rename libmallocwrap -> libustinstr-malloc

[ust.git] / libustinstr-malloc / mallocwrap.c

diff --git a/libustinstr-malloc/mallocwrap.c b/libustinstr-malloc/mallocwrap.c
new file mode 100644 (file)
index 0000000..f5d5ce3
--- /dev/null
+++ b/libustinstr-malloc/mallocwrap.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 2009  Pierre-Marc Fournier
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#define _GNU_SOURCE
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <stdio.h>
+
+#include <ust/marker.h>
+
+#if 0
+INTERCEPT_PROTOTYPE(void, malloc, size_t size)
+INTERCEPT_TRACE("size %d", size)
+INTERCEPT_CALL_ARGS(size)
+INTERCEPT()
+
+#define INTERCEPT_FUNC(type, name, args...)                                            \
+__I_FUNC_TYPE(type)                                                                    \
+__I_FUNC_NAME(name)                                                                    \
+__I_FUNC_ARGS(args)
+
+#define INTERCEPT_TRACE(fmt, args...)                                                  \
+#define __I_TRACE_FMT fmt                                                              \
+#define __I_TRACE_ARGS args
+
+#define INTERCEPT_CALL_ARGS(args...)                                                   \
+#define __I_CALL_ARGS args
+
+#define INTERCEPT()                                                                    \
+__I_FUNC_TYPE __I_FUNC_NAME(__I_FUNC_ARGS)                                             \
+{                                                                                      \
+       static __I_FUNC_TYPE (*plibc_ ## __I_FUNC_NAME)(args) = NULL;                   \
+                                                                                       \
+       if(plibc_ ## __I_FUNC_NAME == NULL) {                                           \
+               plibc_ ## __I_FUNC_NAME = dlsym(RTLD_NEXT, "malloc");                   \
+               if(plibc_ ## __I_FUNC_NAME == NULL) {                                   \
+                       fprintf(stderr, "mallocwrap: unable to find malloc\n");         \
+                       return NULL;                                                    \
+               }                                                                       \
+       }                                                                               \
+                                                                                       \
+       trace_mark(ust, __I_FUNC_NAME, __I_TRACE_FMT, __I_TRACE_ARGS);                  \
+                                                                                       \
+       return plibc_ ## __I_FUNC_NAME (__I_CALL_ARGS);                                 \
+}
+#endif
+
+void *malloc(size_t size)
+{
+       static void *(*plibc_malloc)(size_t size) = NULL;
+
+       void *retval;
+
+       if(plibc_malloc == NULL) {
+               plibc_malloc = dlsym(RTLD_NEXT, "malloc");
+               if(plibc_malloc == NULL) {
+                       fprintf(stderr, "mallocwrap: unable to find malloc\n");
+                       return NULL;
+               }
+       }
+
+       retval = plibc_malloc(size);
+
+       trace_mark(ust, malloc, "size %d ptr %p", (int)size, retval);
+
+       return retval;
+}
+
+void free(void *ptr)
+{
+       static void *(*plibc_free)(void *ptr) = NULL;
+
+       if(plibc_free == NULL) {
+               plibc_free = dlsym(RTLD_NEXT, "free");
+               if(plibc_free == NULL) {
+                       fprintf(stderr, "mallocwrap: unable to find free\n");
+                       return;
+               }
+       }
+
+       trace_mark(ust, free, "ptr %p", ptr);
+
+       plibc_free(ptr);
+}
+
+MARKER_LIB