Remove unused functions and optimize data race checking for mem* operations

[c11tester.git] / mymemory.cc

diff --git a/mymemory.cc b/mymemory.cc
index dd22909c9bb31a32405070cb2e6873ac5d584e95..3d5168f95571abb4f36afc848a4be1073c7abda8 100644 (file)
--- a/mymemory.cc
+++ b/mymemory.cc
@@ -110,3 +110,91 @@ 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);
+}