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-rw-r--r--tools/perf/util/probe-event.c123
1 files changed, 79 insertions, 44 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 82b0976..3b6a529 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -74,10 +74,9 @@ static int e_snprintf(char *str, size_t size, const char *format, ...)
static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
static struct machine machine;
-/* Initialize symbol maps and path of vmlinux */
+/* Initialize symbol maps and path of vmlinux/modules */
static int init_vmlinux(void)
{
- struct dso *kernel;
int ret;
symbol_conf.sort_by_name = true;
@@ -91,33 +90,61 @@ static int init_vmlinux(void)
goto out;
}
- ret = machine__init(&machine, "/", 0);
+ ret = machine__init(&machine, "", HOST_KERNEL_ID);
if (ret < 0)
goto out;
- kernel = dso__new_kernel(symbol_conf.vmlinux_name);
- if (kernel == NULL)
- die("Failed to create kernel dso.");
-
- ret = __machine__create_kernel_maps(&machine, kernel);
- if (ret < 0)
- pr_debug("Failed to create kernel maps.\n");
-
+ if (machine__create_kernel_maps(&machine) < 0) {
+ pr_debug("machine__create_kernel_maps ");
+ goto out;
+ }
out:
if (ret < 0)
pr_warning("Failed to init vmlinux path.\n");
return ret;
}
+static struct symbol *__find_kernel_function_by_name(const char *name,
+ struct map **mapp)
+{
+ return machine__find_kernel_function_by_name(&machine, name, mapp,
+ NULL);
+}
+
+const char *kernel_get_module_path(const char *module)
+{
+ struct dso *dso;
+
+ if (module) {
+ list_for_each_entry(dso, &machine.kernel_dsos, node) {
+ if (strncmp(dso->short_name + 1, module,
+ dso->short_name_len - 2) == 0)
+ goto found;
+ }
+ pr_debug("Failed to find module %s.\n", module);
+ return NULL;
+ } else {
+ dso = machine.vmlinux_maps[MAP__FUNCTION]->dso;
+ if (dso__load_vmlinux_path(dso,
+ machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) {
+ pr_debug("Failed to load kernel map.\n");
+ return NULL;
+ }
+ }
+found:
+ return dso->long_name;
+}
+
#ifdef DWARF_SUPPORT
-static int open_vmlinux(void)
+static int open_vmlinux(const char *module)
{
- if (map__load(machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) {
- pr_debug("Failed to load kernel map.\n");
- return -EINVAL;
+ const char *path = kernel_get_module_path(module);
+ if (!path) {
+ pr_err("Failed to find path of %s module", module ?: "kernel");
+ return -ENOENT;
}
- pr_debug("Try to open %s\n", machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name);
- return open(machine.vmlinux_maps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
+ pr_debug("Try to open %s\n", path);
+ return open(path, O_RDONLY);
}
/*
@@ -125,20 +152,19 @@ static int open_vmlinux(void)
* Currently only handles kprobes.
*/
static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
- struct perf_probe_point *pp)
+ struct perf_probe_point *pp)
{
struct symbol *sym;
- int fd, ret = -ENOENT;
+ struct map *map;
+ u64 addr;
+ int ret = -ENOENT;
- sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION],
- tp->symbol, NULL);
+ sym = __find_kernel_function_by_name(tp->symbol, &map);
if (sym) {
- fd = open_vmlinux();
- if (fd >= 0) {
- ret = find_perf_probe_point(fd,
- sym->start + tp->offset, pp);
- close(fd);
- }
+ addr = map->unmap_ip(map, sym->start + tp->offset);
+ pr_debug("try to find %s+%ld@%llx\n", tp->symbol,
+ tp->offset, addr);
+ ret = find_perf_probe_point((unsigned long)addr, pp);
}
if (ret <= 0) {
pr_debug("Failed to find corresponding probes from "
@@ -156,12 +182,12 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
/* Try to find perf_probe_event with debuginfo */
static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
struct probe_trace_event **tevs,
- int max_tevs)
+ int max_tevs, const char *module)
{
bool need_dwarf = perf_probe_event_need_dwarf(pev);
int fd, ntevs;
- fd = open_vmlinux();
+ fd = open_vmlinux(module);
if (fd < 0) {
if (need_dwarf) {
pr_warning("Failed to open debuginfo file.\n");
@@ -300,7 +326,7 @@ error:
* Show line-range always requires debuginfo to find source file and
* line number.
*/
-int show_line_range(struct line_range *lr)
+int show_line_range(struct line_range *lr, const char *module)
{
int l = 1;
struct line_node *ln;
@@ -313,7 +339,7 @@ int show_line_range(struct line_range *lr)
if (ret < 0)
return ret;
- fd = open_vmlinux();
+ fd = open_vmlinux(module);
if (fd < 0) {
pr_warning("Failed to open debuginfo file.\n");
return fd;
@@ -421,7 +447,7 @@ static int show_available_vars_at(int fd, struct perf_probe_event *pev,
/* Show available variables on given probe point */
int show_available_vars(struct perf_probe_event *pevs, int npevs,
- int max_vls, bool externs)
+ int max_vls, const char *module, bool externs)
{
int i, fd, ret = 0;
@@ -429,7 +455,7 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
if (ret < 0)
return ret;
- fd = open_vmlinux();
+ fd = open_vmlinux(module);
if (fd < 0) {
pr_warning("Failed to open debuginfo file.\n");
return fd;
@@ -447,8 +473,15 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
#else /* !DWARF_SUPPORT */
static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
- struct perf_probe_point *pp)
+ struct perf_probe_point *pp)
{
+ struct symbol *sym;
+
+ sym = __find_kernel_function_by_name(tp->symbol, NULL);
+ if (!sym) {
+ 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;
@@ -460,7 +493,7 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
struct probe_trace_event **tevs __unused,
- int max_tevs __unused)
+ int max_tevs __unused, const char *mod __unused)
{
if (perf_probe_event_need_dwarf(pev)) {
pr_warning("Debuginfo-analysis is not supported.\n");
@@ -469,14 +502,15 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
return 0;
}
-int show_line_range(struct line_range *lr __unused)
+int show_line_range(struct line_range *lr __unused, const char *module __unused)
{
pr_warning("Debuginfo-analysis is not supported.\n");
return -ENOSYS;
}
int show_available_vars(struct perf_probe_event *pevs __unused,
- int npevs __unused, int max_probe_points __unused)
+ int npevs __unused, int max_vls __unused,
+ const char *module __unused, bool externs __unused)
{
pr_warning("Debuginfo-analysis is not supported.\n");
return -ENOSYS;
@@ -1159,7 +1193,7 @@ error:
}
static int convert_to_perf_probe_event(struct probe_trace_event *tev,
- struct perf_probe_event *pev)
+ struct perf_probe_event *pev)
{
char buf[64] = "";
int i, ret;
@@ -1588,14 +1622,14 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
static int convert_to_probe_trace_events(struct perf_probe_event *pev,
struct probe_trace_event **tevs,
- int max_tevs)
+ int max_tevs, const char *module)
{
struct symbol *sym;
int ret = 0, i;
struct probe_trace_event *tev;
/* Convert perf_probe_event with debuginfo */
- ret = try_to_find_probe_trace_events(pev, tevs, max_tevs);
+ ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module);
if (ret != 0)
return ret;
@@ -1644,8 +1678,7 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev,
}
/* Currently just checking function name from symbol map */
- sym = map__find_symbol_by_name(machine.vmlinux_maps[MAP__FUNCTION],
- tev->point.symbol, NULL);
+ sym = __find_kernel_function_by_name(tev->point.symbol, NULL);
if (!sym) {
pr_warning("Kernel symbol \'%s\' not found.\n",
tev->point.symbol);
@@ -1668,7 +1701,7 @@ struct __event_package {
};
int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
- int max_tevs, bool force_add)
+ int max_tevs, const char *module, bool force_add)
{
int i, j, ret;
struct __event_package *pkgs;
@@ -1689,7 +1722,9 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
pkgs[i].pev = &pevs[i];
/* Convert with or without debuginfo */
ret = convert_to_probe_trace_events(pkgs[i].pev,
- &pkgs[i].tevs, max_tevs);
+ &pkgs[i].tevs,
+ max_tevs,
+ module);
if (ret < 0)
goto end;
pkgs[i].ntevs = ret;
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