diff options
Diffstat (limited to 'tools/perf/util/probe-event.c')
| -rw-r--r-- | tools/perf/util/probe-event.c | 422 |
1 files changed, 336 insertions, 86 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 8a8ee64e72d1..59dccc98b554 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -44,6 +44,7 @@ #include "trace-event.h" /* For __unused */ #include "probe-event.h" #include "probe-finder.h" +#include "session.h" #define MAX_CMDLEN 256 #define MAX_PROBE_ARGS 128 @@ -70,6 +71,8 @@ static int e_snprintf(char *str, size_t size, const char *format, ...) } static char *synthesize_perf_probe_point(struct perf_probe_point *pp); +static int convert_name_to_addr(struct perf_probe_event *pev, + const char *exec); static struct machine machine; /* Initialize symbol maps and path of vmlinux/modules */ @@ -170,6 +173,34 @@ const char *kernel_get_module_path(const char *module) return (dso) ? dso->long_name : NULL; } +static int init_user_exec(void) +{ + int ret = 0; + + symbol_conf.try_vmlinux_path = false; + symbol_conf.sort_by_name = true; + ret = symbol__init(); + + if (ret < 0) + pr_debug("Failed to init symbol map.\n"); + + return ret; +} + +static int convert_to_perf_probe_point(struct probe_trace_point *tp, + struct perf_probe_point *pp) +{ + pp->function = strdup(tp->symbol); + + if (pp->function == NULL) + return -ENOMEM; + + pp->offset = tp->offset; + pp->retprobe = tp->retprobe; + + return 0; +} + #ifdef DWARF_SUPPORT /* Open new debuginfo of given module */ static struct debuginfo *open_debuginfo(const char *module) @@ -224,10 +255,7 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, if (ret <= 0) { pr_debug("Failed to find corresponding probes from " "debuginfo. Use kprobe event information.\n"); - pp->function = strdup(tp->symbol); - if (pp->function == NULL) - return -ENOMEM; - pp->offset = tp->offset; + return convert_to_perf_probe_point(tp, pp); } pp->retprobe = tp->retprobe; @@ -275,9 +303,20 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev, int max_tevs, const char *target) { bool need_dwarf = perf_probe_event_need_dwarf(pev); - struct debuginfo *dinfo = open_debuginfo(target); + struct debuginfo *dinfo; int ntevs, ret = 0; + if (pev->uprobes) { + if (need_dwarf) { + pr_warning("Debuginfo-analysis is not yet supported" + " with -x/--exec option.\n"); + return -ENOSYS; + } + return convert_name_to_addr(pev, target); + } + + dinfo = open_debuginfo(target); + if (!dinfo) { if (need_dwarf) { pr_warning("Failed to open debuginfo file.\n"); @@ -603,23 +642,22 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); return -ENOENT; } - pp->function = strdup(tp->symbol); - if (pp->function == NULL) - return -ENOMEM; - pp->offset = tp->offset; - pp->retprobe = tp->retprobe; - return 0; + return convert_to_perf_probe_point(tp, pp); } static int try_to_find_probe_trace_events(struct perf_probe_event *pev, struct probe_trace_event **tevs __unused, - int max_tevs __unused, const char *mod __unused) + int max_tevs __unused, const char *target) { if (perf_probe_event_need_dwarf(pev)) { pr_warning("Debuginfo-analysis is not supported.\n"); return -ENOSYS; } + + if (pev->uprobes) + return convert_name_to_addr(pev, target); + return 0; } @@ -1341,11 +1379,18 @@ char *synthesize_probe_trace_command(struct probe_trace_event *tev) if (buf == NULL) return NULL; - len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", - tp->retprobe ? 'r' : 'p', - tev->group, tev->event, - tp->module ?: "", tp->module ? ":" : "", - tp->symbol, tp->offset); + if (tev->uprobes) + len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s", + tp->retprobe ? 'r' : 'p', + tev->group, tev->event, + tp->module, tp->symbol); + else + len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu", + tp->retprobe ? 'r' : 'p', + tev->group, tev->event, + tp->module ?: "", tp->module ? ":" : "", + tp->symbol, tp->offset); + if (len <= 0) goto error; @@ -1364,7 +1409,7 @@ error: } static int convert_to_perf_probe_event(struct probe_trace_event *tev, - struct perf_probe_event *pev) + struct perf_probe_event *pev, bool is_kprobe) { char buf[64] = ""; int i, ret; @@ -1376,7 +1421,11 @@ static int convert_to_perf_probe_event(struct probe_trace_event *tev, return -ENOMEM; /* Convert trace_point to probe_point */ - ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); + if (is_kprobe) + ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); + else + ret = convert_to_perf_probe_point(&tev->point, &pev->point); + if (ret < 0) return ret; @@ -1472,7 +1521,26 @@ static void clear_probe_trace_event(struct probe_trace_event *tev) memset(tev, 0, sizeof(*tev)); } -static int open_kprobe_events(bool readwrite) +static void print_warn_msg(const char *file, bool is_kprobe) +{ + + if (errno == ENOENT) { + const char *config; + + if (!is_kprobe) + config = "CONFIG_UPROBE_EVENTS"; + else + config = "CONFIG_KPROBE_EVENTS"; + + pr_warning("%s file does not exist - please rebuild kernel" + " with %s.\n", file, config); + } else + pr_warning("Failed to open %s file: %s\n", file, + strerror(errno)); +} + +static int open_probe_events(const char *trace_file, bool readwrite, + bool is_kprobe) { char buf[PATH_MAX]; const char *__debugfs; @@ -1484,27 +1552,31 @@ static int open_kprobe_events(bool readwrite) return -ENOENT; } - ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); + ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, 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); else ret = open(buf, O_RDONLY, 0); - } - if (ret < 0) { - if (errno == ENOENT) - pr_warning("kprobe_events file does not exist - please" - " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); - else - pr_warning("Failed to open kprobe_events file: %s\n", - strerror(errno)); + if (ret < 0) + print_warn_msg(buf, is_kprobe); } return ret; } -/* Get raw string list of current kprobe_events */ +static int open_kprobe_events(bool readwrite) +{ + return open_probe_events("tracing/kprobe_events", readwrite, true); +} + +static int open_uprobe_events(bool readwrite) +{ + return open_probe_events("tracing/uprobe_events", readwrite, false); +} + +/* Get raw string list of current kprobe_events or uprobe_events */ static struct strlist *get_probe_trace_command_rawlist(int fd) { int ret, idx; @@ -1569,36 +1641,26 @@ static int show_perf_probe_event(struct perf_probe_event *pev) return ret; } -/* List up current perf-probe events */ -int show_perf_probe_events(void) +static int __show_perf_probe_events(int fd, bool is_kprobe) { - int fd, ret; + int ret = 0; struct probe_trace_event tev; struct perf_probe_event pev; struct strlist *rawlist; struct str_node *ent; - setup_pager(); - 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_probe_trace_command_rawlist(fd); - close(fd); if (!rawlist) return -ENOENT; strlist__for_each(ent, rawlist) { ret = parse_probe_trace_command(ent->s, &tev); if (ret >= 0) { - ret = convert_to_perf_probe_event(&tev, &pev); + ret = convert_to_perf_probe_event(&tev, &pev, + is_kprobe); if (ret >= 0) ret = show_perf_probe_event(&pev); } @@ -1612,6 +1674,33 @@ int show_perf_probe_events(void) return ret; } +/* List up current perf-probe events */ +int show_perf_probe_events(void) +{ + int fd, ret; + + setup_pager(); + fd = open_kprobe_events(false); + + if (fd < 0) + return fd; + + ret = init_vmlinux(); + if (ret < 0) + return ret; + + ret = __show_perf_probe_events(fd, true); + close(fd); + + fd = open_uprobe_events(false); + if (fd >= 0) { + ret = __show_perf_probe_events(fd, false); + close(fd); + } + + return ret; +} + /* Get current perf-probe event names */ static struct strlist *get_probe_trace_event_names(int fd, bool include_group) { @@ -1717,7 +1806,11 @@ static int __add_probe_trace_events(struct perf_probe_event *pev, const char *event, *group; struct strlist *namelist; - fd = open_kprobe_events(true); + if (pev->uprobes) + fd = open_uprobe_events(true); + else + fd = open_kprobe_events(true); + if (fd < 0) return fd; /* Get current event names */ @@ -1829,6 +1922,8 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev, tev->point.offset = pev->point.offset; tev->point.retprobe = pev->point.retprobe; tev->nargs = pev->nargs; + tev->uprobes = pev->uprobes; + if (tev->nargs) { tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); @@ -1859,6 +1954,9 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev, } } + if (pev->uprobes) + return 1; + /* Currently just checking function name from symbol map */ sym = __find_kernel_function_by_name(tev->point.symbol, NULL); if (!sym) { @@ -1894,12 +1992,18 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, int i, j, ret; struct __event_package *pkgs; + ret = 0; pkgs = zalloc(sizeof(struct __event_package) * npevs); + if (pkgs == NULL) return -ENOMEM; - /* Init vmlinux path */ - ret = init_vmlinux(); + if (!pevs->uprobes) + /* Init vmlinux path */ + ret = init_vmlinux(); + else + ret = init_user_exec(); + if (ret < 0) { free(pkgs); return ret; @@ -1971,23 +2075,15 @@ error: return ret; } -static int del_trace_probe_event(int fd, const char *group, - const char *event, struct strlist *namelist) +static int del_trace_probe_event(int fd, const char *buf, + struct strlist *namelist) { - char buf[128]; struct str_node *ent, *n; - int found = 0, ret = 0; - - ret = e_snprintf(buf, 128, "%s:%s", group, event); - if (ret < 0) { - pr_err("Failed to copy event.\n"); - return ret; - } + int ret = -1; if (strpbrk(buf, "*?")) { /* Glob-exp */ strlist__for_each_safe(ent, n, namelist) if (strglobmatch(ent->s, buf)) { - found++; ret = __del_trace_probe_event(fd, ent); if (ret < 0) break; @@ -1996,40 +2092,43 @@ static int del_trace_probe_event(int fd, const char *group, } else { ent = strlist__find(namelist, buf); if (ent) { - found++; ret = __del_trace_probe_event(fd, ent); if (ret >= 0) strlist__remove(namelist, ent); } } - if (found == 0 && ret >= 0) - pr_info("Info: Event \"%s\" does not exist.\n", buf); return ret; } int del_perf_probe_events(struct strlist *dellist) { - int fd, ret = 0; + int ret = -1, ufd = -1, kfd = -1; + char buf[128]; const char *group, *event; char *p, *str; struct str_node *ent; - struct strlist *namelist; - - fd = open_kprobe_events(true); - if (fd < 0) - return fd; + struct strlist *namelist = NULL, *unamelist = NULL; /* Get current event names */ - namelist = get_probe_trace_event_names(fd, true); - if (namelist == NULL) - return -EINVAL; + kfd = open_kprobe_events(true); + if (kfd < 0) + return kfd; + + namelist = get_probe_trace_event_names(kfd, true); + ufd = open_uprobe_events(true); + + if (ufd >= 0) + unamelist = get_probe_trace_event_names(ufd, true); + + if (namelist == NULL && unamelist == NULL) + goto error; strlist__for_each(ent, dellist) { str = strdup(ent->s); if (str == NULL) { ret = -ENOMEM; - break; + goto error; } pr_debug("Parsing: %s\n", str); p = strchr(str, ':'); @@ -2041,17 +2140,46 @@ int del_perf_probe_events(struct strlist *dellist) group = "*"; event = str; } + + ret = e_snprintf(buf, 128, "%s:%s", group, event); + if (ret < 0) { + pr_err("Failed to copy event."); + free(str); + goto error; + } + pr_debug("Group: %s, Event: %s\n", group, event); - ret = del_trace_probe_event(fd, group, event, namelist); + + if (namelist) + ret = del_trace_probe_event(kfd, buf, namelist); + + if (unamelist && ret != 0) + ret = del_trace_probe_event(ufd, buf, unamelist); + + if (ret != 0) + pr_info("Info: Event \"%s\" does not exist.\n", buf); + free(str); - if (ret < 0) - break; } - strlist__delete(namelist); - close(fd); + +error: + if (kfd >= 0) { + if (namelist) + strlist__delete(namelist); + + close(kfd); + } + + if (ufd >= 0) { + if (unamelist) + strlist__delete(unamelist); + + close(ufd); + } return ret; } + /* TODO: don't use a global variable for filter ... */ static struct strfilter *available_func_filter; @@ -2068,30 +2196,152 @@ static int filter_available_functions(struct map *map __unused, return 1; } -int show_available_funcs(const char *target, struct strfilter *_filter) +static int __show_available_funcs(struct map *map) +{ + if (map__load(map, filter_available_functions)) { + pr_err("Failed to load map.\n"); + return -EINVAL; + } + if (!dso__sorted_by_name(map->dso, map->type)) + dso__sort_by_name(map->dso, map->type); + + dso__fprintf_symbols_by_name(map->dso, map->type, stdout); + return 0; +} + +static int available_kernel_funcs(const char *module) { struct map *map; int ret; - setup_pager(); - ret = init_vmlinux(); if (ret < 0) return ret; - map = kernel_get_module_map(target); + map = kernel_get_module_map(module); if (!map) { - pr_err("Failed to find %s map.\n", (target) ? : "kernel"); + pr_err("Failed to find %s map.\n", (module) ? : "kernel"); return -EINVAL; } + return __show_available_funcs(map); +} + +static int available_user_funcs(const char *target) +{ + struct map *map; + int ret; + + ret = init_user_exec(); + if (ret < 0) + return ret; + + map = dso__new_map(target); + ret = __show_available_funcs(map); + dso__delete(map->dso); + map__delete(map); + return ret; +} + +int show_available_funcs(const char *target, struct strfilter *_filter, + bool user) +{ + setup_pager(); available_func_filter = _filter; + + if (!user) + return available_kernel_funcs(target); + + return available_user_funcs(target); +} + +/* + * uprobe_events only accepts address: + * Convert function and any offset to address + */ +static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec) +{ + struct perf_probe_point *pp = &pev->point; + struct symbol *sym; + struct map *map = NULL; + char *function = NULL, *name = NULL; + int ret = -EINVAL; + unsigned long long vaddr = 0; + + if (!pp->function) { + pr_warning("No function specified for uprobes"); + goto out; + } + + function = strdup(pp->function); + if (!function) { + pr_warning("Failed to allocate memory by strdup.\n"); + ret = -ENOMEM; + goto out; + } + + name = realpath(exec, NULL); + if (!name) { + pr_warning("Cannot find realpath for %s.\n", exec); + goto out; + } + map = dso__new_map(name); + if (!map) { + pr_warning("Cannot find appropriate DSO for %s.\n", exec); + goto out; + } + available_func_filter = strfilter__new(function, NULL); if (map__load(map, filter_available_functions)) { pr_err("Failed to load map.\n"); - return -EINVAL; + goto out; } - if (!dso__sorted_by_name(map->dso, map->type)) - dso__sort_by_name(map->dso, map->type); - dso__fprintf_symbols_by_name(map->dso, map->type, stdout); - return 0; + sym = map__find_symbol_by_name(map, function, NULL); + if (!sym) { + pr_warning("Cannot find %s in DSO %s\n", function, exec); + goto out; + } + + if (map->start > sym->start) + vaddr = map->start; + vaddr += sym->start + pp->offset + map->pgoff; + pp->offset = 0; + + if (!pev->event) { + pev->event = function; + function = NULL; + } + if (!pev->group) { + char *ptr1, *ptr2; + + pev->group = zalloc(sizeof(char *) * 64); + ptr1 = strdup(basename(exec)); + if (ptr1) { + ptr2 = strpbrk(ptr1, "-._"); + if (ptr2) + *ptr2 = '\0'; + e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP, + ptr1); + free(ptr1); + } + } + free(pp->function); + pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS); + if (!pp->function) { + ret = -ENOMEM; + pr_warning("Failed to allocate memory by zalloc.\n"); + goto out; + } + e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr); + ret = 0; + +out: + if (map) { + dso__delete(map->dso); + map__delete(map); + } + if (function) + free(function); + if (name) + free(name); + return ret; } |