Tests: detect memory leaks in automated tests

A memory leak should be considered a bug. Therefore, it makes sense to fail tests when they contain memory leaks.

Differential Revision: https://developer.blender.org/D8665

intern/guardedalloc/MEM_guardedalloc.h

@@ -215,6 +215,11 @@ extern const char *(*MEM_name_ptr)(void *vmemh);
  * about memory leaks will be printed on exit. */
 void MEM_init_memleak_detection(void);
 
+/** When this has been called and memory leaks have been detected, the process will have an exit
+ * code that indicates failure. This can be used for when checking for memory leaks with automated
+ * tests. */
+void MEM_enable_fail_on_memleak(void);
+
 /* Switch allocator to slower but fully guarded mode. */
 void MEM_use_guarded_allocator(void);
 

intern/guardedalloc/intern/leak_detector.cc

@@ -18,6 +18,8 @@
  * \ingroup MEM
  */
 
+#include <cstdlib>
+
 #include "MEM_guardedalloc.h"
 #include "mallocn_intern.h"
 
@@ -28,6 +30,9 @@ char free_after_leak_detection_message[] =
     "error, use the 'construct on first use' idiom.";
 
 namespace {
+
+static bool fail_on_memleak = false;
+
 class MemLeakPrinter {
  public:
   ~MemLeakPrinter()
@@ -42,6 +47,15 @@ class MemLeakPrinter {
            leaked_blocks,
            (double)mem_in_use / 1024 / 1024);
     MEM_printmemlist();
+
+    if (fail_on_memleak) {
+      /* There are many other ways to change the exit code to failure here:
+       * - Make the destructor noexcept(false) and throw an exception.
+       * - Call exit(EXIT_FAILURE).
+       * - Call terminate().
+       */
+      abort();
+    }
   }
 };
 }  // namespace
@@ -59,3 +73,8 @@ void MEM_init_memleak_detection(void)
    */
   static MemLeakPrinter printer;
 }
+
+void MEM_enable_fail_on_memleak(void)
+{
+  fail_on_memleak = true;
+}

source/creator/creator_args.c

@@ -751,6 +751,18 @@ static int arg_handle_abort_handler_disable(int UNUSED(argc),
   return 0;
 }
 
+static const char arg_handle_fail_on_memleak_doc[] =
+    "\n\t"
+    "Exit with an exit code that indicates failure when memory leaks are detected.\n"
+    "This can be used to make automated tests fail.";
+static int arg_handle_fail_on_memleak(int UNUSED(argc),
+                                      const char **UNUSED(argv),
+                                      void *UNUSED(data))
+{
+  MEM_enable_fail_on_memleak();
+  return 0;
+}
+
 static const char arg_handle_background_mode_set_doc[] =
     "\n\t"
     "Run in background (often used for UI-less rendering).";
@@ -2267,6 +2279,8 @@ void main_args_setup(bContext *C, bArgs *ba)
   BLI_argsAdd(ba, 1, "-t", "--threads", CB(arg_handle_threads_set), NULL);
   BLI_argsAdd(ba, 4, "-x", "--use-extension", CB(arg_handle_extension_set), C);
 
+  BLI_argsAdd(ba, 1, NULL, "--fail-on-memleak", CB(arg_handle_fail_on_memleak), NULL);
+
 #  undef CB
 #  undef CB_EX
 }

tests/CMakeLists.txt

@@ -44,7 +44,7 @@ unset(_default_test_python_exe)
 
 # Standard Blender arguments for running tests.
 # Specify exit code so that if a Python script error happens, the test fails.
-set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --python-exit-code 1)
+set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --debug-memory --fail-on-memleak --python-exit-code 1)
 
 # Python CTests
 if(WITH_BLENDER AND WITH_PYTHON)

tests/gtests/testing/testing_main.cc

@@ -50,6 +50,7 @@ int main(int argc, char **argv)
 {
   MEM_use_guarded_allocator();
   MEM_init_memleak_detection();
+  MEM_enable_fail_on_memleak();
   testing::InitGoogleTest(&argc, argv);
   BLENDER_GFLAGS_NAMESPACE::ParseCommandLineFlags(&argc, &argv, true);
   google::InitGoogleLogging(argv[0]);

tests/python/collada/CMakeLists.txt

@@ -36,12 +36,12 @@ execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${TEST_OUT_DIR})
 # all calls to blender use this
 if(APPLE)
   if(${CMAKE_GENERATOR} MATCHES "Xcode")
-    set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup)
+    set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --debug-memory --fail-on-memleak)
   else()
-    set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
+    set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --debug-memory --fail-on-memleak --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
   endif()
 else()
-  set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
+  set(TEST_BLENDER_EXE_PARAMS --background -noaudio --factory-startup --debug-memory --fail-on-memleak --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
 endif()
 
 # for testing with valgrind prefix: valgrind --track-origins=yes --error-limit=no

tests/python/cycles_render_tests.py

@@ -20,6 +20,8 @@ def get_arguments(filepath, output_filepath):
         "-noaudio",
         "--factory-startup",
         "--enable-autoexec",
+        "--debug-memory",
+        "--fail-on-memleak",
         filepath,
         "-E", "CYCLES",
         "-o", output_filepath,

tests/python/eevee_render_tests.py

@@ -103,6 +103,8 @@ def get_arguments(filepath, output_filepath):
         "-noaudio",
         "--factory-startup",
         "--enable-autoexec",
+        "--debug-memory",
+        "--fail-on-memleak",
         filepath,
         "-E", "BLENDER_EEVEE",
         "-P",

tests/python/modules/test_utils.py

@@ -79,6 +79,8 @@ class AbstractBlenderRunnerTest(unittest.TestCase):
             '-noaudio',
             '--factory-startup',
             '--enable-autoexec',
+            '--debug-memory',
+            '--fail-on-memleak',
         ]
 
         if blendfile:

tests/python/opengl_draw_tests.py

@@ -39,6 +39,8 @@ def get_arguments(filepath, output_filepath):
         "-noaudio",
         "--factory-startup",
         "--enable-autoexec",
+        "--debug-memory",
+        "--fail-on-memleak",
         filepath,
         "-P",
         os.path.realpath(__file__),

tests/python/view_layer/CMakeLists.txt

@@ -30,7 +30,7 @@ execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${TEST_OUT_DIR})
 # endif()
 
 # for testing with valgrind prefix: valgrind --track-origins=yes --error-limit=no
-set(TEST_BLENDER_EXE $<TARGET_FILE:blender> --background -noaudio --factory-startup --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
+set(TEST_BLENDER_EXE $<TARGET_FILE:blender> --background -noaudio --factory-startup --debug-memory --fail-on-memleak --env-system-scripts ${CMAKE_SOURCE_DIR}/release/scripts)
 
 
 # ------------------------------------------------------------------------------

tests/python/workbench_render_tests.py

@@ -39,6 +39,8 @@ def get_arguments(filepath, output_filepath):
         "-noaudio",
         "--factory-startup",
         "--enable-autoexec",
+        "--debug-memory",
+        "--fail-on-memleak",
         filepath,
         "-E", "BLENDER_WORKBENCH",
         "-P",