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;
+}