PreciseLeakSanitizer: Add destructor

RuntimeLibrary/plsan.cpp

@@ -7,11 +7,16 @@
 
 #include <cstddef>
 
+__plsan::Plsan *plsan;
+
 /* Initialization routines called before main() */
 __attribute__((constructor)) void __plsan_init() { /* TODO: */
-  __plsan::Plsan *plsan;
+  plsan = new __plsan::Plsan();
 }
 
+/* finialization routines called after main()*/
+__attribute__((destructor)) void __plsan_fini() { delete plsan; }
+
 void __plsan_alloc(void *addr, size_t size) {
   /* TODO: initialize references */
 }

RuntimeLibrary/plsan_shadow.cpp

@@ -11,6 +11,8 @@ PlsanShadow::PlsanShadow() {
     throw "mmap failed\n";
 }
 
+PlsanShadow::~PlsanShadow() { munmap(shadow_addr, MMAP_SIZE); }
+
 void PlsanShadow::alloc_shadow(void *addr, size_t size) {}
 
 void PlsanShadow::update_reference(void **lhs, void *rhs) {}

RuntimeLibrary/plsan_shadow.h

@@ -10,6 +10,7 @@ namespace __plsan {
 class PlsanShadow {
 public:
   PlsanShadow();
+  ~PlsanShadow();
   void alloc_shadow(void *addr, size_t size);
   void update_reference(void **lhs, void *rhs);