-#include "mymemory.h"
-#include "snapshot.h"
-#include "snapshotimp.h"
+#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
-#define MSPACE_SIZE ( 1 << 20 )
-#if !USE_CHECKPOINTING
+#include <unistd.h>
+#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 };
+int nextRequest = 0;
+int howManyFreed = 0;
+#if !USE_MPROTECT_SNAPSHOT
static mspace sStaticSpace = NULL;
#endif
-void *MYMALLOC(size_t size)
-{
-#if USE_CHECKPOINTING
- static void *(*mallocp)(size_t size);
- char *error;
- void *ptr;
-
- /* get address of libc malloc */
- if (!mallocp) {
- mallocp = ( void * ( * )( size_t ) )dlsym(RTLD_NEXT, "malloc");
- if ((error = dlerror()) != NULL) {
- fputs(error, stderr);
- exit(1);
- }
- }
- ptr = mallocp(size);
- return ptr;
+
+/** Non-snapshotting calloc for our use. */
+void *model_calloc(size_t count, size_t size)
+{
+#if USE_MPROTECT_SNAPSHOT
+ static void *(*callocp)(size_t count, size_t size) = NULL;
+ char *error;
+ void *ptr;
+
+ /* get address of libc malloc */
+ if (!callocp) {
+ callocp = (void * (*)(size_t, size_t))dlsym(RTLD_NEXT, "calloc");
+ if ((error = dlerror()) != NULL) {
+ fputs(error, stderr);
+ exit(EXIT_FAILURE);
+ }
+ }
+ ptr = callocp(count, size);
+ return ptr;
#else
- if( !sTheRecord ){
- createSharedLibrary();
- }
- if( NULL == sStaticSpace )
- sStaticSpace = create_mspace_with_base( ( void * )( sTheRecord->mSharedMemoryBase ), SHARED_MEMORY_DEFAULT -sizeof( struct Snapshot_t ), 1 );
- return mspace_malloc( sStaticSpace, size );
+ if (!sStaticSpace)
+ sStaticSpace = create_shared_mspace();
+ return mspace_calloc(sStaticSpace, count, size);
#endif
}
-void MYFREE(void *ptr)
+/** Non-snapshotting malloc for our use. */
+void *model_malloc(size_t size)
{
-#if USE_CHECKPOINTING
- static void (*freep)(void *);
- char *error;
+#if USE_MPROTECT_SNAPSHOT
+ static void *(*mallocp)(size_t size) = NULL;
+ char *error;
+ void *ptr;
- /* get address of libc free */
- if (!freep) {
- freep = ( void ( * )( void * ) )dlsym(RTLD_NEXT, "free");
- if ((error = dlerror()) != NULL) {
- fputs(error, stderr);
- exit(1);
- }
- }
- freep(ptr);
+ /* get address of libc malloc */
+ if (!mallocp) {
+ mallocp = (void * (*)(size_t))dlsym(RTLD_NEXT, "malloc");
+ if ((error = dlerror()) != NULL) {
+ fputs(error, stderr);
+ exit(EXIT_FAILURE);
+ }
+ }
+ ptr = mallocp(size);
+ return ptr;
#else
- mspace_free( sStaticSpace, ptr );
+ if (!sStaticSpace)
+ sStaticSpace = create_shared_mspace();
+ return mspace_malloc(sStaticSpace, size);
#endif
}
-static mspace mySpace = NULL;
-void *malloc( size_t size ){
- if( NULL == mySpace ){
- //void * mem = MYMALLOC( MSPACE_SIZE );
- mySpace = create_mspace( MSPACE_SIZE, 1 );
+
+/** 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)
+{
+ void *tmp = mspace_malloc(model_snapshot_space, size);
+ ASSERT(tmp);
+ return tmp;
+}
+
+/** @brief Snapshotting calloc, for use by model-checker (not user progs) */
+void * snapshot_calloc(size_t count, size_t size)
+{
+ void *tmp = mspace_calloc(model_snapshot_space, count, size);
+ ASSERT(tmp);
+ return tmp;
+}
+
+/** @brief Snapshotting realloc, for use by model-checker (not user progs) */
+void *snapshot_realloc(void *ptr, size_t size)
+{
+ void *tmp = mspace_realloc(model_snapshot_space, ptr, size);
+ ASSERT(tmp);
+ return tmp;
+}
+
+/** @brief Snapshotting free, for use by model-checker (not user progs) */
+void snapshot_free(void *ptr)
+{
+ mspace_free(model_snapshot_space, ptr);
+}
+
+/** Non-snapshotting free for our use. */
+void model_free(void *ptr)
+{
+#if USE_MPROTECT_SNAPSHOT
+ static void (*freep)(void *);
+ char *error;
+
+ /* get address of libc free */
+ if (!freep) {
+ freep = (void (*)(void *))dlsym(RTLD_NEXT, "free");
+ if ((error = dlerror()) != NULL) {
+ fputs(error, stderr);
+ exit(EXIT_FAILURE);
+ }
+ }
+ freep(ptr);
+#else
+ mspace_free(sStaticSpace, ptr);
+#endif
+}
+
+/** Bootstrap allocation. Problem is that the dynamic linker calls require
+ * calloc to work and calloc requires the dynamic linker to work. */
+
+#define BOOTSTRAPBYTES 131072
+char bootstrapmemory[BOOTSTRAPBYTES];
+size_t offset = 0;
+
+void * HandleEarlyAllocationRequest(size_t sz)
+{
+ /* Align to 8 byte boundary */
+ sz = (sz + 7) & ~7;
+
+ if (sz > (BOOTSTRAPBYTES-offset)) {
+ model_print("OUT OF BOOTSTRAP MEMORY. Increase the size of BOOTSTRAPBYTES in mymemory.cc\n");
+ exit(EXIT_FAILURE);
+ }
+
+ void *pointer = (void *)&bootstrapmemory[offset];
+ offset += sz;
+ return pointer;
+}
+
+/** @brief Global mspace reference for the model-checker's snapshotting heap */
+mspace model_snapshot_space = NULL;
+
+#if USE_MPROTECT_SNAPSHOT
+
+/** @brief Global mspace reference for the user's snapshotting heap */
+mspace user_snapshot_space = NULL;
+
+/** Check whether this is bootstrapped memory that we should not free */
+static bool DontFree(void *ptr)
+{
+ return (ptr >= (&bootstrapmemory[0]) && ptr < (&bootstrapmemory[BOOTSTRAPBYTES]));
+}
+
+/**
+ * @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) {
+ /* Only perform user allocations from user context */
+ ASSERT(!model || thread_current());
+ return user_malloc(size);
+ } else
+ return HandleEarlyAllocationRequest(size);
+}
+
+/** @brief Snapshotting free implementation for user programs */
+void free(void * ptr)
+{
+ if (!DontFree(ptr)) {
+ mspace_free(user_snapshot_space, ptr);
}
- return mspace_malloc( mySpace, size );
}
-void free( void * ptr ){
- mspace_free( mySpace, ptr );
+/** @brief Snapshotting realloc implementation for user programs */
+void *realloc(void *ptr, size_t size)
+{
+ void *tmp = mspace_realloc(user_snapshot_space, ptr, size);
+ ASSERT(tmp);
+ return tmp;
+}
+
+/** @brief Snapshotting calloc implementation for user programs */
+void * calloc(size_t num, size_t size)
+{
+ if (user_snapshot_space) {
+ void *tmp = mspace_calloc(user_snapshot_space, num, size);
+ ASSERT(tmp);
+ return tmp;
+ } else {
+ void *tmp = HandleEarlyAllocationRequest(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)
+{
+ return malloc(size);
+}
+
+/** @brief Snapshotting delete operator for user programs */
+void operator delete(void *p) throw()
+{
+ free(p);
+}
+
+/** @brief Snapshotting new[] operator for user programs */
+void * operator new[](size_t size) throw(std::bad_alloc)
+{
+ return malloc(size);
+}
+
+/** @brief Snapshotting delete[] operator for user programs */
+void operator delete[](void *p, size_t size)
+{
+ free(p);
+}
+
+#else /* !USE_MPROTECT_SNAPSHOT */
+
+/** @brief Snapshotting allocation function for use by the Thread class only */
+void * Thread_malloc(size_t size)
+{
+ return snapshot_malloc(size);
+}
+
+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+ snapshot_free(ptr);
}
+#endif /* !USE_MPROTECT_SNAPSHOT */
projects / c11tester.git / blobdiff