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[Dle-develop] [tip:perf/core] perf probe: Use wrapper functions
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From: tip-bot f. M. H. <mhi...@re...> - 2010-03-17 11:28:51
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Commit-ID: 31facc5f1ac674fbcc29f212377e589396bb934c Gitweb: http://git.kernel.org/tip/31facc5f1ac674fbcc29f212377e589396bb934c Author: Masami Hiramatsu <mhi...@re...> AuthorDate: Tue, 16 Mar 2010 18:05:30 -0400 Committer: Ingo Molnar <mi...@el...> CommitDate: Wed, 17 Mar 2010 11:32:29 +0100 perf probe: Use wrapper functions Use wrapped functions as much as possible, to check out of memory conditions in perf probe. Signed-off-by: Masami Hiramatsu <mhi...@re...> Cc: systemtap <sys...@so...> Cc: DLE <dle...@li...> Cc: Frederic Weisbecker <fwe...@gm...> Cc: Arnaldo Carvalho de Melo <ac...@re...> Cc: Paul Mackerras <pa...@sa...> Cc: Mike Galbraith <ef...@gm...> Cc: Peter Zijlstra <a.p...@ch...> LKML-Reference: <20100316220530.32050.53951.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mi...@el...> --- tools/perf/builtin-probe.c | 4 +-- tools/perf/util/probe-event.c | 46 ++++++++++++++------------------------- tools/perf/util/probe-finder.c | 14 +++++------- 3 files changed, 24 insertions(+), 40 deletions(-) diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 152d6c9..b6afe7b 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -87,9 +87,7 @@ static void parse_probe_event_argv(int argc, const char **argv) len = 0; for (i = 0; i < argc; i++) len += strlen(argv[i]) + 1; - buf = zalloc(len + 1); - if (!buf) - die("Failed to allocate memory for binding arguments."); + buf = xzalloc(len + 1); len = 0; for (i = 0; i < argc; i++) len += sprintf(&buf[len], "%s ", argv[i]); diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 7c004b6..88a3b6d 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -33,6 +33,7 @@ #include <limits.h> #undef _GNU_SOURCE +#include "util.h" #include "event.h" #include "string.h" #include "strlist.h" @@ -90,9 +91,9 @@ void parse_line_range_desc(const char *arg, struct line_range *lr) if (*tmp != '\0') semantic_error("Tailing with invalid character '%d'.", *tmp); - tmp = strndup(arg, (ptr - arg)); + tmp = xstrndup(arg, (ptr - arg)); } else - tmp = strdup(arg); + tmp = xstrdup(arg); if (strchr(tmp, '.')) lr->file = tmp; @@ -135,7 +136,7 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) if (!check_event_name(arg)) semantic_error("%s is bad for event name -it must " "follow C symbol-naming rule.", arg); - pp->event = strdup(arg); + pp->event = xstrdup(arg); arg = tmp; } @@ -147,17 +148,16 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) /* Check arg is function or file and copy it */ if (strchr(arg, '.')) /* File */ - pp->file = strdup(arg); + pp->file = xstrdup(arg); else /* Function */ - pp->function = strdup(arg); - DIE_IF(pp->file == NULL && pp->function == NULL); + pp->function = xstrdup(arg); /* Parse other options */ while (ptr) { arg = ptr; c = nc; if (c == ';') { /* Lazy pattern must be the last part */ - pp->lazy_line = strdup(arg); + pp->lazy_line = xstrdup(arg); break; } ptr = strpbrk(arg, ";:+@%"); @@ -181,8 +181,7 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) case '@': /* File name */ if (pp->file) semantic_error("SRC@SRC is not allowed."); - pp->file = strdup(arg); - DIE_IF(pp->file == NULL); + pp->file = xstrdup(arg); break; case '%': /* Probe places */ if (strcmp(arg, "return") == 0) { @@ -247,11 +246,9 @@ void parse_perf_probe_event(const char *str, struct probe_point *pp, /* Copy arguments and ensure return probe has no C argument */ pp->nr_args = argc - 1; - pp->args = zalloc(sizeof(char *) * pp->nr_args); + pp->args = xzalloc(sizeof(char *) * pp->nr_args); for (i = 0; i < pp->nr_args; i++) { - pp->args[i] = strdup(argv[i + 1]); - if (!pp->args[i]) - die("Failed to copy argument."); + pp->args[i] = xstrdup(argv[i + 1]); if (is_c_varname(pp->args[i])) { if (pp->retprobe) semantic_error("You can't specify local" @@ -299,14 +296,12 @@ void parse_trace_kprobe_event(const char *str, struct probe_point *pp) pp->file = NULL; pp->nr_args = argc - 2; - pp->args = zalloc(sizeof(char *) * pp->nr_args); + pp->args = xzalloc(sizeof(char *) * pp->nr_args); for (i = 0; i < pp->nr_args; i++) { p = strchr(argv[i + 2], '='); if (p) /* We don't need which register is assigned. */ *p = '\0'; - pp->args[i] = strdup(argv[i + 2]); - if (!pp->args[i]) - die("Failed to copy argument."); + pp->args[i] = xstrdup(argv[i + 2]); } argv_free(argv); @@ -319,10 +314,8 @@ int synthesize_perf_probe_point(struct probe_point *pp) char offs[64] = "", line[64] = ""; int ret; - pp->probes[0] = buf = zalloc(MAX_CMDLEN); + pp->probes[0] = buf = xzalloc(MAX_CMDLEN); pp->found = 1; - if (!buf) - die("Failed to allocate memory by zalloc."); if (pp->offset) { ret = e_snprintf(offs, 64, "+%d", pp->offset); if (ret <= 0) @@ -380,9 +373,7 @@ int synthesize_trace_kprobe_event(struct probe_point *pp) char *buf; int i, len, ret; - pp->probes[0] = buf = zalloc(MAX_CMDLEN); - if (!buf) - die("Failed to allocate memory by zalloc."); + pp->probes[0] = buf = xzalloc(MAX_CMDLEN); ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset); if (ret <= 0) goto error; @@ -612,10 +603,9 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes, for (j = 0; j < nr_probes; j++) { pp = probes + j; if (!pp->event) - pp->event = strdup(pp->function); + pp->event = xstrdup(pp->function); if (!pp->group) - pp->group = strdup(PERFPROBE_GROUP); - DIE_IF(!pp->event || !pp->group); + pp->group = xstrdup(PERFPROBE_GROUP); /* If force_add is true, suffix search is allowed */ allow_suffix = force_add; for (i = 0; i < pp->found; i++) { @@ -709,9 +699,7 @@ void del_trace_kprobe_events(struct strlist *dellist) namelist = get_perf_event_names(fd, true); strlist__for_each(ent, dellist) { - str = strdup(ent->s); - if (!str) - die("Failed to copy event."); + str = xstrdup(ent->s); pr_debug("Parsing: %s\n", str); p = strchr(str, ':'); if (p) { diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index c171a24..e887bb6 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -125,8 +125,7 @@ static void line_list__add_line(struct list_head *head, unsigned int line) p = head; found: pr_debug("line list: add a line %u\n", line); - ln = zalloc(sizeof(struct line_node)); - DIE_IF(ln == NULL); + ln = xzalloc(sizeof(struct line_node)); ln->line = line; INIT_LIST_HEAD(&ln->list); list_add(&ln->list, p); @@ -416,7 +415,7 @@ static void show_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) (unsigned long)(pf->addr - eaddr)); /* Copy the function name if possible */ if (!pp->function) { - pp->function = strdup(name); + pp->function = xstrdup(name); pp->offset = (size_t)(pf->addr - eaddr); } } else { @@ -425,7 +424,7 @@ static void show_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) (uintmax_t)pf->addr); if (!pp->function) { /* TODO: Use _stext */ - pp->function = strdup(""); + pp->function = xstrdup(""); pp->offset = (size_t)pf->addr; } } @@ -456,7 +455,7 @@ static void show_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) if (pp->found == MAX_PROBES) die("Too many( > %d) probe point found.\n", MAX_PROBES); - pp->probes[pp->found] = strdup(tmp); + pp->probes[pp->found] = xstrdup(tmp); pp->found++; } @@ -506,8 +505,7 @@ static int find_lazy_match_lines(struct list_head *head, if (fd < 0) die("failed to open %s", fname); DIE_IF(fstat(fd, &st) < 0); - fbuf = malloc(st.st_size + 2); - DIE_IF(fbuf == NULL); + fbuf = xmalloc(st.st_size + 2); DIE_IF(read(fd, fbuf, st.st_size) < 0); close(fd); fbuf[st.st_size] = '\n'; /* Dummy line */ @@ -727,7 +725,7 @@ static void find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf) /* Copy real path */ if (!lf->lr->path) - lf->lr->path = strdup(src); + lf->lr->path = xstrdup(src); line_list__add_line(&lf->lr->line_list, (unsigned int)lineno); } /* Update status */ |
