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-rw-r--r--tools/perf/util/header.c21
-rw-r--r--tools/perf/util/probe-event.c15
-rw-r--r--tools/perf/util/probe-finder.c85
-rw-r--r--tools/perf/util/string.c2
-rw-r--r--tools/perf/util/symbol.c63
-rw-r--r--tools/perf/util/symbol.h2
6 files changed, 139 insertions, 49 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d7e67b167ea..7cba0551a56 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -265,15 +265,16 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
const char *name, bool is_kallsyms)
{
const size_t size = PATH_MAX;
- char *filename = malloc(size),
+ char *realname = realpath(name, NULL),
+ *filename = malloc(size),
*linkname = malloc(size), *targetname;
int len, err = -1;
- if (filename == NULL || linkname == NULL)
+ if (realname == NULL || filename == NULL || linkname == NULL)
goto out_free;
len = snprintf(filename, size, "%s%s%s",
- debugdir, is_kallsyms ? "/" : "", name);
+ debugdir, is_kallsyms ? "/" : "", realname);
if (mkdir_p(filename, 0755))
goto out_free;
@@ -283,7 +284,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
if (is_kallsyms) {
if (copyfile("/proc/kallsyms", filename))
goto out_free;
- } else if (link(name, filename) && copyfile(name, filename))
+ } else if (link(realname, filename) && copyfile(name, filename))
goto out_free;
}
@@ -300,6 +301,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
if (symlink(targetname, linkname) == 0)
err = 0;
out_free:
+ free(realname);
free(filename);
free(linkname);
return err;
@@ -946,11 +948,16 @@ perf_header__find_attr(u64 id, struct perf_header *header)
/*
* We set id to -1 if the data file doesn't contain sample
- * ids. Check for this and avoid walking through the entire
- * list of ids which may be large.
+ * ids. This can happen when the data file contains one type
+ * of event and in that case, the header can still store the
+ * event attribute information. Check for this and avoid
+ * walking through the entire list of ids which may be large.
*/
- if (id == -1ULL)
+ if (id == -1ULL) {
+ if (header->attrs > 0)
+ return &header->attr[0]->attr;
return NULL;
+ }
for (i = 0; i < header->attrs; i++) {
struct perf_header_attr *attr = header->attr[i];
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 3b6a5297bf1..61191c6cbe7 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -114,6 +114,8 @@ static struct symbol *__find_kernel_function_by_name(const char *name,
const char *kernel_get_module_path(const char *module)
{
struct dso *dso;
+ struct map *map;
+ const char *vmlinux_name;
if (module) {
list_for_each_entry(dso, &machine.kernel_dsos, node) {
@@ -123,10 +125,17 @@ const char *kernel_get_module_path(const char *module)
}
pr_debug("Failed to find module %s.\n", module);
return NULL;
+ }
+
+ map = machine.vmlinux_maps[MAP__FUNCTION];
+ dso = map->dso;
+
+ vmlinux_name = symbol_conf.vmlinux_name;
+ if (vmlinux_name) {
+ if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0)
+ return NULL;
} else {
- dso = machine.vmlinux_maps[MAP__FUNCTION]->dso;
- if (dso__load_vmlinux_path(dso,
- machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) {
+ if (dso__load_vmlinux_path(dso, map, NULL) <= 0) {
pr_debug("Failed to load kernel map.\n");
return NULL;
}
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 3991d73d1cf..ddf4d455632 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -117,28 +117,6 @@ static void line_list__free(struct list_head *head)
}
/* Dwarf FL wrappers */
-
-static int __linux_kernel_find_elf(Dwfl_Module *mod,
- void **userdata,
- const char *module_name,
- Dwarf_Addr base,
- char **file_name, Elf **elfp)
-{
- int fd;
- const char *path = kernel_get_module_path(module_name);
-
- if (path) {
- fd = open(path, O_RDONLY);
- if (fd >= 0) {
- *file_name = strdup(path);
- return fd;
- }
- }
- /* If failed, try to call standard method */
- return dwfl_linux_kernel_find_elf(mod, userdata, module_name, base,
- file_name, elfp);
-}
-
static char *debuginfo_path; /* Currently dummy */
static const Dwfl_Callbacks offline_callbacks = {
@@ -151,14 +129,6 @@ static const Dwfl_Callbacks offline_callbacks = {
.find_elf = dwfl_build_id_find_elf,
};
-static const Dwfl_Callbacks kernel_callbacks = {
- .find_debuginfo = dwfl_standard_find_debuginfo,
- .debuginfo_path = &debuginfo_path,
-
- .find_elf = __linux_kernel_find_elf,
- .section_address = dwfl_linux_kernel_module_section_address,
-};
-
/* Get a Dwarf from offline image */
static Dwarf *dwfl_init_offline_dwarf(int fd, Dwfl **dwflp, Dwarf_Addr *bias)
{
@@ -185,6 +155,38 @@ error:
return dbg;
}
+#if _ELFUTILS_PREREQ(0, 148)
+/* This method is buggy if elfutils is older than 0.148 */
+static int __linux_kernel_find_elf(Dwfl_Module *mod,
+ void **userdata,
+ const char *module_name,
+ Dwarf_Addr base,
+ char **file_name, Elf **elfp)
+{
+ int fd;
+ const char *path = kernel_get_module_path(module_name);
+
+ pr_debug2("Use file %s for %s\n", path, module_name);
+ if (path) {
+ fd = open(path, O_RDONLY);
+ if (fd >= 0) {
+ *file_name = strdup(path);
+ return fd;
+ }
+ }
+ /* If failed, try to call standard method */
+ return dwfl_linux_kernel_find_elf(mod, userdata, module_name, base,
+ file_name, elfp);
+}
+
+static const Dwfl_Callbacks kernel_callbacks = {
+ .find_debuginfo = dwfl_standard_find_debuginfo,
+ .debuginfo_path = &debuginfo_path,
+
+ .find_elf = __linux_kernel_find_elf,
+ .section_address = dwfl_linux_kernel_module_section_address,
+};
+
/* Get a Dwarf from live kernel image */
static Dwarf *dwfl_init_live_kernel_dwarf(Dwarf_Addr addr, Dwfl **dwflp,
Dwarf_Addr *bias)
@@ -205,11 +207,34 @@ static Dwarf *dwfl_init_live_kernel_dwarf(Dwarf_Addr addr, Dwfl **dwflp,
dbg = dwfl_addrdwarf(*dwflp, addr, bias);
/* Here, check whether we could get a real dwarf */
if (!dbg) {
+ pr_debug("Failed to find kernel dwarf at %lx\n",
+ (unsigned long)addr);
dwfl_end(*dwflp);
*dwflp = NULL;
}
return dbg;
}
+#else
+/* With older elfutils, this just support kernel module... */
+static Dwarf *dwfl_init_live_kernel_dwarf(Dwarf_Addr addr __used, Dwfl **dwflp,
+ Dwarf_Addr *bias)
+{
+ int fd;
+ const char *path = kernel_get_module_path("kernel");
+
+ if (!path) {
+ pr_err("Failed to find vmlinux path\n");
+ return NULL;
+ }
+
+ pr_debug2("Use file %s for debuginfo\n", path);
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return NULL;
+
+ return dwfl_init_offline_dwarf(fd, dwflp, bias);
+}
+#endif
/* Dwarf wrappers */
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index 0409fc7c005..8fc0bd3a3a4 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -259,7 +259,7 @@ static bool __match_glob(const char *str, const char *pat, bool ignore_space)
if (!*pat) /* Tail wild card matches all */
return true;
while (*str)
- if (strglobmatch(str++, pat))
+ if (__match_glob(str++, pat, ignore_space))
return true;
}
return !*str && !*pat;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 0500895a45a..439ab947daf 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -532,7 +532,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
struct machine *machine = kmaps->machine;
struct map *curr_map = map;
struct symbol *pos;
- int count = 0;
+ int count = 0, moved = 0;
struct rb_root *root = &self->symbols[map->type];
struct rb_node *next = rb_first(root);
int kernel_range = 0;
@@ -590,6 +590,11 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
char dso_name[PATH_MAX];
struct dso *dso;
+ if (count == 0) {
+ curr_map = map;
+ goto filter_symbol;
+ }
+
if (self->kernel == DSO_TYPE_GUEST_KERNEL)
snprintf(dso_name, sizeof(dso_name),
"[guest.kernel].%d",
@@ -615,7 +620,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
map_groups__insert(kmaps, curr_map);
++kernel_range;
}
-
+filter_symbol:
if (filter && filter(curr_map, pos)) {
discard_symbol: rb_erase(&pos->rb_node, root);
symbol__delete(pos);
@@ -623,8 +628,9 @@ discard_symbol: rb_erase(&pos->rb_node, root);
if (curr_map != map) {
rb_erase(&pos->rb_node, root);
symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
- }
- count++;
+ ++moved;
+ } else
+ ++count;
}
}
@@ -634,7 +640,7 @@ discard_symbol: rb_erase(&pos->rb_node, root);
dso__set_loaded(curr_map->dso, curr_map->type);
}
- return count;
+ return count + moved;
}
int dso__load_kallsyms(struct dso *self, const char *filename,
@@ -1774,8 +1780,8 @@ out_failure:
return -1;
}
-static int dso__load_vmlinux(struct dso *self, struct map *map,
- const char *vmlinux, symbol_filter_t filter)
+int dso__load_vmlinux(struct dso *self, struct map *map,
+ const char *vmlinux, symbol_filter_t filter)
{
int err = -1, fd;
@@ -2125,14 +2131,55 @@ static struct dso *machine__create_kernel(struct machine *self)
return kernel;
}
+struct process_args {
+ u64 start;
+};
+
+static int symbol__in_kernel(void *arg, const char *name,
+ char type __used, u64 start)
+{
+ struct process_args *args = arg;
+
+ if (strchr(name, '['))
+ return 0;
+
+ args->start = start;
+ return 1;
+}
+
+/* Figure out the start address of kernel map from /proc/kallsyms */
+static u64 machine__get_kernel_start_addr(struct machine *machine)
+{
+ const char *filename;
+ char path[PATH_MAX];
+ struct process_args args;
+
+ if (machine__is_host(machine)) {
+ filename = "/proc/kallsyms";
+ } else {
+ if (machine__is_default_guest(machine))
+ filename = (char *)symbol_conf.default_guest_kallsyms;
+ else {
+ sprintf(path, "%s/proc/kallsyms", machine->root_dir);
+ filename = path;
+ }
+ }
+
+ if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
+ return 0;
+
+ return args.start;
+}
+
int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
{
enum map_type type;
+ u64 start = machine__get_kernel_start_addr(self);
for (type = 0; type < MAP__NR_TYPES; ++type) {
struct kmap *kmap;
- self->vmlinux_maps[type] = map__new2(0, kernel, type);
+ self->vmlinux_maps[type] = map__new2(start, kernel, type);
if (self->vmlinux_maps[type] == NULL)
return -1;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 038f2201ee0..6c6eafdb932 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -166,6 +166,8 @@ void dso__sort_by_name(struct dso *self, enum map_type type);
struct dso *__dsos__findnew(struct list_head *head, const char *name);
int dso__load(struct dso *self, struct map *map, symbol_filter_t filter);
+int dso__load_vmlinux(struct dso *self, struct map *map,
+ const char *vmlinux, symbol_filter_t filter);
int dso__load_vmlinux_path(struct dso *self, struct map *map,
symbol_filter_t filter);
int dso__load_kallsyms(struct dso *self, const char *filename, struct map *map,
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-03 15:48:45 +0000