commit 051792fed4ce3fcbfb8f2c8e86bd50e959fe14ca
author Christopher Ferris <cferris@google.com> Mon Jun 19 13:42:04 2017 -0700
committer Christopher Ferris <cferris@google.com> Mon Jun 19 16:20:33 2017 -0700
tree 7a0b4848ae3b5e87c453784352dd5d9a0f70eccd
parent ad4aa9e169529615ba7c74b942aaee53a1425a78

Fix some memory leaks, potential errors.

Fix a couple of memory leaks in tests.

Fix a potential case that length could be zero.

Bug: 23762183

Test: Ran unit tests, then ran valgrind on unit tests and verified no leaks.
Change-Id: I5f7602aa0204db0488a8e305250658cdb6e977d0

libunwindstack/Maps.cpp

diff --git a/libunwindstack/Maps.cpp b/libunwindstack/Maps.cpp
index b369c43..b869918 100644
--- a/libunwindstack/Maps.cpp
+++ b/libunwindstack/Maps.cpp
@@ -71,15 +71,17 @@
     map_info->flags |= PROT_EXEC;
   }
 
-  map_info->name = &line[name_pos];
-  size_t length = map_info->name.length() - 1;
-  if (map_info->name[length] == '\n') {
-    map_info->name.erase(length);
-  }
-  // Mark a device map in /dev/and not in /dev/ashmem/ specially.
-  if (!map_info->name.empty() && map_info->name.substr(0, 5) == "/dev/" &&
-      map_info->name.substr(5, 7) != "ashmem/") {
-    map_info->flags |= MAPS_FLAGS_DEVICE_MAP;
+  if (line[name_pos] != '\0') {
+    map_info->name = &line[name_pos];
+    size_t length = map_info->name.length() - 1;
+    if (map_info->name[length] == '\n') {
+      map_info->name.erase(length);
+    }
+
+    // Mark a device map in /dev/and not in /dev/ashmem/ specially.
+    if (map_info->name.substr(0, 5) == "/dev/" && map_info->name.substr(5, 7) != "ashmem/") {
+      map_info->flags |= MAPS_FLAGS_DEVICE_MAP;
+    }
   }
 
   return true;