mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
perf probe: Remove xstrdup()/xstrndup() from util/probe-{event, finder}.c
Remove all xstr*dup() calls from util/probe-{event,finder}.c since it may cause 'sudden death' in utility functions and it makes reusing it from other code difficult. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100412171756.3790.89607.stgit@localhost6.localdomain6> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
e334016f1d
commit
02b95dadc8
2 changed files with 156 additions and 61 deletions
|
@ -133,7 +133,9 @@ static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
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if (ret <= 0) {
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pr_debug("Failed to find corresponding probes from "
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"debuginfo. Use kprobe event information.\n");
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pp->function = xstrdup(tp->symbol);
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pp->function = strdup(tp->symbol);
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if (pp->function == NULL)
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return -ENOMEM;
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pp->offset = tp->offset;
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}
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pp->retprobe = tp->retprobe;
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@ -300,7 +302,9 @@ int show_line_range(struct line_range *lr)
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static int convert_to_perf_probe_point(struct kprobe_trace_point *tp,
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struct perf_probe_point *pp)
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{
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pp->function = xstrdup(tp->symbol);
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pp->function = strdup(tp->symbol);
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if (pp->function == NULL)
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return -ENOMEM;
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pp->offset = tp->offset;
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pp->retprobe = tp->retprobe;
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@ -355,9 +359,12 @@ int parse_line_range_desc(const char *arg, struct line_range *lr)
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*tmp);
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return -EINVAL;
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}
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tmp = xstrndup(arg, (ptr - arg));
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tmp = strndup(arg, (ptr - arg));
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} else
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tmp = xstrdup(arg);
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tmp = strdup(arg);
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if (tmp == NULL)
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return -ENOMEM;
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if (strchr(tmp, '.'))
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lr->file = tmp;
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@ -406,7 +413,9 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
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"follow C symbol-naming rule.\n", arg);
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return -EINVAL;
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}
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pev->event = xstrdup(arg);
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pev->event = strdup(arg);
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if (pev->event == NULL)
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return -ENOMEM;
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pev->group = NULL;
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arg = tmp;
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}
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@ -417,18 +426,24 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
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*ptr++ = '\0';
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}
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tmp = strdup(arg);
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if (tmp == NULL)
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return -ENOMEM;
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/* Check arg is function or file and copy it */
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if (strchr(arg, '.')) /* File */
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pp->file = xstrdup(arg);
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if (strchr(tmp, '.')) /* File */
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pp->file = tmp;
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else /* Function */
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pp->function = xstrdup(arg);
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pp->function = tmp;
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/* Parse other options */
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while (ptr) {
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arg = ptr;
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c = nc;
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if (c == ';') { /* Lazy pattern must be the last part */
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pp->lazy_line = xstrdup(arg);
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pp->lazy_line = strdup(arg);
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if (pp->lazy_line == NULL)
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return -ENOMEM;
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break;
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}
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ptr = strpbrk(arg, ";:+@%");
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@ -458,7 +473,9 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
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semantic_error("SRC@SRC is not allowed.\n");
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return -EINVAL;
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}
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pp->file = xstrdup(arg);
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pp->file = strdup(arg);
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if (pp->file == NULL)
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return -ENOMEM;
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break;
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case '%': /* Probe places */
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if (strcmp(arg, "return") == 0) {
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@ -530,7 +547,9 @@ static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
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tmp = strchr(str, '=');
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if (tmp) {
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arg->name = xstrndup(str, tmp - str);
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arg->name = strndup(str, tmp - str);
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if (arg->name == NULL)
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return -ENOMEM;
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pr_debug("name:%s ", arg->name);
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str = tmp + 1;
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}
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@ -538,20 +557,26 @@ static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
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tmp = strchr(str, ':');
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if (tmp) { /* Type setting */
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*tmp = '\0';
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arg->type = xstrdup(tmp + 1);
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arg->type = strdup(tmp + 1);
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if (arg->type == NULL)
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return -ENOMEM;
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pr_debug("type:%s ", arg->type);
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}
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tmp = strpbrk(str, "-.");
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if (!is_c_varname(str) || !tmp) {
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/* A variable, register, symbol or special value */
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arg->var = xstrdup(str);
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arg->var = strdup(str);
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if (arg->var == NULL)
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return -ENOMEM;
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pr_debug("%s\n", arg->var);
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return 0;
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}
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/* Structure fields */
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arg->var = xstrndup(str, tmp - str);
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arg->var = strndup(str, tmp - str);
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if (arg->var == NULL)
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return -ENOMEM;
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pr_debug("%s, ", arg->var);
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fieldp = &arg->field;
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@ -572,18 +597,24 @@ static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg)
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tmp = strpbrk(str, "-.");
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if (tmp) {
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(*fieldp)->name = xstrndup(str, tmp - str);
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(*fieldp)->name = strndup(str, tmp - str);
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if ((*fieldp)->name == NULL)
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return -ENOMEM;
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pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref);
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fieldp = &(*fieldp)->next;
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}
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} while (tmp);
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(*fieldp)->name = xstrdup(str);
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(*fieldp)->name = strdup(str);
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if ((*fieldp)->name == NULL)
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return -ENOMEM;
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pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
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/* If no name is specified, set the last field name */
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if (!arg->name)
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arg->name = xstrdup((*fieldp)->name);
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if (!arg->name) {
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arg->name = strdup((*fieldp)->name);
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if (arg->name == NULL)
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return -ENOMEM;
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}
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return 0;
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}
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@ -697,9 +728,13 @@ int parse_kprobe_trace_command(const char *cmd, struct kprobe_trace_event *tev)
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*p++ = '\0';
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else
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p = argv[i + 2];
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tev->args[i].name = xstrdup(argv[i + 2]);
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tev->args[i].name = strdup(argv[i + 2]);
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/* TODO: parse regs and offset */
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tev->args[i].value = xstrdup(p);
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tev->args[i].value = strdup(p);
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if (tev->args[i].name == NULL || tev->args[i].value == NULL) {
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ret = -ENOMEM;
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goto out;
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}
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}
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ret = 0;
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out:
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@ -933,12 +968,14 @@ char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev)
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int convert_to_perf_probe_event(struct kprobe_trace_event *tev,
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struct perf_probe_event *pev)
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{
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char buf[64];
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char buf[64] = "";
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int i, ret;
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/* Convert event/group name */
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pev->event = xstrdup(tev->event);
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pev->group = xstrdup(tev->group);
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pev->event = strdup(tev->event);
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pev->group = strdup(tev->group);
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if (pev->event == NULL || pev->group == NULL)
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return -ENOMEM;
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/* Convert trace_point to probe_point */
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ret = convert_to_perf_probe_point(&tev->point, &pev->point);
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@ -950,14 +987,17 @@ int convert_to_perf_probe_event(struct kprobe_trace_event *tev,
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pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs);
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if (pev->args == NULL)
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return -ENOMEM;
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for (i = 0; i < tev->nargs && ret >= 0; i++)
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for (i = 0; i < tev->nargs && ret >= 0; i++) {
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if (tev->args[i].name)
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pev->args[i].name = xstrdup(tev->args[i].name);
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pev->args[i].name = strdup(tev->args[i].name);
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else {
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ret = synthesize_kprobe_trace_arg(&tev->args[i],
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buf, 64);
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pev->args[i].name = xstrdup(buf);
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pev->args[i].name = strdup(buf);
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}
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if (pev->args[i].name == NULL && ret >= 0)
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ret = -ENOMEM;
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}
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if (ret < 0)
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clear_perf_probe_event(pev);
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@ -1282,7 +1322,7 @@ static int __add_kprobe_trace_events(struct perf_probe_event *pev,
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ret = 0;
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printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":");
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for (i = 0; i < ntevs && ret >= 0; i++) {
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for (i = 0; i < ntevs; i++) {
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tev = &tevs[i];
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if (pev->event)
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event = pev->event;
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@ -1303,8 +1343,12 @@ static int __add_kprobe_trace_events(struct perf_probe_event *pev,
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break;
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event = buf;
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tev->event = xstrdup(event);
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tev->group = xstrdup(group);
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tev->event = strdup(event);
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tev->group = strdup(group);
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if (tev->event == NULL || tev->group == NULL) {
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ret = -ENOMEM;
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break;
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}
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ret = write_kprobe_trace_event(fd, tev);
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if (ret < 0)
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break;
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@ -1360,23 +1404,40 @@ static int convert_to_kprobe_trace_events(struct perf_probe_event *pev,
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return -ENOMEM;
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/* Copy parameters */
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tev->point.symbol = xstrdup(pev->point.function);
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tev->point.symbol = strdup(pev->point.function);
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if (tev->point.symbol == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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tev->point.offset = pev->point.offset;
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tev->nargs = pev->nargs;
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if (tev->nargs) {
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tev->args = zalloc(sizeof(struct kprobe_trace_arg)
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* tev->nargs);
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if (tev->args == NULL) {
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free(tev);
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*tevs = NULL;
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return -ENOMEM;
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ret = -ENOMEM;
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goto error;
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}
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for (i = 0; i < tev->nargs; i++) {
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if (pev->args[i].name)
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tev->args[i].name = xstrdup(pev->args[i].name);
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tev->args[i].value = xstrdup(pev->args[i].var);
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if (pev->args[i].type)
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tev->args[i].type = xstrdup(pev->args[i].type);
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if (pev->args[i].name) {
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tev->args[i].name = strdup(pev->args[i].name);
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if (tev->args[i].name == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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}
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tev->args[i].value = strdup(pev->args[i].var);
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if (tev->args[i].value == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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if (pev->args[i].type) {
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tev->args[i].type = strdup(pev->args[i].type);
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if (tev->args[i].type == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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}
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}
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}
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@ -1386,13 +1447,15 @@ static int convert_to_kprobe_trace_events(struct perf_probe_event *pev,
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if (!sym) {
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pr_warning("Kernel symbol \'%s\' not found.\n",
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tev->point.symbol);
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clear_kprobe_trace_event(tev);
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free(tev);
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*tevs = NULL;
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return -ENOENT;
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} else
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ret = 1;
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ret = -ENOENT;
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goto error;
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}
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return 1;
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error:
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clear_kprobe_trace_event(tev);
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free(tev);
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*tevs = NULL;
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return ret;
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}
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@ -1528,7 +1591,11 @@ int del_perf_probe_events(struct strlist *dellist)
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return -EINVAL;
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strlist__for_each(ent, dellist) {
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str = xstrdup(ent->s);
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str = strdup(ent->s);
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if (str == NULL) {
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ret = -ENOMEM;
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break;
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}
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pr_debug("Parsing: %s\n", str);
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p = strchr(str, ':');
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if (p) {
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@ -424,7 +424,10 @@ static int convert_location(Dwarf_Op *op, struct probe_finder *pf)
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return -ERANGE;
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}
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tvar->value = xstrdup(regs);
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tvar->value = strdup(regs);
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if (tvar->value == NULL)
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return -ENOMEM;
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if (ref) {
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tvar->ref = zalloc(sizeof(struct kprobe_trace_arg_ref));
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if (tvar->ref == NULL)
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@ -466,7 +469,9 @@ static int convert_variable_type(Dwarf_Die *vr_die,
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strerror(-ret));
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return ret;
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}
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targ->type = xstrdup(buf);
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targ->type = strdup(buf);
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if (targ->type == NULL)
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return -ENOMEM;
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}
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return 0;
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}
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@ -576,9 +581,11 @@ static int convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf)
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vr_die = &die_mem;
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}
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if (ret == 0) {
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if (pf->pvar->type)
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pf->tvar->type = xstrdup(pf->pvar->type);
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else
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if (pf->pvar->type) {
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pf->tvar->type = strdup(pf->pvar->type);
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if (pf->tvar->type == NULL)
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ret = -ENOMEM;
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} else
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ret = convert_variable_type(vr_die, pf->tvar);
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}
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/* *expr will be cached in libdw. Don't free it. */
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@ -595,22 +602,30 @@ static int find_variable(Dwarf_Die *sp_die, struct probe_finder *pf)
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{
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Dwarf_Die vr_die;
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char buf[32], *ptr;
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int ret;
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/* TODO: Support arrays */
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if (pf->pvar->name)
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pf->tvar->name = xstrdup(pf->pvar->name);
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pf->tvar->name = strdup(pf->pvar->name);
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else {
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synthesize_perf_probe_arg(pf->pvar, buf, 32);
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ret = synthesize_perf_probe_arg(pf->pvar, buf, 32);
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if (ret < 0)
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return ret;
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ptr = strchr(buf, ':'); /* Change type separator to _ */
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if (ptr)
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*ptr = '_';
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pf->tvar->name = xstrdup(buf);
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pf->tvar->name = strdup(buf);
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}
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if (pf->tvar->name == NULL)
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return -ENOMEM;
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if (!is_c_varname(pf->pvar->var)) {
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/* Copy raw parameters */
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pf->tvar->value = xstrdup(pf->pvar->var);
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return 0;
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pf->tvar->value = strdup(pf->pvar->var);
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if (pf->tvar->value == NULL)
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return -ENOMEM;
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else
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return 0;
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}
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pr_debug("Searching '%s' variable in context.\n",
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@ -660,7 +675,9 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
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dwarf_diename(sp_die));
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return -ENOENT;
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}
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tev->point.symbol = xstrdup(name);
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tev->point.symbol = strdup(name);
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if (tev->point.symbol == NULL)
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return -ENOMEM;
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tev->point.offset = (unsigned long)(pf->addr - eaddr);
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} else
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/* This function has no name. */
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@ -1028,7 +1045,11 @@ int find_perf_probe_point(int fd, unsigned long addr,
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tmp = dwarf_linesrc(line, NULL, NULL);
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if (tmp) {
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ppt->line = lineno;
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ppt->file = xstrdup(tmp);
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ppt->file = strdup(tmp);
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if (ppt->file == NULL) {
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ret = -ENOMEM;
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goto end;
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}
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found = true;
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}
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}
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@ -1064,7 +1085,11 @@ int find_perf_probe_point(int fd, unsigned long addr,
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/* We don't have a line number, let's use offset */
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ppt->offset = addr - (unsigned long)eaddr;
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found:
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ppt->function = xstrdup(tmp);
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ppt->function = strdup(tmp);
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if (ppt->function == NULL) {
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ret = -ENOMEM;
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goto end;
|
||||
}
|
||||
found = true;
|
||||
}
|
||||
|
||||
|
@ -1116,8 +1141,11 @@ static int find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
|
|||
continue;
|
||||
|
||||
/* Copy real path */
|
||||
if (!lf->lr->path)
|
||||
lf->lr->path = xstrdup(src);
|
||||
if (!lf->lr->path) {
|
||||
lf->lr->path = strdup(src);
|
||||
if (lf->lr->path == NULL)
|
||||
return -ENOMEM;
|
||||
}
|
||||
line_list__add_line(&lf->lr->line_list, (unsigned int)lineno);
|
||||
}
|
||||
/* Update status */
|
||||
|
|
Loading…
Reference in a new issue