diff options
| -rw-r--r-- | tools/perf/builtin-probe.c | 20 | ||||
| -rw-r--r-- | tools/perf/util/probe-finder.c | 2 |
2 files changed, 14 insertions, 8 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 81245238e34..65bcaed0ef4 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -294,10 +294,11 @@ static int write_new_event(int fd, const char *buf) { int ret; - printf("Adding new event: %s\n", buf); ret = write(fd, buf, strlen(buf)); if (ret <= 0) - die("failed to create event."); + die("Failed to create event."); + else + printf("Added new event: %s\n", buf); return ret; } @@ -310,7 +311,7 @@ static int synthesize_probe_event(struct probe_point *pp) int i, len, ret; pp->probes[0] = buf = (char *)calloc(MAX_CMDLEN, sizeof(char)); if (!buf) - die("calloc"); + die("Failed to allocate memory by calloc."); ret = snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset); if (ret <= 0 || ret >= MAX_CMDLEN) goto error; @@ -363,7 +364,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) if (ret == -E2BIG) semantic_error("probe point is too long."); else if (ret < 0) - die("snprintf"); + die("Failed to synthesize a probe point."); } #ifndef NO_LIBDWARF @@ -375,7 +376,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) else fd = open_default_vmlinux(); if (fd < 0) - die("vmlinux/module file open"); + die("Could not open vmlinux/module file."); /* Searching probe points */ for (j = 0; j < session.nr_probe; j++) { @@ -396,8 +397,13 @@ setup_probes: /* Settng up probe points */ snprintf(buf, MAX_CMDLEN, "%s/../kprobe_events", debugfs_path); fd = open(buf, O_WRONLY, O_APPEND); - if (fd < 0) - die("kprobe_events open"); + if (fd < 0) { + if (errno == ENOENT) + die("kprobe_events file does not exist - please rebuild with CONFIG_KPROBE_TRACER."); + else + die("Could not open kprobe_events file: %s", + strerror(errno)); + } for (j = 0; j < session.nr_probe; j++) { pp = &session.probes[j]; if (pp->found == 1) { diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index db96186e02a..35d5a69aaf9 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -688,7 +688,7 @@ int find_probepoint(int fd, struct probe_point *pp) ret = dwarf_init(fd, DW_DLC_READ, 0, 0, &__dw_debug, &__dw_error); if (ret != DW_DLV_OK) - die("Failed to call dwarf_init(). Maybe, not a dwarf file.\n"); + die("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO.\n"); pp->found = 0; while (++cu_number) { |