ return NULL;
+ }
return sl;
}
-static void write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
+static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
{
int ret;
char *buf = synthesize_kprobe_trace_command(tev);
+ if (!buf) {
+ pr_debug("Failed to synthesize kprobe trace event.\n");
+ return -EINVAL;
+ }
+
pr_debug("Writing event: %s\n", buf);
if (!probe_event_dry_run) {
ret = write(fd, buf, strlen(buf));
if (ret <= 0)
- die("Failed to write event: %s", strerror(errno));
+ pr_warning("Failed to write event: %s\n",
+ strerror(errno));
}
free(buf);
+ return ret;
}
-static void get_new_event_name(char *buf, size_t len, const char *base,
- struct strlist *namelist, bool allow_suffix)
+static int get_new_event_name(char *buf, size_t len, const char *base,
+ struct strlist *namelist, bool allow_suffix)
{
int i, ret;
/* Try no suffix */
ret = e_snprintf(buf, len, "%s", base);
- if (ret < 0)
- die("snprintf() failed: %s", strerror(-ret));
+ if (ret < 0) {
+ pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ return ret;
+ }
if (!strlist__has_entry(namelist, buf))
- return;
+ return 0;
if (!allow_suffix) {
pr_warning("Error: event \"%s\" already exists. "
"(Use -f to force duplicates.)\n", base);
- die("Can't add new event.");
+ return -EEXIST;
}
/* Try to add suffix */
for (i = 1; i < MAX_EVENT_INDEX; i++) {
ret = e_snprintf(buf, len, "%s_%d", base, i);
- if (ret < 0)
- die("snprintf() failed: %s", strerror(-ret));
+ if (ret < 0) {
+ pr_debug("snprintf() failed: %s\n", strerror(-ret));
+ return ret;
+ }
if (!strlist__has_entry(namelist, buf))
break;
}
- if (i == MAX_EVENT_INDEX)
- die("Too many events are on the same function.");
+ if (i == MAX_EVENT_INDEX) {
+ pr_warning("Too many events are on the same function.\n");
+ ret = -ERANGE;
+ }
+
+ return ret;
}
-static void __add_kprobe_trace_events(struct perf_probe_event *pev,
- struct kprobe_trace_event *tevs,
- int ntevs, bool allow_suffix)
+static int __add_kprobe_trace_events(struct perf_probe_event *pev,
+ struct kprobe_trace_event *tevs,
+ int ntevs, bool allow_suffix)
{
- int i, fd;
+ int i, fd, ret;
struct kprobe_trace_event *tev = NULL;
char buf[64];
const char *event, *group;
struct strlist *namelist;
fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
/* Get current event names */
namelist = get_kprobe_trace_event_names(fd, false);
+ if (!namelist) {
+ pr_debug("Failed to get current event list.\n");
+ return -EIO;
+ }
+ ret = 0;
printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":");
- for (i = 0; i < ntevs; i++) {
+ for (i = 0; i < ntevs && ret >= 0; i++) {
tev = &tevs[i];
if (pev->event)
event = pev->event;
group = PERFPROBE_GROUP;
/* Get an unused new event name */
- get_new_event_name(buf, 64, event, namelist, allow_suffix);
+ ret = get_new_event_name(buf, 64, event,
+ namelist, allow_suffix);
+ if (ret < 0)
+ break;
event = buf;
tev->event = xstrdup(event);
tev->group = xstrdup(group);
- write_kprobe_trace_event(fd, tev);
+ ret = write_kprobe_trace_event(fd, tev);
+ if (ret < 0)
+ break;
/* Add added event name to namelist */
strlist__add(namelist, event);
*/
allow_suffix = true;
}
- /* Show how to use the event. */
- printf("\nYou can now use it on all perf tools, such as:\n\n");
- printf("\tperf record -e %s:%s -a sleep 1\n\n", tev->group, tev->event);
+
+ if (ret >= 0) {
+ /* Show how to use the event. */
+ printf("\nYou can now use it on all perf tools, such as:\n\n");
+ printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group,
+ tev->event);
+ }
strlist__delete(namelist);
close(fd);
+ return ret;
}
static int convert_to_kprobe_trace_events(struct perf_probe_event *pev,
/* Convert perf_probe_event with debuginfo */
ntevs = try_to_find_kprobe_trace_events(pev, tevs);
- if (ntevs > 0)
+ if (ntevs != 0)
return ntevs;
/* Allocate trace event buffer */
/* Currently just checking function name from symbol map */
sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION],
tev->point.symbol, NULL);
- if (!sym)
- die("Kernel symbol \'%s\' not found - probe not added.",
- tev->point.symbol);
-
+ if (!sym) {
+ pr_warning("Kernel symbol \'%s\' not found.\n",
+ tev->point.symbol);
+ return -ENOENT;
+ }
return ntevs;
}
int ntevs;
};
-void add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
- bool force_add)
+int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
+ bool force_add)
{
- int i;
+ int i, j, ret;
struct __event_package *pkgs;
pkgs = xzalloc(sizeof(struct __event_package) * npevs);
/* Init vmlinux path */
- init_vmlinux();
+ ret = init_vmlinux();
+ if (ret < 0)
+ return ret;
/* Loop 1: convert all events */
for (i = 0; i < npevs; i++) {
pkgs[i].pev = &pevs[i];
/* Convert with or without debuginfo */
- pkgs[i].ntevs = convert_to_kprobe_trace_events(pkgs[i].pev,
- &pkgs[i].tevs);
+ ret = convert_to_kprobe_trace_events(pkgs[i].pev,
+ &pkgs[i].tevs);
+ if (ret < 0)
+ goto end;
+ pkgs[i].ntevs = ret;
}
/* Loop 2: add all events */
+ for (i = 0; i < npevs && ret >= 0; i++)
+ ret = __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs,
+ pkgs[i].ntevs, force_add);
+end:
+ /* Loop 3: cleanup trace events */
for (i = 0; i < npevs; i++)
- __add_kprobe_trace_events(pkgs[i].pev, pkgs[i].tevs,
- pkgs[i].ntevs, force_add);
- /* TODO: cleanup all trace events? */
+ for (j = 0; j < pkgs[i].ntevs; j++)
+ clear_kprobe_trace_event(&pkgs[i].tevs[j]);
+
+ return ret;
}
-static void __del_trace_kprobe_event(int fd, struct str_node *ent)
+static int __del_trace_kprobe_event(int fd, struct str_node *ent)
{
char *p;
char buf[128];
int ret;
/* Convert from perf-probe event to trace-kprobe event */
- if (e_snprintf(buf, 128, "-:%s", ent->s) < 0)
- die("Failed to copy event.");
+ ret = e_snprintf(buf, 128, "-:%s", ent->s);
+ if (ret < 0)
+ goto error;
+
p = strchr(buf + 2, ':');
- if (!p)
- die("Internal error: %s should have ':' but not.", ent->s);
+ if (!p) {
+ pr_debug("Internal error: %s should have ':' but not.\n",
+ ent->s);
+ ret = -ENOTSUP;
+ goto error;
+ }
*p = '/';
pr_debug("Writing event: %s\n", buf);
ret = write(fd, buf, strlen(buf));
- if (ret <= 0)
- die("Failed to write event: %s", strerror(errno));
+ if (ret < 0)
+ goto error;
+
printf("Remove event: %s\n", ent->s);
+ return 0;
+error:
+ pr_warning("Failed to delete event: %s\n", strerror(-ret));
+ return ret;
}
-static void del_trace_kprobe_event(int fd, const char *group,
- const char *event, struct strlist *namelist)
+static int del_trace_kprobe_event(int fd, const char *group,
+ const char *event, struct strlist *namelist)
{
char buf[128];
struct str_node *ent, *n;
- int found = 0;
+ int found = 0, ret = 0;
- if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
- die("Failed to copy event.");
+ ret = e_snprintf(buf, 128, "%s:%s", group, event);
+ if (ret < 0) {
+ pr_err("Failed to copy event.");
+ return ret;
+ }
if (strpbrk(buf, "*?")) { /* Glob-exp */
strlist__for_each_safe(ent, n, namelist)
if (strglobmatch(ent->s, buf)) {
found++;
- __del_trace_kprobe_event(fd, ent);
+ ret = __del_trace_kprobe_event(fd, ent);
+ if (ret < 0)
+ break;
strlist__remove(namelist, ent);
}
} else {
ent = strlist__find(namelist, buf);
if (ent) {
found++;
- __del_trace_kprobe_event(fd, ent);
- strlist__remove(namelist, ent);
+ ret = __del_trace_kprobe_event(fd, ent);
+ if (ret >= 0)
+ strlist__remove(namelist, ent);
}
}
- if (found == 0)
- pr_info("Info: event \"%s\" does not exist, could not remove it.\n", buf);
+ if (found == 0 && ret >= 0)
+ pr_info("Info: Event \"%s\" does not exist.\n", buf);
+
+ return ret;
}
-void del_perf_probe_events(struct strlist *dellist)
+int del_perf_probe_events(struct strlist *dellist)
{
- int fd;
+ int fd, ret = 0;
const char *group, *event;
char *p, *str;
struct str_node *ent;
struct strlist *namelist;
fd = open_kprobe_events(true);
+ if (fd < 0)
+ return fd;
+
/* Get current event names */
namelist = get_kprobe_trace_event_names(fd, true);
+ if (namelist == NULL)
+ return -EINVAL;
strlist__for_each(ent, dellist) {
str = xstrdup(ent->s);
event = str;
}
pr_debug("Group: %s, Event: %s\n", group, event);
- del_trace_kprobe_event(fd, group, event, namelist);
+ ret = del_trace_kprobe_event(fd, group, event, namelist);
free(str);
+ if (ret < 0)
+ break;
}
strlist__delete(namelist);
close(fd);
+
+ return ret;
}
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff