1 files changed, 77 insertions, 7 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 707ce1cb1621..ce3a6c8abe76 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -4,6 +4,7 @@
 #include <sys/types.h>
 
 #include "session.h"
+#include "sort.h"
 #include "util.h"
 
 static int perf_session__open(struct perf_session *self, bool force)
@@ -50,31 +51,100 @@ out_close:
 
 struct perf_session *perf_session__new(const char *filename, int mode, bool force)
 {
-        size_t len = strlen(filename) + 1;
+        size_t len = filename ? strlen(filename) + 1 : 0;
         struct perf_session *self = zalloc(sizeof(*self) + len);
 
         if (self == NULL)
                 goto out;
 
         if (perf_header__init(&self->header) < 0)
-                goto out_delete;
+                goto out_free;
 
         memcpy(self->filename, filename, len);
+        self->threads = RB_ROOT;
+        self->last_match = NULL;
+        self->mmap_window = 32;
+        self->cwd = NULL;
+        self->cwdlen = 0;
+        map_groups__init(&self->kmaps);
+
+        if (perf_session__create_kernel_maps(self) < 0)
+                goto out_delete;
 
-        if (mode == O_RDONLY && perf_session__open(self, force) < 0) {
-                perf_session__delete(self);
-                self = NULL;
-        }
+        if (mode == O_RDONLY && perf_session__open(self, force) < 0)
+                goto out_delete;
 out:
         return self;
-out_delete:
+out_free:
         free(self);
         return NULL;
+out_delete:
+        perf_session__delete(self);
+        return NULL;
 }
 
 void perf_session__delete(struct perf_session *self)
 {
         perf_header__exit(&self->header);
         close(self->fd);
+        free(self->cwd);
         free(self);
 }
+
+static bool symbol__match_parent_regex(struct symbol *sym)
+{
+        if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
+                return 1;
+
+        return 0;
+}
+
+struct symbol **perf_session__resolve_callchain(struct perf_session *self,
+                                                struct thread *thread,
+                                                struct ip_callchain *chain,
+                                                struct symbol **parent)
+{
+        u8 cpumode = PERF_RECORD_MISC_USER;
+        struct symbol **syms = NULL;
+        unsigned int i;
+
+        if (symbol_conf.use_callchain) {
+                syms = calloc(chain->nr, sizeof(*syms));
+                if (!syms) {
+                        fprintf(stderr, "Can't allocate memory for symbols\n");
+                        exit(-1);
+                }
+        }
+
+        for (i = 0; i < chain->nr; i++) {
+                u64 ip = chain->ips[i];
+                struct addr_location al;
+
+                if (ip >= PERF_CONTEXT_MAX) {
+                        switch (ip) {
+                        case PERF_CONTEXT_HV:
+                                cpumode = PERF_RECORD_MISC_HYPERVISOR;  break;
+                        case PERF_CONTEXT_KERNEL:
+                                cpumode = PERF_RECORD_MISC_KERNEL;      break;
+                        case PERF_CONTEXT_USER:
+                                cpumode = PERF_RECORD_MISC_USER;        break;
+                        default:
+                                break;
+                        }
+                        continue;
+                }
+
+                thread__find_addr_location(thread, self, cpumode,
+                                           MAP__FUNCTION, ip, &al, NULL);
+                if (al.sym != NULL) {
+                        if (sort__has_parent && !*parent &&
+                            symbol__match_parent_regex(al.sym))
+                                *parent = al.sym;
+                        if (!symbol_conf.use_callchain)
+                                break;
+                        syms[i] = al.sym;
+                }
+        }
+
+        return syms;
+}