perf probe: Move ftrace probe-event operations to probe-file.c
Move ftrace probe-event operations to probe-file.c from probe-event.c.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150715091407.8915.14316.stgit@localhost.localdomain
[ Fixed up strlist__new() calls wrt 4a77e2183f
("perf strlist: Make dupstr be the...") ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
a3c9de6280
commit
92f6c72e7a
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@ -79,6 +79,7 @@ libperf-$(CONFIG_AUXTRACE) += auxtrace.o
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libperf-y += parse-branch-options.o
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libperf-y += parse-branch-options.o
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libperf-$(CONFIG_LIBELF) += symbol-elf.o
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libperf-$(CONFIG_LIBELF) += symbol-elf.o
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libperf-$(CONFIG_LIBELF) += probe-file.o
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libperf-$(CONFIG_LIBELF) += probe-event.o
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libperf-$(CONFIG_LIBELF) += probe-event.o
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ifndef CONFIG_LIBELF
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ifndef CONFIG_LIBELF
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@ -45,6 +45,7 @@
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#include "trace-event.h" /* For __maybe_unused */
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#include "trace-event.h" /* For __maybe_unused */
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#include "probe-event.h"
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#include "probe-event.h"
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#include "probe-finder.h"
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#include "probe-finder.h"
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#include "probe-file.h"
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#include "session.h"
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#include "session.h"
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#define MAX_CMDLEN 256
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#define MAX_CMDLEN 256
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@ -55,11 +56,7 @@ struct probe_conf probe_conf;
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#define semantic_error(msg ...) pr_err("Semantic error :" msg)
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#define semantic_error(msg ...) pr_err("Semantic error :" msg)
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/* If there is no space to write, returns -E2BIG. */
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int e_snprintf(char *str, size_t size, const char *format, ...)
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static int e_snprintf(char *str, size_t size, const char *format, ...)
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__attribute__((format(printf, 3, 4)));
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static int e_snprintf(char *str, size_t size, const char *format, ...)
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{
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{
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int ret;
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int ret;
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va_list ap;
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va_list ap;
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@ -72,7 +69,6 @@ static int e_snprintf(char *str, size_t size, const char *format, ...)
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}
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}
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static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
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static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
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static void clear_probe_trace_event(struct probe_trace_event *tev);
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static struct machine *host_machine;
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static struct machine *host_machine;
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/* Initialize symbol maps and path of vmlinux/modules */
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/* Initialize symbol maps and path of vmlinux/modules */
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@ -1467,8 +1463,7 @@ bool perf_probe_event_need_dwarf(struct perf_probe_event *pev)
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}
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}
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/* Parse probe_events event into struct probe_point */
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/* Parse probe_events event into struct probe_point */
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static int parse_probe_trace_command(const char *cmd,
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int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
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struct probe_trace_event *tev)
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{
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{
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struct probe_trace_point *tp = &tev->point;
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struct probe_trace_point *tp = &tev->point;
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char pr;
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char pr;
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@ -1951,7 +1946,7 @@ void clear_perf_probe_event(struct perf_probe_event *pev)
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memset(pev, 0, sizeof(*pev));
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memset(pev, 0, sizeof(*pev));
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}
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}
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static void clear_probe_trace_event(struct probe_trace_event *tev)
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void clear_probe_trace_event(struct probe_trace_event *tev)
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{
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{
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struct probe_trace_arg_ref *ref, *next;
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struct probe_trace_arg_ref *ref, *next;
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int i;
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int i;
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@ -1976,119 +1971,6 @@ static void clear_probe_trace_event(struct probe_trace_event *tev)
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memset(tev, 0, sizeof(*tev));
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memset(tev, 0, sizeof(*tev));
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}
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}
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static void print_open_warning(int err, bool is_kprobe)
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{
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char sbuf[STRERR_BUFSIZE];
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if (err == -ENOENT) {
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const char *config;
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if (!is_kprobe)
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config = "CONFIG_UPROBE_EVENTS";
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else
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config = "CONFIG_KPROBE_EVENTS";
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pr_warning("%cprobe_events file does not exist"
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" - please rebuild kernel with %s.\n",
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is_kprobe ? 'k' : 'u', config);
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} else if (err == -ENOTSUP)
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pr_warning("Tracefs or debugfs is not mounted.\n");
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else
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pr_warning("Failed to open %cprobe_events: %s\n",
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is_kprobe ? 'k' : 'u',
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strerror_r(-err, sbuf, sizeof(sbuf)));
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}
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static void print_both_open_warning(int kerr, int uerr)
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{
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/* Both kprobes and uprobes are disabled, warn it. */
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if (kerr == -ENOTSUP && uerr == -ENOTSUP)
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pr_warning("Tracefs or debugfs is not mounted.\n");
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else if (kerr == -ENOENT && uerr == -ENOENT)
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pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS "
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"or/and CONFIG_UPROBE_EVENTS.\n");
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else {
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char sbuf[STRERR_BUFSIZE];
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pr_warning("Failed to open kprobe events: %s.\n",
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strerror_r(-kerr, sbuf, sizeof(sbuf)));
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pr_warning("Failed to open uprobe events: %s.\n",
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strerror_r(-uerr, sbuf, sizeof(sbuf)));
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}
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}
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static int open_probe_events(const char *trace_file, bool readwrite)
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{
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char buf[PATH_MAX];
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const char *__debugfs;
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const char *tracing_dir = "";
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int ret;
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__debugfs = tracefs_find_mountpoint();
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if (__debugfs == NULL) {
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tracing_dir = "tracing/";
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__debugfs = debugfs_find_mountpoint();
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if (__debugfs == NULL)
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return -ENOTSUP;
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}
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ret = e_snprintf(buf, PATH_MAX, "%s/%s%s",
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__debugfs, tracing_dir, trace_file);
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if (ret >= 0) {
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pr_debug("Opening %s write=%d\n", buf, readwrite);
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if (readwrite && !probe_event_dry_run)
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ret = open(buf, O_RDWR | O_APPEND, 0);
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else
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ret = open(buf, O_RDONLY, 0);
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if (ret < 0)
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ret = -errno;
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}
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return ret;
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}
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static int open_kprobe_events(bool readwrite)
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{
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return open_probe_events("kprobe_events", readwrite);
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}
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static int open_uprobe_events(bool readwrite)
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{
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return open_probe_events("uprobe_events", readwrite);
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}
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/* Get raw string list of current kprobe_events or uprobe_events */
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static struct strlist *get_probe_trace_command_rawlist(int fd)
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{
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int ret, idx;
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FILE *fp;
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char buf[MAX_CMDLEN];
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char *p;
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struct strlist *sl;
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sl = strlist__new(NULL, NULL);
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fp = fdopen(dup(fd), "r");
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while (!feof(fp)) {
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p = fgets(buf, MAX_CMDLEN, fp);
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if (!p)
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break;
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idx = strlen(p) - 1;
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if (p[idx] == '\n')
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p[idx] = '\0';
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ret = strlist__add(sl, buf);
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if (ret < 0) {
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pr_debug("strlist__add failed (%d)\n", ret);
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strlist__delete(sl);
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return NULL;
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}
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}
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fclose(fp);
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return sl;
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}
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struct kprobe_blacklist_node {
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struct kprobe_blacklist_node {
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struct list_head list;
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struct list_head list;
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unsigned long start;
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unsigned long start;
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@ -2284,7 +2166,7 @@ static int __show_perf_probe_events(int fd, bool is_kprobe,
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memset(&tev, 0, sizeof(tev));
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memset(&tev, 0, sizeof(tev));
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memset(&pev, 0, sizeof(pev));
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memset(&pev, 0, sizeof(pev));
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rawlist = get_probe_trace_command_rawlist(fd);
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rawlist = probe_file__get_rawlist(fd);
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if (!rawlist)
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if (!rawlist)
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return -ENOMEM;
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return -ENOMEM;
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@ -2325,89 +2207,20 @@ int show_perf_probe_events(struct strfilter *filter)
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if (ret < 0)
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if (ret < 0)
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return ret;
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return ret;
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kp_fd = open_kprobe_events(false);
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ret = probe_file__open_both(&kp_fd, &up_fd, 0);
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if (kp_fd >= 0) {
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if (ret < 0)
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return ret;
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if (kp_fd >= 0)
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ret = __show_perf_probe_events(kp_fd, true, filter);
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ret = __show_perf_probe_events(kp_fd, true, filter);
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close(kp_fd);
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if (up_fd >= 0 && ret >= 0)
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if (ret < 0)
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goto out;
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}
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up_fd = open_uprobe_events(false);
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if (kp_fd < 0 && up_fd < 0) {
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print_both_open_warning(kp_fd, up_fd);
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ret = kp_fd;
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goto out;
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}
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if (up_fd >= 0) {
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ret = __show_perf_probe_events(up_fd, false, filter);
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ret = __show_perf_probe_events(up_fd, false, filter);
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if (kp_fd > 0)
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close(kp_fd);
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if (up_fd > 0)
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close(up_fd);
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close(up_fd);
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}
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out:
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exit_symbol_maps();
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exit_symbol_maps();
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return ret;
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}
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/* Get current perf-probe event names */
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static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
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{
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char buf[128];
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struct strlist *sl, *rawlist;
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struct str_node *ent;
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struct probe_trace_event tev;
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int ret = 0;
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memset(&tev, 0, sizeof(tev));
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rawlist = get_probe_trace_command_rawlist(fd);
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if (!rawlist)
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return NULL;
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sl = strlist__new(NULL, NULL);
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strlist__for_each(ent, rawlist) {
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ret = parse_probe_trace_command(ent->s, &tev);
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if (ret < 0)
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break;
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if (include_group) {
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ret = e_snprintf(buf, 128, "%s:%s", tev.group,
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tev.event);
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if (ret >= 0)
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ret = strlist__add(sl, buf);
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} else
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ret = strlist__add(sl, tev.event);
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clear_probe_trace_event(&tev);
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if (ret < 0)
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break;
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}
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strlist__delete(rawlist);
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if (ret < 0) {
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strlist__delete(sl);
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return NULL;
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}
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return sl;
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}
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static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
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{
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int ret = 0;
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char *buf = synthesize_probe_trace_command(tev);
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char sbuf[STRERR_BUFSIZE];
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if (!buf) {
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pr_debug("Failed to synthesize probe trace event.\n");
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return -EINVAL;
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}
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pr_debug("Writing event: %s\n", buf);
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if (!probe_event_dry_run) {
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ret = write(fd, buf, strlen(buf));
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if (ret <= 0) {
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ret = -errno;
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pr_warning("Failed to write event: %s\n",
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strerror_r(errno, sbuf, sizeof(sbuf)));
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}
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}
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free(buf);
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return ret;
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return ret;
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}
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}
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@ -2527,18 +2340,12 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
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const char *event = NULL, *group = NULL;
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const char *event = NULL, *group = NULL;
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struct strlist *namelist;
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struct strlist *namelist;
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if (pev->uprobes)
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fd = probe_file__open(PF_FL_RW | (pev->uprobes ? PF_FL_UPROBE : 0));
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fd = open_uprobe_events(true);
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if (fd < 0)
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else
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fd = open_kprobe_events(true);
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if (fd < 0) {
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print_open_warning(fd, !pev->uprobes);
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return fd;
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return fd;
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}
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/* Get current event names */
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/* Get current event names */
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namelist = get_probe_trace_event_names(fd, false);
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namelist = probe_file__get_namelist(fd);
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if (!namelist) {
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if (!namelist) {
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pr_debug("Failed to get current event list.\n");
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pr_debug("Failed to get current event list.\n");
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ret = -ENOMEM;
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ret = -ENOMEM;
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@ -2559,7 +2366,7 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
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if (ret < 0)
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if (ret < 0)
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break;
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break;
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ret = write_probe_trace_event(fd, tev);
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ret = probe_file__add_event(fd, tev);
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if (ret < 0)
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if (ret < 0)
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break;
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break;
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@ -2854,68 +2661,9 @@ end:
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return ret;
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return ret;
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}
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}
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static int __del_trace_probe_event(int fd, struct str_node *ent)
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{
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char *p;
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char buf[128];
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int ret;
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/* Convert from perf-probe event to trace-probe event */
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ret = e_snprintf(buf, 128, "-:%s", ent->s);
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if (ret < 0)
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goto error;
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p = strchr(buf + 2, ':');
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if (!p) {
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pr_debug("Internal error: %s should have ':' but not.\n",
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ent->s);
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ret = -ENOTSUP;
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goto error;
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}
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*p = '/';
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pr_debug("Writing event: %s\n", buf);
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ret = write(fd, buf, strlen(buf));
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if (ret < 0) {
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ret = -errno;
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goto error;
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}
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pr_info("Removed event: %s\n", ent->s);
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return 0;
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error:
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pr_warning("Failed to delete event: %s\n",
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strerror_r(-ret, buf, sizeof(buf)));
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return ret;
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}
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static int del_trace_probe_events(int fd, struct strfilter *filter,
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struct strlist *namelist)
|
|
||||||
{
|
|
||||||
struct str_node *ent;
|
|
||||||
const char *p;
|
|
||||||
int ret = -ENOENT;
|
|
||||||
|
|
||||||
if (!namelist)
|
|
||||||
return -ENOENT;
|
|
||||||
|
|
||||||
strlist__for_each(ent, namelist) {
|
|
||||||
p = strchr(ent->s, ':');
|
|
||||||
if ((p && strfilter__compare(filter, p + 1)) ||
|
|
||||||
strfilter__compare(filter, ent->s)) {
|
|
||||||
ret = __del_trace_probe_event(fd, ent);
|
|
||||||
if (ret < 0)
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
int del_perf_probe_events(struct strfilter *filter)
|
int del_perf_probe_events(struct strfilter *filter)
|
||||||
{
|
{
|
||||||
int ret, ret2, ufd = -1, kfd = -1;
|
int ret, ret2, ufd = -1, kfd = -1;
|
||||||
struct strlist *namelist = NULL, *unamelist = NULL;
|
|
||||||
char *str = strfilter__string(filter);
|
char *str = strfilter__string(filter);
|
||||||
|
|
||||||
if (!str)
|
if (!str)
|
||||||
|
@ -2924,25 +2672,15 @@ int del_perf_probe_events(struct strfilter *filter)
|
||||||
pr_debug("Delete filter: \'%s\'\n", str);
|
pr_debug("Delete filter: \'%s\'\n", str);
|
||||||
|
|
||||||
/* Get current event names */
|
/* Get current event names */
|
||||||
kfd = open_kprobe_events(true);
|
ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
|
||||||
if (kfd >= 0)
|
if (ret < 0)
|
||||||
namelist = get_probe_trace_event_names(kfd, true);
|
goto out;
|
||||||
|
|
||||||
ufd = open_uprobe_events(true);
|
ret = probe_file__del_events(kfd, filter);
|
||||||
if (ufd >= 0)
|
|
||||||
unamelist = get_probe_trace_event_names(ufd, true);
|
|
||||||
|
|
||||||
if (kfd < 0 && ufd < 0) {
|
|
||||||
print_both_open_warning(kfd, ufd);
|
|
||||||
ret = kfd;
|
|
||||||
goto error;
|
|
||||||
}
|
|
||||||
|
|
||||||
ret = del_trace_probe_events(kfd, filter, namelist);
|
|
||||||
if (ret < 0 && ret != -ENOENT)
|
if (ret < 0 && ret != -ENOENT)
|
||||||
goto error;
|
goto error;
|
||||||
|
|
||||||
ret2 = del_trace_probe_events(ufd, filter, unamelist);
|
ret2 = probe_file__del_events(ufd, filter);
|
||||||
if (ret2 < 0 && ret2 != -ENOENT) {
|
if (ret2 < 0 && ret2 != -ENOENT) {
|
||||||
ret = ret2;
|
ret = ret2;
|
||||||
goto error;
|
goto error;
|
||||||
|
@ -2953,15 +2691,11 @@ int del_perf_probe_events(struct strfilter *filter)
|
||||||
ret = 0;
|
ret = 0;
|
||||||
|
|
||||||
error:
|
error:
|
||||||
if (kfd >= 0) {
|
if (kfd >= 0)
|
||||||
strlist__delete(namelist);
|
|
||||||
close(kfd);
|
close(kfd);
|
||||||
}
|
if (ufd >= 0)
|
||||||
|
|
||||||
if (ufd >= 0) {
|
|
||||||
strlist__delete(unamelist);
|
|
||||||
close(ufd);
|
close(ufd);
|
||||||
}
|
out:
|
||||||
free(str);
|
free(str);
|
||||||
|
|
||||||
return ret;
|
return ret;
|
||||||
|
|
|
@ -109,6 +109,8 @@ struct variable_list {
|
||||||
/* Command string to events */
|
/* Command string to events */
|
||||||
extern int parse_perf_probe_command(const char *cmd,
|
extern int parse_perf_probe_command(const char *cmd,
|
||||||
struct perf_probe_event *pev);
|
struct perf_probe_event *pev);
|
||||||
|
extern int parse_probe_trace_command(const char *cmd,
|
||||||
|
struct probe_trace_event *tev);
|
||||||
|
|
||||||
/* Events to command string */
|
/* Events to command string */
|
||||||
extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
|
extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
|
||||||
|
@ -121,6 +123,7 @@ extern bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
|
||||||
|
|
||||||
/* Release event contents */
|
/* Release event contents */
|
||||||
extern void clear_perf_probe_event(struct perf_probe_event *pev);
|
extern void clear_perf_probe_event(struct perf_probe_event *pev);
|
||||||
|
extern void clear_probe_trace_event(struct probe_trace_event *tev);
|
||||||
|
|
||||||
/* Command string to line-range */
|
/* Command string to line-range */
|
||||||
extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
|
extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
|
||||||
|
@ -144,6 +147,10 @@ bool arch__prefers_symtab(void);
|
||||||
void arch__fix_tev_from_maps(struct perf_probe_event *pev,
|
void arch__fix_tev_from_maps(struct perf_probe_event *pev,
|
||||||
struct probe_trace_event *tev, struct map *map);
|
struct probe_trace_event *tev, struct map *map);
|
||||||
|
|
||||||
|
/* If there is no space to write, returns -E2BIG. */
|
||||||
|
int e_snprintf(char *str, size_t size, const char *format, ...)
|
||||||
|
__attribute__((format(printf, 3, 4)));
|
||||||
|
|
||||||
/* Maximum index number of event-name postfix */
|
/* Maximum index number of event-name postfix */
|
||||||
#define MAX_EVENT_INDEX 1024
|
#define MAX_EVENT_INDEX 1024
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,301 @@
|
||||||
|
/*
|
||||||
|
* probe-file.c : operate ftrace k/uprobe events files
|
||||||
|
*
|
||||||
|
* Written by Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
#include "util.h"
|
||||||
|
#include "event.h"
|
||||||
|
#include "strlist.h"
|
||||||
|
#include "debug.h"
|
||||||
|
#include "cache.h"
|
||||||
|
#include "color.h"
|
||||||
|
#include "symbol.h"
|
||||||
|
#include "thread.h"
|
||||||
|
#include <api/fs/debugfs.h>
|
||||||
|
#include <api/fs/tracefs.h>
|
||||||
|
#include "probe-event.h"
|
||||||
|
#include "probe-file.h"
|
||||||
|
#include "session.h"
|
||||||
|
|
||||||
|
#define MAX_CMDLEN 256
|
||||||
|
|
||||||
|
static void print_open_warning(int err, bool uprobe)
|
||||||
|
{
|
||||||
|
char sbuf[STRERR_BUFSIZE];
|
||||||
|
|
||||||
|
if (err == -ENOENT) {
|
||||||
|
const char *config;
|
||||||
|
|
||||||
|
if (uprobe)
|
||||||
|
config = "CONFIG_UPROBE_EVENTS";
|
||||||
|
else
|
||||||
|
config = "CONFIG_KPROBE_EVENTS";
|
||||||
|
|
||||||
|
pr_warning("%cprobe_events file does not exist"
|
||||||
|
" - please rebuild kernel with %s.\n",
|
||||||
|
uprobe ? 'u' : 'k', config);
|
||||||
|
} else if (err == -ENOTSUP)
|
||||||
|
pr_warning("Tracefs or debugfs is not mounted.\n");
|
||||||
|
else
|
||||||
|
pr_warning("Failed to open %cprobe_events: %s\n",
|
||||||
|
uprobe ? 'u' : 'k',
|
||||||
|
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("Tracefs or 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)
|
||||||
|
{
|
||||||
|
char buf[PATH_MAX];
|
||||||
|
const char *__debugfs;
|
||||||
|
const char *tracing_dir = "";
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
__debugfs = tracefs_find_mountpoint();
|
||||||
|
if (__debugfs == NULL) {
|
||||||
|
tracing_dir = "tracing/";
|
||||||
|
|
||||||
|
__debugfs = debugfs_find_mountpoint();
|
||||||
|
if (__debugfs == NULL)
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = e_snprintf(buf, PATH_MAX, "%s/%s%s",
|
||||||
|
__debugfs, tracing_dir, trace_file);
|
||||||
|
if (ret >= 0) {
|
||||||
|
pr_debug("Opening %s write=%d\n", buf, readwrite);
|
||||||
|
if (readwrite && !probe_event_dry_run)
|
||||||
|
ret = open(buf, O_RDWR | O_APPEND, 0);
|
||||||
|
else
|
||||||
|
ret = open(buf, O_RDONLY, 0);
|
||||||
|
|
||||||
|
if (ret < 0)
|
||||||
|
ret = -errno;
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int open_kprobe_events(bool readwrite)
|
||||||
|
{
|
||||||
|
return open_probe_events("kprobe_events", readwrite);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int open_uprobe_events(bool readwrite)
|
||||||
|
{
|
||||||
|
return open_probe_events("uprobe_events", readwrite);
|
||||||
|
}
|
||||||
|
|
||||||
|
int probe_file__open(int flag)
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
|
||||||
|
if (flag & PF_FL_UPROBE)
|
||||||
|
fd = open_uprobe_events(flag & PF_FL_RW);
|
||||||
|
else
|
||||||
|
fd = open_kprobe_events(flag & PF_FL_RW);
|
||||||
|
if (fd < 0)
|
||||||
|
print_open_warning(fd, flag & PF_FL_UPROBE);
|
||||||
|
|
||||||
|
return fd;
|
||||||
|
}
|
||||||
|
|
||||||
|
int probe_file__open_both(int *kfd, int *ufd, int flag)
|
||||||
|
{
|
||||||
|
if (!kfd || !ufd)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
*kfd = open_kprobe_events(flag & PF_FL_RW);
|
||||||
|
*ufd = open_uprobe_events(flag & PF_FL_RW);
|
||||||
|
if (*kfd < 0 && *ufd < 0) {
|
||||||
|
print_both_open_warning(*kfd, *ufd);
|
||||||
|
return *kfd;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get raw string list of current kprobe_events or uprobe_events */
|
||||||
|
struct strlist *probe_file__get_rawlist(int fd)
|
||||||
|
{
|
||||||
|
int ret, idx;
|
||||||
|
FILE *fp;
|
||||||
|
char buf[MAX_CMDLEN];
|
||||||
|
char *p;
|
||||||
|
struct strlist *sl;
|
||||||
|
|
||||||
|
sl = strlist__new(NULL, NULL);
|
||||||
|
|
||||||
|
fp = fdopen(dup(fd), "r");
|
||||||
|
while (!feof(fp)) {
|
||||||
|
p = fgets(buf, MAX_CMDLEN, fp);
|
||||||
|
if (!p)
|
||||||
|
break;
|
||||||
|
|
||||||
|
idx = strlen(p) - 1;
|
||||||
|
if (p[idx] == '\n')
|
||||||
|
p[idx] = '\0';
|
||||||
|
ret = strlist__add(sl, buf);
|
||||||
|
if (ret < 0) {
|
||||||
|
pr_debug("strlist__add failed (%d)\n", ret);
|
||||||
|
strlist__delete(sl);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
fclose(fp);
|
||||||
|
|
||||||
|
return sl;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct strlist *__probe_file__get_namelist(int fd, bool include_group)
|
||||||
|
{
|
||||||
|
char buf[128];
|
||||||
|
struct strlist *sl, *rawlist;
|
||||||
|
struct str_node *ent;
|
||||||
|
struct probe_trace_event tev;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
|
memset(&tev, 0, sizeof(tev));
|
||||||
|
rawlist = probe_file__get_rawlist(fd);
|
||||||
|
if (!rawlist)
|
||||||
|
return NULL;
|
||||||
|
sl = strlist__new(NULL, NULL);
|
||||||
|
strlist__for_each(ent, rawlist) {
|
||||||
|
ret = parse_probe_trace_command(ent->s, &tev);
|
||||||
|
if (ret < 0)
|
||||||
|
break;
|
||||||
|
if (include_group) {
|
||||||
|
ret = e_snprintf(buf, 128, "%s:%s", tev.group,
|
||||||
|
tev.event);
|
||||||
|
if (ret >= 0)
|
||||||
|
ret = strlist__add(sl, buf);
|
||||||
|
} else
|
||||||
|
ret = strlist__add(sl, tev.event);
|
||||||
|
clear_probe_trace_event(&tev);
|
||||||
|
if (ret < 0)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
strlist__delete(rawlist);
|
||||||
|
|
||||||
|
if (ret < 0) {
|
||||||
|
strlist__delete(sl);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
return sl;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get current perf-probe event names */
|
||||||
|
struct strlist *probe_file__get_namelist(int fd)
|
||||||
|
{
|
||||||
|
return __probe_file__get_namelist(fd, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
int probe_file__add_event(int fd, struct probe_trace_event *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");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
pr_debug("Writing event: %s\n", buf);
|
||||||
|
if (!probe_event_dry_run) {
|
||||||
|
ret = write(fd, buf, strlen(buf));
|
||||||
|
if (ret <= 0) {
|
||||||
|
ret = -errno;
|
||||||
|
pr_warning("Failed to write event: %s\n",
|
||||||
|
strerror_r(errno, sbuf, sizeof(sbuf)));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
free(buf);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __del_trace_probe_event(int fd, struct str_node *ent)
|
||||||
|
{
|
||||||
|
char *p;
|
||||||
|
char buf[128];
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
/* Convert from perf-probe event to trace-probe event */
|
||||||
|
ret = e_snprintf(buf, 128, "-:%s", ent->s);
|
||||||
|
if (ret < 0)
|
||||||
|
goto error;
|
||||||
|
|
||||||
|
p = strchr(buf + 2, ':');
|
||||||
|
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) {
|
||||||
|
ret = -errno;
|
||||||
|
goto error;
|
||||||
|
}
|
||||||
|
|
||||||
|
pr_info("Removed event: %s\n", ent->s);
|
||||||
|
return 0;
|
||||||
|
error:
|
||||||
|
pr_warning("Failed to delete event: %s\n",
|
||||||
|
strerror_r(-ret, buf, sizeof(buf)));
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int probe_file__del_events(int fd, struct strfilter *filter)
|
||||||
|
{
|
||||||
|
struct strlist *namelist;
|
||||||
|
struct str_node *ent;
|
||||||
|
const char *p;
|
||||||
|
int ret = -ENOENT;
|
||||||
|
|
||||||
|
namelist = __probe_file__get_namelist(fd, true);
|
||||||
|
if (!namelist)
|
||||||
|
return -ENOENT;
|
||||||
|
|
||||||
|
strlist__for_each(ent, namelist) {
|
||||||
|
p = strchr(ent->s, ':');
|
||||||
|
if ((p && strfilter__compare(filter, p + 1)) ||
|
||||||
|
strfilter__compare(filter, ent->s)) {
|
||||||
|
ret = __del_trace_probe_event(fd, ent);
|
||||||
|
if (ret < 0)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
strlist__delete(namelist);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
|
@ -0,0 +1,18 @@
|
||||||
|
#ifndef __PROBE_FILE_H
|
||||||
|
#define __PROBE_FILE_H
|
||||||
|
|
||||||
|
#include "strlist.h"
|
||||||
|
#include "strfilter.h"
|
||||||
|
#include "probe-event.h"
|
||||||
|
|
||||||
|
#define PF_FL_UPROBE 1
|
||||||
|
#define PF_FL_RW 2
|
||||||
|
|
||||||
|
int probe_file__open(int flag);
|
||||||
|
int probe_file__open_both(int *kfd, int *ufd, int flag);
|
||||||
|
struct strlist *probe_file__get_namelist(int fd);
|
||||||
|
struct strlist *probe_file__get_rawlist(int fd);
|
||||||
|
int probe_file__add_event(int fd, struct probe_trace_event *tev);
|
||||||
|
int probe_file__del_events(int fd, struct strfilter *filter);
|
||||||
|
|
||||||
|
#endif
|
Loading…
Reference in New Issue