#include "thread.h"
static pid_t event__synthesize_comm(pid_t pid, int full,
- int (*process)(event_t *event,
- struct perf_session *session),
+ event__handler_t process,
struct perf_session *session)
{
event_t ev;
}
static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
- int (*process)(event_t *event,
- struct perf_session *session),
+ event__handler_t process,
struct perf_session *session)
{
char filename[PATH_MAX];
while (1) {
char bf[BUFSIZ], *pbf = bf;
event_t ev = {
- .header = { .type = PERF_RECORD_MMAP },
+ .header = {
+ .type = PERF_RECORD_MMAP,
+ .misc = 0, /* Just like the kernel, see kernel/perf_event.c __perf_event_mmap */
+ },
};
int n;
size_t size;
return 0;
}
-int event__synthesize_thread(pid_t pid,
- int (*process)(event_t *event,
- struct perf_session *session),
+int event__synthesize_modules(event__handler_t process,
+ struct perf_session *session)
+{
+ struct rb_node *nd;
+
+ for (nd = rb_first(&session->kmaps.maps[MAP__FUNCTION]);
+ nd; nd = rb_next(nd)) {
+ event_t ev;
+ size_t size;
+ struct map *pos = rb_entry(nd, struct map, rb_node);
+
+ if (pos->dso->kernel)
+ continue;
+
+ size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+ memset(&ev, 0, sizeof(ev));
+ ev.mmap.header.misc = 1; /* kernel uses 0 for user space maps, see kernel/perf_event.c __perf_event_mmap */
+ ev.mmap.header.type = PERF_RECORD_MMAP;
+ ev.mmap.header.size = (sizeof(ev.mmap) -
+ (sizeof(ev.mmap.filename) - size));
+ ev.mmap.start = pos->start;
+ ev.mmap.len = pos->end - pos->start;
+
+ memcpy(ev.mmap.filename, pos->dso->long_name,
+ pos->dso->long_name_len + 1);
+ process(&ev, session);
+ }
+
+ return 0;
+}
+
+int event__synthesize_thread(pid_t pid, event__handler_t process,
struct perf_session *session)
{
pid_t tgid = event__synthesize_comm(pid, 1, process, session);
return event__synthesize_mmap_events(pid, tgid, process, session);
}
-void event__synthesize_threads(int (*process)(event_t *event,
- struct perf_session *session),
+void event__synthesize_threads(event__handler_t process,
struct perf_session *session)
{
DIR *proc;
closedir(proc);
}
+struct process_symbol_args {
+ const char *name;
+ u64 start;
+};
+
+static int find_symbol_cb(void *arg, const char *name, char type, u64 start)
+{
+ struct process_symbol_args *args = arg;
+
+ /*
+ * Must be a function or at least an alias, as in PARISC64, where "_text" is
+ * an 'A' to the same address as "_stext".
+ */
+ if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
+ type == 'A') || strcmp(name, args->name))
+ return 0;
+
+ args->start = start;
+ return 1;
+}
+
+int event__synthesize_kernel_mmap(event__handler_t process,
+ struct perf_session *session,
+ const char *symbol_name)
+{
+ size_t size;
+ event_t ev = {
+ .header = {
+ .type = PERF_RECORD_MMAP,
+ .misc = 1, /* kernel uses 0 for user space maps, see kernel/perf_event.c __perf_event_mmap */
+ },
+ };
+ /*
+ * We should get this from /sys/kernel/sections/.text, but till that is
+ * available use this, and after it is use this as a fallback for older
+ * kernels.
+ */
+ struct process_symbol_args args = { .name = symbol_name, };
+
+ if (kallsyms__parse("/proc/kallsyms", &args, find_symbol_cb) <= 0)
+ return -ENOENT;
+
+ size = snprintf(ev.mmap.filename, sizeof(ev.mmap.filename),
+ "[kernel.kallsyms.%s]", symbol_name) + 1;
+ size = ALIGN(size, sizeof(u64));
+ ev.mmap.header.size = (sizeof(ev.mmap) - (sizeof(ev.mmap.filename) - size));
+ ev.mmap.pgoff = args.start;
+ ev.mmap.start = session->vmlinux_maps[MAP__FUNCTION]->start;
+ ev.mmap.len = session->vmlinux_maps[MAP__FUNCTION]->end - ev.mmap.start ;
+
+ return process(&ev, session);
+}
+
static void thread__comm_adjust(struct thread *self)
{
char *comm = self->comm;
int event__process_mmap(event_t *self, struct perf_session *session)
{
- struct thread *thread = perf_session__findnew(session, self->mmap.pid);
- struct map *map = map__new(&self->mmap, MAP__FUNCTION,
- session->cwd, session->cwdlen);
+ 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;
+ }
- dump_printf(" %d/%d: [%p(%p) @ %p]: %s\n",
- self->mmap.pid, self->mmap.tid,
- (void *)(long)self->mmap.start,
- (void *)(long)self->mmap.len,
- (void *)(long)self->mmap.pgoff,
- self->mmap.filename);
+ thread = perf_session__findnew(session, self->mmap.pid);
+ map = map__new(&self->mmap, MAP__FUNCTION,
+ session->cwd, session->cwdlen);
if (thread == NULL || map == NULL)
- dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
- else
- thread__insert_map(thread, map);
+ goto out_problem;
+ thread__insert_map(thread, map);
+ return 0;
+
+out_problem:
+ dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
return 0;
}
return 0;
}
-void thread__find_addr_location(struct thread *self,
- struct perf_session *session, u8 cpumode,
- enum map_type type, u64 addr,
- struct addr_location *al,
- symbol_filter_t filter)
+void thread__find_addr_map(struct thread *self,
+ struct perf_session *session, u8 cpumode,
+ enum map_type type, u64 addr,
+ struct addr_location *al)
{
struct map_groups *mg = &self->mg;
else {
al->level = 'H';
al->map = NULL;
- al->sym = NULL;
return;
}
try_again:
mg = &session->kmaps;
goto try_again;
}
- al->sym = NULL;
- } else {
+ } else
al->addr = al->map->map_ip(al->map, al->addr);
- al->sym = map__find_symbol(al->map, session, al->addr, filter);
- }
+}
+
+void thread__find_addr_location(struct thread *self,
+ struct perf_session *session, u8 cpumode,
+ enum map_type type, u64 addr,
+ struct addr_location *al,
+ symbol_filter_t filter)
+{
+ thread__find_addr_map(self, session, cpumode, type, addr, al);
+ if (al->map != NULL)
+ al->sym = map__find_symbol(al->map, al->addr, filter);
+ else
+ al->sym = NULL;
}
static void dso__calc_col_width(struct dso *self)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff