-#include "mymemory.h"
-#include "snapshot.h"
-#include "snapshotimp.h"
+#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
#include <unistd.h>
-#include <cstring>
+#include <string.h>
+#include <new>
+
+#include "mymemory.h"
+#include "snapshot.h"
#include "common.h"
+#include "threads-model.h"
+#include "model.h"
+
#define REQUESTS_BEFORE_ALLOC 1024
-size_t allocatedReqs[ REQUESTS_BEFORE_ALLOC ] = { 0 };
+
+size_t allocatedReqs[REQUESTS_BEFORE_ALLOC] = { 0 };
int nextRequest = 0;
int howManyFreed = 0;
#if !USE_MPROTECT_SNAPSHOT
ptr = callocp(count, size);
return ptr;
#else
- if (!snapshotrecord) {
- createSharedMemory();
- }
- if (NULL == sStaticSpace)
- sStaticSpace = create_mspace_with_base(( void *)( snapshotrecord->mSharedMemoryBase), SHARED_MEMORY_DEFAULT -sizeof(struct SnapShot), 1);
+ if (!sStaticSpace)
+ sStaticSpace = create_shared_mspace();
return mspace_calloc(sStaticSpace, count, size);
#endif
}
ptr = mallocp(size);
return ptr;
#else
- if (!snapshotrecord) {
- createSharedMemory();
- }
- if (NULL == sStaticSpace)
- sStaticSpace = create_mspace_with_base(( void *)( snapshotrecord->mSharedMemoryBase), SHARED_MEMORY_DEFAULT -sizeof(struct SnapShot), 1);
+ if (!sStaticSpace)
+ sStaticSpace = create_shared_mspace();
return mspace_malloc(sStaticSpace, size);
#endif
}
/* get address of libc free */
if (!freep) {
- freep = ( void ( * )( void *))dlsym(RTLD_NEXT, "free");
+ freep = (void (*)(void *))dlsym(RTLD_NEXT, "free");
if ((error = dlerror()) != NULL) {
fputs(error, stderr);
exit(EXIT_FAILURE);
#endif
}
-/** Bootstrap allocation. Problem is that the dynamic linker calls
- * require calloc to work and calloc requires the dynamic linker to
- * work. */
+/** Bootstrap allocation. Problem is that the dynamic linker calls require
+ * calloc to work and calloc requires the dynamic linker to work. */
#define BOOTSTRAPBYTES 4096
char bootstrapmemory[BOOTSTRAPBYTES];
exit(EXIT_FAILURE);
}
- void *pointer= (void *)&bootstrapmemory[offset];
+ void *pointer = (void *)&bootstrapmemory[offset];
offset += sz;
return pointer;
}
return (ptr >= (&bootstrapmemory[0]) && ptr < (&bootstrapmemory[BOOTSTRAPBYTES]));
}
-/** @brief Snapshotting malloc implementation for user programs */
+/**
+ * @brief The allocator function for "user" allocation
+ *
+ * Should only be used for allocations which will not disturb the allocation
+ * patterns of a user thread.
+ */
+static void * user_malloc(size_t size)
+{
+ void *tmp = mspace_malloc(user_snapshot_space, size);
+ ASSERT(tmp);
+ return tmp;
+}
+
+/**
+ * @brief Snapshotting malloc implementation for user programs
+ *
+ * Do NOT call this function from a model-checker context. Doing so may disrupt
+ * the allocation patterns of a user thread.
+ */
void *malloc(size_t size)
{
if (user_snapshot_space) {
- void *tmp = mspace_malloc(user_snapshot_space, size);
- ASSERT(tmp);
- return tmp;
+ /* Only perform user allocations from user context */
+ ASSERT(!model || thread_current());
+ return user_malloc(size);
} else
return HandleEarlyAllocationRequest(size);
}
return tmp;
} else {
void *tmp = HandleEarlyAllocationRequest(size * num);
- std::memset(tmp, 0, size * num);
+ memset(tmp, 0, size * num);
return tmp;
}
}
+/** @brief Snapshotting allocation function for use by the Thread class only */
+void * Thread_malloc(size_t size)
+{
+ return user_malloc(size);
+}
+
+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+ free(ptr);
+}
+
/** @brief Snapshotting new operator for user programs */
void * operator new(size_t size) throw(std::bad_alloc)
{
{
free(p);
}
-#endif /* 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);
+}
+
+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+ free(ptr);
+}
+
+#endif /* !USE_MPROTECT_SNAPSHOT */