struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
u64 ino_gen, char *filename,
enum map_type type)
{
struct map *map = malloc(sizeof(*map));
if (map != NULL) {
char newfilename[PATH_MAX];
struct dso *dso;
int anon, no_dso, vdso;
anon = is_anon_memory(filename);
vdso = is_vdso_map(filename);
no_dso = is_no_dso_memory(filename);
map->maj = d_maj;
map->min = d_min;
map->ino = ino;
map->ino_generation = ino_gen;
if ((anon || no_dso) && type == MAP__FUNCTION) {
snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
filename = newfilename;
}
if (vdso) {
pgoff = 0;
dso = vdso__dso_findnew(dsos__list);
} else
dso = __dsos__findnew(dsos__list, filename);
if (dso == NULL)
goto out_delete;
map__init(map, type, start, start + len, pgoff, dso);
if (anon || no_dso) {
map->map_ip = map->unmap_ip = identity__map_ip;
/*
* Set memory without DSO as loaded. All map__find_*
* functions still return NULL, and we avoid the
* unnecessary map__load warning.
*/
if (type != MAP__FUNCTION)
dso__set_loaded(dso, map->type);
}
}
return map;
out_delete:
free(map);
return NULL;
}
struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
u64 pgoff, u32 pid, char *filename,
enum map_type type)
{
struct map *self = malloc(sizeof(*self));
if (self != NULL) {
char newfilename[PATH_MAX];
struct dso *dso;
int anon, no_dso;
anon = is_anon_memory(filename);
no_dso = is_no_dso_memory(filename);
if (anon) {
snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
filename = newfilename;
}
dso = __dsos__findnew(dsos__list, filename);
if (dso == NULL)
goto out_delete;
map__init(self, type, start, start + len, pgoff, dso);
if (anon || no_dso) {
self->map_ip = self->unmap_ip = identity__map_ip;
/*
* Set memory without DSO as loaded. All map__find_*
* functions still return NULL, and we avoid the
* unnecessary map__load warning.
*/
if (no_dso)
dso__set_loaded(dso, self->type);
}
}
return self;
out_delete:
free(self);
return NULL;
}
struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
u64 pgoff, u32 pid, char *filename,
enum map_type type)
{
struct map *self = malloc(sizeof(*self));
if (self != NULL) {
char newfilename[PATH_MAX];
struct dso *dso;
int anon;
anon = is_anon_memory(filename);
if (anon) {
snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
filename = newfilename;
}
dso = __dsos__findnew(dsos__list, filename);
if (dso == NULL)
goto out_delete;
map__init(self, type, start, start + len, pgoff, dso);
if (anon) {
set_identity:
self->map_ip = self->unmap_ip = identity__map_ip;
} else if (strcmp(filename, "[vdso]") == 0) {
dso__set_loaded(dso, self->type);
goto set_identity;
}
}
return self;
out_delete:
free(self);
return NULL;
}
int event__process_mmap(event_t *self, struct perf_session *session)
{
struct thread *thread;
struct map *map;
dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
self->mmap.pid, self->mmap.tid, self->mmap.start,
self->mmap.len, self->mmap.pgoff, self->mmap.filename);
if (self->mmap.pid == 0) {
static const char kmmap_prefix[] = "[kernel.kallsyms.";
if (self->mmap.filename[0] == '/') {
char short_module_name[1024];
char *name = strrchr(self->mmap.filename, '/'), *dot;
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, '-', '_');
map = perf_session__new_module_map(session,
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 (memcmp(self->mmap.filename, kmmap_prefix,
sizeof(kmmap_prefix) - 1) == 0) {
const char *symbol_name = (self->mmap.filename +
sizeof(kmmap_prefix) - 1);
/*
* Should be there already, from the build-id table in
* the header.
*/
struct dso *kernel = __dsos__findnew(&dsos__kernel,
"[kernel.kallsyms]");
if (kernel == NULL)
goto out_problem;
kernel->kernel = 1;
if (__perf_session__create_kernel_maps(session, kernel) < 0)
goto out_problem;
session->vmlinux_maps[MAP__FUNCTION]->start = self->mmap.start;
session->vmlinux_maps[MAP__FUNCTION]->end = self->mmap.start + self->mmap.len;
/*
* Be a bit paranoid here, some perf.data file came with
* a zero sized synthesized MMAP event for the kernel.
*/
if (session->vmlinux_maps[MAP__FUNCTION]->end == 0)
session->vmlinux_maps[MAP__FUNCTION]->end = ~0UL;
perf_session__set_kallsyms_ref_reloc_sym(session, symbol_name,
self->mmap.pgoff);
}
return 0;
}
thread = perf_session__findnew(session, self->mmap.pid);
map = map__new(&self->mmap, MAP__FUNCTION,
session->cwd, session->cwdlen);
if (thread == NULL || map == NULL)
goto out_problem;
thread__insert_map(thread, map);
return 0;
out_problem:
dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
return 0;
}
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;
}
