X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=mymemory.cc;h=3d5168f95571abb4f36afc848a4be1073c7abda8;hb=HEAD;hp=2b9c44d516282e1041487c6d0d1a5f1a78a1f472;hpb=7bec9f8bcc8c63a0be2b31f8aa01a61a50afe4f9;p=c11tester.git

diff --git a/mymemory.cc b/mymemory.cc
index 2b9c44d5..3d5168f9 100644
--- a/mymemory.cc
+++ b/mymemory.cc
@@ -1,139 +1,200 @@
-#include "mymemory.h"
-#include "snapshot.h"
-#include "snapshotimp.h"
+
+#include <stdlib.h>
 #include <stdio.h>
 #include <dlfcn.h>
-#if !USE_MPROTECT_SNAPSHOT
-static mspace sStaticSpace = NULL;
-#endif
+#include <unistd.h>
+#include <string.h>
+#include <new>
 
-/** Non-snapshotting malloc for our use. */
+#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);
+}
 
-void *MYMALLOC(size_t size) {
-#if USE_MPROTECT_SNAPSHOT
-	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(EXIT_FAILURE);
-		}
-	}
-	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 *system_malloc( size_t size ){
-	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(EXIT_FAILURE);
-		}
-	}
-	ptr = mallocp(size);
-	return ptr;
+/** Non-snapshotting malloc for our use. */
+void *model_malloc(size_t size)
+{
+	return mspace_malloc(sStaticSpace, size);
 }
 
-void system_free( void * ptr ){
-	static void (*freep)(void *);
-	char *error;
+/** Non-snapshotting malloc for our use. */
+void *model_realloc(void *ptr, size_t size)
+{
+	return mspace_realloc(sStaticSpace, ptr, size);
+}
 
-	/* 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);
+/** @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;
 }
 
-/** Non-snapshotting free for our use. */
-void MYFREE(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
+/** @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;
+}
 
-/** This global references the mspace for the snapshotting heap */
-mspace mySpace = NULL;
+/** @brief Snapshotting free, for use by model-checker (not user progs) */
+void snapshot_free(void *ptr)
+{
+	mspace_free(model_snapshot_space, ptr);
+}
 
-/** This global references the unaligned memory address that was malloced for the snapshotting heap */
-void * basemySpace = NULL;
+/** Non-snapshotting free for our use. */
+void model_free(void *ptr)
+{
+	mspace_free(sStaticSpace, ptr);
+}
 
-//Subramanian --- please make these work for the fork based approach
+/** Bootstrap allocation. Problem is that the dynamic linker calls require
+ *  calloc to work and calloc requires the dynamic linker to work. */
 
-/** Snapshotting malloc implementation for user programs. */
+#define BOOTSTRAPBYTES 131072
+char bootstrapmemory[BOOTSTRAPBYTES];
+size_t offset = 0;
 
-void *malloc( size_t size ) {
-	return mspace_malloc( mySpace, size );
-}
+void * HandleEarlyAllocationRequest(size_t sz)
+{
+	/* Align to 8 byte boundary */
+	sz = (sz + 7) & ~7;
 
-/** Snapshotting free implementation for user programs. */
+	if (sz > (BOOTSTRAPBYTES-offset)) {
+		model_print("OUT OF BOOTSTRAP MEMORY.  Increase the size of BOOTSTRAPBYTES in mymemory.cc\n");
+		exit(EXIT_FAILURE);
+	}
 
-void free( void * ptr ){
-	mspace_free( mySpace, ptr );
+	void *pointer = (void *)&bootstrapmemory[offset];
+	offset += sz;
+	return pointer;
 }
 
-/** Snapshotting realloc implementation for user programs. */
+/** @brief Global mspace reference for the model-checker's snapshotting heap */
+mspace model_snapshot_space = NULL;
 
-void *realloc( void *ptr, size_t size ){
-	return mspace_realloc( mySpace, ptr, size );
+/** @brief Snapshotting allocation function for use by the Thread class only */
+void * Thread_malloc(size_t size)
+{
+	return snapshot_malloc(size);
 }
 
-/** Snapshotting new operator for user programs. */
-
-void * operator new(size_t size) throw(std::bad_alloc) {
-	return malloc(size);
+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+	snapshot_free(ptr);
 }
 
-/** Snapshotting delete operator for user programs. */
+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 operator delete(void *p) throw() {
-	free(p);
+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");
+	}
 }
 
-/** Snapshotting new[] operator for user programs. */
+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 * operator new[](size_t size) throw(std::bad_alloc) {
-	return malloc(size);
+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);
 }
 
-/** Snapshotting delete[] operator for user programs. */
+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 operator delete[](void *p, size_t size) {
-	free(p);
+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);
 }