Design a method to select predicate branches based on exploration counts

[c11tester.git] / mymemory.cc

diff --git a/mymemory.cc b/mymemory.cc
index 9e05c369235dadb077b6d09b1cfb7b2ece92180f..1f8b616020e481e795fd36f74bfa1d2ab56722cc 100644 (file)
--- a/mymemory.cc
+++ b/mymemory.cc
@@ -1,3 +1,4 @@
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <dlfcn.h>
@@ -70,6 +71,31 @@ void *model_malloc(size_t size)
 #endif
 }
 
+/** Non-snapshotting malloc for our use. */
+void *model_realloc(void *ptr, size_t size)
+{
+#if USE_MPROTECT_SNAPSHOT
+       static void *(*reallocp)(void *ptr, size_t size) = NULL;
+       char *error;
+       void *newptr;
+
+       /* get address of libc malloc */
+       if (!reallocp) {
+               reallocp = (void * (*)(size_t))dlsym(RTLD_NEXT, "realloc");
+               if ((error = dlerror()) != NULL) {
+                       fputs(error, stderr);
+                       exit(EXIT_FAILURE);
+               }
+       }
+       newptr = reallocp(ptr, size);
+       return newptr;
+#else
+       if (!sStaticSpace)
+               sStaticSpace = create_shared_mspace();
+       return mspace_realloc(sStaticSpace, ptr, size);
+#endif
+}
+
 /** @brief Snapshotting malloc, for use by model-checker (not user progs) */
 void * snapshot_malloc(size_t size)
 {
@@ -124,7 +150,7 @@ void model_free(void *ptr)
 /** Bootstrap allocation. Problem is that the dynamic linker calls require
  *  calloc to work and calloc requires the dynamic linker to work. */
 
-#define BOOTSTRAPBYTES 4096
+#define BOOTSTRAPBYTES 131072
 char bootstrapmemory[BOOTSTRAPBYTES];
 size_t offset = 0;
 
@@ -134,7 +160,7 @@ void * HandleEarlyAllocationRequest(size_t sz)
        sz = (sz + 7) & ~7;
 
        if (sz > (BOOTSTRAPBYTES-offset)) {
-               model_print("OUT OF BOOTSTRAP MEMORY\n");
+               model_print("OUT OF BOOTSTRAP MEMORY.  Increase the size of BOOTSTRAPBYTES in mymemory.cc\n");
                exit(EXIT_FAILURE);
        }
 
@@ -189,8 +215,9 @@ void *malloc(size_t size)
 /** @brief Snapshotting free implementation for user programs */
 void free(void * ptr)
 {
-       if (!DontFree(ptr))
+       if (!DontFree(ptr)) {
                mspace_free(user_snapshot_space, ptr);
+       }
 }
 
 /** @brief Snapshotting realloc implementation for user programs */
@@ -251,18 +278,18 @@ void operator delete[](void *p, size_t size)
        free(p);
 }
 
-#else /* !USE_MPROTECT_SNAPSHOT */
+#else  /* !USE_MPROTECT_SNAPSHOT */
 
 /** @brief Snapshotting allocation function for use by the Thread class only */
 void * Thread_malloc(size_t size)
 {
-       return malloc(size);
+       return snapshot_malloc(size);
 }
 
 /** @brief Snapshotting free function for use by the Thread class only */
 void Thread_free(void *ptr)
 {
-       free(ptr);
+       snapshot_free(ptr);
 }
 
-#endif /* !USE_MPROTECT_SNAPSHOT */
+#endif /* !USE_MPROTECT_SNAPSHOT */