static struct dso *dsos__findnew(const char *name)
{
struct dso *dso = dsos__find(name);
int nr;
if (dso)
return dso;
dso = dso__new(name, 0);
if (!dso)
goto out_delete_dso;
nr = dso__load(dso, NULL, verbose);
if (nr < 0) {
if (verbose)
fprintf(stderr, "Failed to open: %s\n", name);
goto out_delete_dso;
}
if (!nr && verbose) {
fprintf(stderr,
"No symbols found in: %s, maybe install a debug package?\n",
name);
}
dsos__add(dso);
return dso;
out_delete_dso:
dso__delete(dso);
return NULL;
}
int map__load(struct map *map, symbol_filter_t filter)
{
const char *name = map->dso->long_name;
int nr;
if (dso__loaded(map->dso, map->type))
return 0;
nr = dso__load(map->dso, map, filter);
if (nr < 0) {
if (map->dso->has_build_id) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
build_id__sprintf(map->dso->build_id,
sizeof(map->dso->build_id),
sbuild_id);
pr_warning("%s with build id %s not found",
name, sbuild_id);
} else
pr_warning("Failed to open %s", name);
pr_warning(", continuing without symbols\n");
return -1;
} else if (nr == 0) {
#ifdef LIBELF_SUPPORT
const size_t len = strlen(name);
const size_t real_len = len - sizeof(DSO__DELETED);
if (len > sizeof(DSO__DELETED) &&
strcmp(name + real_len + 1, DSO__DELETED) == 0) {
pr_warning("%.*s was updated (is prelink enabled?). "
"Restart the long running apps that use it!\n",
(int)real_len, name);
} else {
pr_warning("no symbols found in %s, maybe install "
"a debug package?\n", name);
}
#endif
return -1;
}
/*
* Only applies to the kernel, as its symtabs aren't relative like the
* module ones.
*/
if (map->dso->kernel)
map__reloc_vmlinux(map);
return 0;
}
int map__load(struct map *self, symbol_filter_t filter)
{
const char *name = self->dso->long_name;
int nr;
if (dso__loaded(self->dso, self->type))
return 0;
nr = dso__load(self->dso, self, filter);
if (nr < 0) {
if (self->dso->has_build_id) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
build_id__sprintf(self->dso->build_id,
sizeof(self->dso->build_id),
sbuild_id);
pr_warning("%s with build id %s not found",
name, sbuild_id);
} else
pr_warning("Failed to open %s", name);
pr_warning(", continuing without symbols\n");
return -1;
} else if (nr == 0) {
const size_t len = strlen(name);
const size_t real_len = len - sizeof(DSO__DELETED);
if (len > sizeof(DSO__DELETED) &&
strcmp(name + real_len + 1, DSO__DELETED) == 0) {
pr_warning("%.*s was updated (is prelink enabled?). "
"Restart the long running apps that use it!\n",
(int)real_len, name);
} else {
pr_warning("no symbols found in %s, maybe install "
"a debug package?\n", name);
}
return -1;
}
if (self->dso->kernel)
map__reloc_vmlinux(self);
return 0;
}
struct symbol *map__find_symbol(struct map *self, u64 addr,
symbol_filter_t filter)
{
if (!dso__loaded(self->dso, self->type)) {
int nr = dso__load(self->dso, self, filter);
if (nr < 0) {
if (self->dso->has_build_id) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
build_id__sprintf(self->dso->build_id,
sizeof(self->dso->build_id),
sbuild_id);
pr_warning("%s with build id %s not found",
self->dso->long_name, sbuild_id);
} else
pr_warning("Failed to open %s",
self->dso->long_name);
pr_warning(", continuing without symbols\n");
return NULL;
} else if (nr == 0) {
const char *name = self->dso->long_name;
const size_t len = strlen(name);
const size_t real_len = len - sizeof(DSO__DELETED);
if (len > sizeof(DSO__DELETED) &&
strcmp(name + real_len + 1, DSO__DELETED) == 0) {
pr_warning("%.*s was updated, restart the long running apps that use it!\n",
(int)real_len, name);
} else {
pr_warning("no symbols found in %s, maybe install a debug package?\n", name);
}
return NULL;
}
}
return self->dso->find_symbol(self->dso, self->type, addr);
}
static int event__process_kernel_mmap(event_t *self,
struct perf_session *session)
{
struct map *map;
char kmmap_prefix[PATH_MAX];
struct machine *machine;
enum dso_kernel_type kernel_type;
bool is_kernel_mmap;
machine = perf_session__findnew_machine(session, self->mmap.pid);
if (!machine) {
pr_err("Can't find id %d's machine\n", self->mmap.pid);
goto out_problem;
}
machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
if (machine__is_host(machine))
kernel_type = DSO_TYPE_KERNEL;
else
kernel_type = DSO_TYPE_GUEST_KERNEL;
is_kernel_mmap = memcmp(self->mmap.filename,
kmmap_prefix,
strlen(kmmap_prefix)) == 0;
if (self->mmap.filename[0] == '/' ||
(!is_kernel_mmap && self->mmap.filename[0] == '[')) {
char short_module_name[1024];
char *name, *dot;
if (self->mmap.filename[0] == '/') {
name = strrchr(self->mmap.filename, '/');
if (name == NULL)
goto out_problem;
++name; /* skip / */
dot = strrchr(name, '.');
if (dot == NULL)
goto out_problem;
snprintf(short_module_name, sizeof(short_module_name),
"[%.*s]", (int)(dot - name), name);
strxfrchar(short_module_name, '-', '_');
} else
strcpy(short_module_name, self->mmap.filename);
map = machine__new_module(machine, self->mmap.start,
self->mmap.filename);
if (map == NULL)
goto out_problem;
name = strdup(short_module_name);
if (name == NULL)
goto out_problem;
map->dso->short_name = name;
map->end = map->start + self->mmap.len;
} else if (is_kernel_mmap) {
const char *symbol_name = (self->mmap.filename +
strlen(kmmap_prefix));
/*
* Should be there already, from the build-id table in
* the header.
*/
struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
kmmap_prefix);
if (kernel == NULL)
goto out_problem;
kernel->kernel = kernel_type;
if (__machine__create_kernel_maps(machine, kernel) < 0)
goto out_problem;
event_set_kernel_mmap_len(machine->vmlinux_maps, self);
perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
symbol_name,
self->mmap.pgoff);
if (machine__is_default_guest(machine)) {
/*
* preload dso of guest kernel and modules
*/
dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
NULL);
}
}
return 0;
out_problem:
return -1;
}