-#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
-static mspace sStaticSpace = NULL;
-#endif
-void *MYMALLOC(size_t size)
+#include <unistd.h>
+#include <string.h>
+#include <new>
+
+#include "mymemory.h"
+#include "snapshot.h"
+#include "common.h"
+#include "threads-model.h"
+#include "model.h"
+#include "datarace.h"
+
+#define REQUESTS_BEFORE_ALLOC 1024
+
+size_t allocatedReqs[REQUESTS_BEFORE_ALLOC] = { 0 };
+int nextRequest = 0;
+int howManyFreed = 0;
+mspace sStaticSpace = NULL;
+
+/** Non-snapshotting calloc for our use. */
+void *model_calloc(size_t count, size_t size)
+{
+ return mspace_calloc(sStaticSpace, count, size);
+}
+
+/** Non-snapshotting malloc for our use. */
+void *model_malloc(size_t size)
+{
+ return mspace_malloc(sStaticSpace, size);
+}
+
+/** Non-snapshotting malloc for our use. */
+void *model_realloc(void *ptr, size_t size)
+{
+ return mspace_realloc(sStaticSpace, ptr, size);
+}
+
+/** @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_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;
-#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 );
-#endif
-}
-
-void MYFREE(void *ptr)
+ mspace_free(sStaticSpace, ptr);
+}
+
+/** 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)
{
-#if USE_CHECKPOINTING
- 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(1);
- }
- }
- freep(ptr);
-#else
- mspace_free( sStaticSpace, ptr );
-#endif
-}
-static mspace mySpace = NULL;
-void *malloc( size_t size ){
- if( NULL == mySpace ){
- //void * mem = MYMALLOC( MSPACE_SIZE );
- mySpace = create_mspace( MSPACE_SIZE, 1 );
- AddUserHeapToSnapshot();
+ /* 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);
}
- return mspace_malloc( mySpace, size );
+
+ void *pointer = (void *)&bootstrapmemory[offset];
+ offset += sz;
+ return pointer;
}
-void free( void * ptr ){
- mspace_free( mySpace, ptr );
+/** @brief Global mspace reference for the model-checker's snapshotting heap */
+mspace model_snapshot_space = NULL;
+
+/** @brief Snapshotting allocation function for use by the Thread class only */
+void * Thread_malloc(size_t size)
+{
+ return snapshot_malloc(size);
}
-void AddUserHeapToSnapshot(){
- static bool alreadySnapshotted = false;
- if( alreadySnapshotted ) return;
- addMemoryRegionToSnapShot( mySpace, MSPACE_SIZE / PAGESIZE );
+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+ snapshot_free(ptr);
+}
+
+void * (*volatile real_memcpy)(void * dst, const void *src, size_t n) = NULL;
+void * (*volatile real_memmove)(void * dst, const void *src, size_t len) = NULL;
+void (*volatile real_bzero)(void * dst, size_t len) = NULL;
+void * (*volatile real_memset)(void * dst, int c, size_t len) = NULL;
+
+void init_memory_ops()
+{
+ if (!real_memcpy) {
+ real_memcpy = (void * (*)(void * dst, const void *src, size_t n)) 1;
+ real_memcpy = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memcpy");
+ }
+ if (!real_memmove) {
+ real_memmove = (void * (*)(void * dst, const void *src, size_t n)) 1;
+ real_memmove = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memmove");
+ }
+ if (!real_memset) {
+ real_memset = (void * (*)(void * dst, int c, size_t n)) 1;
+ real_memset = (void * (*)(void * dst, int c, size_t n))dlsym(RTLD_NEXT, "memset");
+ }
+ if (!real_bzero) {
+ real_bzero = (void (*)(void * dst, size_t len)) 1;
+ real_bzero = (void (*)(void * dst, size_t len))dlsym(RTLD_NEXT, "bzero");
+ }
+}
+
+void * memcpy(void * dst, const void * src, size_t n) {
+ if (model && !inside_model) {
+ //model_print("memcpy size: %d\n", n);
+ thread_id_t tid = thread_current_id();
+ raceCheckReadMemop(tid, (void *)src, n);
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memcpy) < 2) {
+ for(uint i=0;i<n;i++) {
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ return dst;
+ }
+ return real_memcpy(dst, src, n);
+}
+
+void * memmove(void * dst, const void * src, size_t n) {
+ if (model && !inside_model) {
+ thread_id_t tid = thread_current_id();
+ raceCheckReadMemop(tid, (void *)src, n);
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memmove) < 2) {
+ if (((uintptr_t)dst) < ((uintptr_t)src))
+ for(uint i=0;i<n;i++) {
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ else
+ for(uint i=n;i!=0; ) {
+ i--;
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ return dst;
+ }
+ return real_memmove(dst, src, n);
+}
+
+void * memset(void *dst, int c, size_t n) {
+ if (model && !inside_model) {
+ //model_print("memset size: %d\n", n);
+ thread_id_t tid = thread_current_id();
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memset) < 2) {
+ //stuck in dynamic linker alloc cycle...
+ for(size_t s=0;s<n;s++) {
+ ((volatile char *)dst)[s] = (char) c;
+ }
+ return dst;
+ }
+ return real_memset(dst, c, n);
+}
+
+void bzero(void *dst, size_t n) {
+ if (model && !inside_model) {
+ thread_id_t tid = thread_current_id();
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_bzero) < 2) {
+ for(size_t s=0;s<n;s++) {
+ ((volatile char *)dst)[s] = 0;
+ }
+ return;
+ }
+ real_bzero(dst, n);
}
projects / c11tester.git / blobdiff