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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-24 11:39:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-24 11:39:34 -0700
commit654443e20dfc0617231f28a07c96a979ee1a0239 (patch)
treea0dc3f093eb13892539082e663607c34b4fc2d07 /tools
parent2c01e7bc46f10e9190818437e564f7e0db875ae9 (diff)
parent9cba26e66d09bf394ae5a739627a1dc8b7cae6f4 (diff)
downloadop-kernel-dev-654443e20dfc0617231f28a07c96a979ee1a0239.zip
op-kernel-dev-654443e20dfc0617231f28a07c96a979ee1a0239.tar.gz
Merge branch 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull user-space probe instrumentation from Ingo Molnar: "The uprobes code originates from SystemTap and has been used for years in Fedora and RHEL kernels. This version is much rewritten, reviews from PeterZ, Oleg and myself shaped the end result. This tree includes uprobes support in 'perf probe' - but SystemTap (and other tools) can take advantage of user probe points as well. Sample usage of uprobes via perf, for example to profile malloc() calls without modifying user-space binaries. First boot a new kernel with CONFIG_UPROBE_EVENT=y enabled. If you don't know which function you want to probe you can pick one from 'perf top' or can get a list all functions that can be probed within libc (binaries can be specified as well): $ perf probe -F -x /lib/libc.so.6 To probe libc's malloc(): $ perf probe -x /lib64/libc.so.6 malloc Added new event: probe_libc:malloc (on 0x7eac0) You can now use it in all perf tools, such as: perf record -e probe_libc:malloc -aR sleep 1 Make use of it to create a call graph (as the flat profile is going to look very boring): $ perf record -e probe_libc:malloc -gR make [ perf record: Woken up 173 times to write data ] [ perf record: Captured and wrote 44.190 MB perf.data (~1930712 $ perf report | less 32.03% git libc-2.15.so [.] malloc | --- malloc 29.49% cc1 libc-2.15.so [.] malloc | --- malloc | |--0.95%-- 0x208eb1000000000 | |--0.63%-- htab_traverse_noresize 11.04% as libc-2.15.so [.] malloc | --- malloc | 7.15% ld libc-2.15.so [.] malloc | --- malloc | 5.07% sh libc-2.15.so [.] malloc | --- malloc | 4.99% python-config libc-2.15.so [.] malloc | --- malloc | 4.54% make libc-2.15.so [.] malloc | --- malloc | |--7.34%-- glob | | | |--93.18%-- 0x41588f | | | --6.82%-- glob | 0x41588f ... Or: $ perf report -g flat | less # Overhead Command Shared Object Symbol # ........ ............. ............. .......... # 32.03% git libc-2.15.so [.] malloc 27.19% malloc 29.49% cc1 libc-2.15.so [.] malloc 24.77% malloc 11.04% as libc-2.15.so [.] malloc 11.02% malloc 7.15% ld libc-2.15.so [.] malloc 6.57% malloc ... The core uprobes design is fairly straightforward: uprobes probe points register themselves at (inode:offset) addresses of libraries/binaries, after which all existing (or new) vmas that map that address will have a software breakpoint injected at that address. vmas are COW-ed to preserve original content. The probe points are kept in an rbtree. If user-space executes the probed inode:offset instruction address then an event is generated which can be recovered from the regular perf event channels and mmap-ed ring-buffer. Multiple probes at the same address are supported, they create a dynamic callback list of event consumers. The basic model is further complicated by the XOL speedup: the original instruction that is probed is copied (in an architecture specific fashion) and executed out of line when the probe triggers. The XOL area is a single vma per process, with a fixed number of entries (which limits probe execution parallelism). The API: uprobes are installed/removed via /sys/kernel/debug/tracing/uprobe_events, the API is integrated to align with the kprobes interface as much as possible, but is separate to it. Injecting a probe point is privileged operation, which can be relaxed by setting perf_paranoid to -1. You can use multiple probes as well and mix them with kprobes and regular PMU events or tracepoints, when instrumenting a task." Fix up trivial conflicts in mm/memory.c due to previous cleanup of unmap_single_vma(). * 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) perf probe: Detect probe target when m/x options are absent perf probe: Provide perf interface for uprobes tracing: Fix kconfig warning due to a typo tracing: Provide trace events interface for uprobes tracing: Extract out common code for kprobes/uprobes trace events tracing: Modify is_delete, is_return from int to bool uprobes/core: Decrement uprobe count before the pages are unmapped uprobes/core: Make background page replacement logic account for rss_stat counters uprobes/core: Optimize probe hits with the help of a counter uprobes/core: Allocate XOL slots for uprobes use uprobes/core: Handle breakpoint and singlestep exceptions uprobes/core: Rename bkpt to swbp uprobes/core: Make order of function parameters consistent across functions uprobes/core: Make macro names consistent uprobes: Update copyright notices uprobes/core: Move insn to arch specific structure uprobes/core: Remove uprobe_opcode_sz uprobes/core: Make instruction tables volatile uprobes: Move to kernel/events/ uprobes/core: Clean up, refactor and improve the code ...
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-probe.txt19
-rw-r--r--tools/perf/builtin-probe.c86
-rw-r--r--tools/perf/util/probe-event.c422
-rw-r--r--tools/perf/util/probe-event.h12
-rw-r--r--tools/perf/util/symbol.c8
-rw-r--r--tools/perf/util/symbol.h1
6 files changed, 447 insertions, 101 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 2780d9c..b715cb7 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -77,7 +77,8 @@ OPTIONS
-F::
--funcs::
- Show available functions in given module or kernel.
+ Show available functions in given module or kernel. With -x/--exec,
+ can also list functions in a user space executable / shared library.
--filter=FILTER::
(Only for --vars and --funcs) Set filter. FILTER is a combination of glob
@@ -98,6 +99,15 @@ OPTIONS
--max-probes::
Set the maximum number of probe points for an event. Default is 128.
+-x::
+--exec=PATH::
+ Specify path to the executable or shared library file for user
+ space tracing. Can also be used with --funcs option.
+
+In absence of -m/-x options, perf probe checks if the first argument after
+the options is an absolute path name. If its an absolute path, perf probe
+uses it as a target module/target user space binary to probe.
+
PROBE SYNTAX
------------
Probe points are defined by following syntax.
@@ -182,6 +192,13 @@ Delete all probes on schedule().
./perf probe --del='schedule*'
+Add probes at zfree() function on /bin/zsh
+
+ ./perf probe -x /bin/zsh zfree or ./perf probe /bin/zsh zfree
+
+Add probes at malloc() function on libc
+
+ ./perf probe -x /lib/libc.so.6 malloc or ./perf probe /lib/libc.so.6 malloc
SEE ALSO
--------
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 4935c09..e215ae6 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -54,6 +54,7 @@ static struct {
bool show_ext_vars;
bool show_funcs;
bool mod_events;
+ bool uprobes;
int nevents;
struct perf_probe_event events[MAX_PROBES];
struct strlist *dellist;
@@ -75,6 +76,8 @@ static int parse_probe_event(const char *str)
return -1;
}
+ pev->uprobes = params.uprobes;
+
/* Parse a perf-probe command into event */
ret = parse_perf_probe_command(str, pev);
pr_debug("%d arguments\n", pev->nargs);
@@ -82,21 +85,58 @@ static int parse_probe_event(const char *str)
return ret;
}
+static int set_target(const char *ptr)
+{
+ int found = 0;
+ const char *buf;
+
+ /*
+ * The first argument after options can be an absolute path
+ * to an executable / library or kernel module.
+ *
+ * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH,
+ * short module name.
+ */
+ if (!params.target && ptr && *ptr == '/') {
+ params.target = ptr;
+ found = 1;
+ buf = ptr + (strlen(ptr) - 3);
+
+ if (strcmp(buf, ".ko"))
+ params.uprobes = true;
+
+ }
+
+ return found;
+}
+
static int parse_probe_event_argv(int argc, const char **argv)
{
- int i, len, ret;
+ int i, len, ret, found_target;
char *buf;
+ found_target = set_target(argv[0]);
+ if (found_target && argc == 1)
+ return 0;
+
/* Bind up rest arguments */
len = 0;
- for (i = 0; i < argc; i++)
+ for (i = 0; i < argc; i++) {
+ if (i == 0 && found_target)
+ continue;
+
len += strlen(argv[i]) + 1;
+ }
buf = zalloc(len + 1);
if (buf == NULL)
return -ENOMEM;
len = 0;
- for (i = 0; i < argc; i++)
+ for (i = 0; i < argc; i++) {
+ if (i == 0 && found_target)
+ continue;
+
len += sprintf(&buf[len], "%s ", argv[i]);
+ }
params.mod_events = true;
ret = parse_probe_event(buf);
free(buf);
@@ -125,6 +165,28 @@ static int opt_del_probe_event(const struct option *opt __used,
return 0;
}
+static int opt_set_target(const struct option *opt, const char *str,
+ int unset __used)
+{
+ int ret = -ENOENT;
+
+ if (str && !params.target) {
+ if (!strcmp(opt->long_name, "exec"))
+ params.uprobes = true;
+#ifdef DWARF_SUPPORT
+ else if (!strcmp(opt->long_name, "module"))
+ params.uprobes = false;
+#endif
+ else
+ return ret;
+
+ params.target = str;
+ ret = 0;
+ }
+
+ return ret;
+}
+
#ifdef DWARF_SUPPORT
static int opt_show_lines(const struct option *opt __used,
const char *str, int unset __used)
@@ -246,9 +308,9 @@ static const struct option options[] = {
"file", "vmlinux pathname"),
OPT_STRING('s', "source", &symbol_conf.source_prefix,
"directory", "path to kernel source"),
- OPT_STRING('m', "module", &params.target,
- "modname|path",
- "target module name (for online) or path (for offline)"),
+ OPT_CALLBACK('m', "module", NULL, "modname|path",
+ "target module name (for online) or path (for offline)",
+ opt_set_target),
#endif
OPT__DRY_RUN(&probe_event_dry_run),
OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
@@ -260,6 +322,8 @@ static const struct option options[] = {
"\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
"\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
opt_set_filter),
+ OPT_CALLBACK('x', "exec", NULL, "executable|path",
+ "target executable name or path", opt_set_target),
OPT_END()
};
@@ -310,6 +374,10 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
pr_err(" Error: Don't use --list with --funcs.\n");
usage_with_options(probe_usage, options);
}
+ if (params.uprobes) {
+ pr_warning(" Error: Don't use --list with --exec.\n");
+ usage_with_options(probe_usage, options);
+ }
ret = show_perf_probe_events();
if (ret < 0)
pr_err(" Error: Failed to show event list. (%d)\n",
@@ -333,8 +401,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
if (!params.filter)
params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
NULL);
- ret = show_available_funcs(params.target,
- params.filter);
+ ret = show_available_funcs(params.target, params.filter,
+ params.uprobes);
strfilter__delete(params.filter);
if (ret < 0)
pr_err(" Error: Failed to show functions."
@@ -343,7 +411,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
}
#ifdef DWARF_SUPPORT
- if (params.show_lines) {
+ if (params.show_lines && !params.uprobes) {
if (params.mod_events) {
pr_err(" Error: Don't use --line with"
" --add/--del.\n");
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 8a8ee64..59dccc9 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;
}
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index a7dee83..f9f3de8 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -7,7 +7,7 @@
extern bool probe_event_dry_run;
-/* kprobe-tracer tracing point */
+/* kprobe-tracer and uprobe-tracer tracing point */
struct probe_trace_point {
char *symbol; /* Base symbol */
char *module; /* Module name */
@@ -21,7 +21,7 @@ struct probe_trace_arg_ref {
long offset; /* Offset value */
};
-/* kprobe-tracer tracing argument */
+/* kprobe-tracer and uprobe-tracer tracing argument */
struct probe_trace_arg {
char *name; /* Argument name */
char *value; /* Base value */
@@ -29,12 +29,13 @@ struct probe_trace_arg {
struct probe_trace_arg_ref *ref; /* Referencing offset */
};
-/* kprobe-tracer tracing event (point + arg) */
+/* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
struct probe_trace_event {
char *event; /* Event name */
char *group; /* Group name */
struct probe_trace_point point; /* Trace point */
int nargs; /* Number of args */
+ bool uprobes; /* uprobes only */
struct probe_trace_arg *args; /* Arguments */
};
@@ -70,6 +71,7 @@ struct perf_probe_event {
char *group; /* Group name */
struct perf_probe_point point; /* Probe point */
int nargs; /* Number of arguments */
+ bool uprobes;
struct perf_probe_arg *args; /* Arguments */
};
@@ -129,8 +131,8 @@ extern int show_line_range(struct line_range *lr, const char *module);
extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
int max_probe_points, const char *module,
struct strfilter *filter, bool externs);
-extern int show_available_funcs(const char *module, struct strfilter *filter);
-
+extern int show_available_funcs(const char *module, struct strfilter *filter,
+ bool user);
/* Maximum index number of event-name postfix */
#define MAX_EVENT_INDEX 1024
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index ab9867b..e2ba885 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -2783,3 +2783,11 @@ int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
return ret;
}
+
+struct map *dso__new_map(const char *name)
+{
+ struct dso *dso = dso__new(name);
+ struct map *map = map__new2(0, dso, MAP__FUNCTION);
+
+ return map;
+}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 1f00388..5649d63 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -242,6 +242,7 @@ void dso__set_long_name(struct dso *dso, char *name);
void dso__set_build_id(struct dso *dso, void *build_id);
void dso__read_running_kernel_build_id(struct dso *dso,
struct machine *machine);
+struct map *dso__new_map(const char *name);
struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
u64 addr);
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
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