Use xmalloc() instead of malloc() in the places where malloc() calls

are assumed to not fail.

Make the xcalloc() calling conventions follow the calloc(3) calling
conventions and replace unchecked calls to calloc() with calls to
xcalloc().

Remove redundand declarations from xmalloc.c, which are already
present in rtld.h.

Reviewed by:	kan
Discussed with:	bde
MFC after:	2 weeks

5 files changed, 20 insertions, 19 deletions

diff --git a/libexec/rtld-elf/ia64/reloc.c b/libexec/rtld-elf/ia64/reloc.c
index 1afcecf..01e20b8 100644
--- a/libexec/rtld-elf/ia64/reloc.c
+++ b/libexec/rtld-elf/ia64/reloc.c
@@ -87,7 +87,7 @@ alloc_fptr(Elf_Addr target, Elf_Addr gp)
 	struct fptr* fptr;
 
 	if (next_fptr == last_fptr) {
-		current_chunk = malloc(sizeof(struct fptr_chunk));
+		current_chunk = xmalloc(sizeof(struct fptr_chunk));
 		next_fptr = &current_chunk->fptrs[0];
 		last_fptr = &current_chunk->fptrs[FPTR_CHUNK_SIZE];
 	}
@@ -116,9 +116,7 @@ alloc_fptrs(Obj_Entry *obj, bool mapped)
 		if (fptrs == MAP_FAILED)
 			fptrs = NULL;
 	} else {
-		fptrs = malloc(fbytes);
-		if (fptrs != NULL)
- 			memset(fptrs, 0, fbytes);
+		fptrs = xcalloc(1, fbytes);
 	}
 
 	/*
diff --git a/libexec/rtld-elf/powerpc64/reloc.c b/libexec/rtld-elf/powerpc64/reloc.c
index 46e2c62..92df83d 100644
--- a/libexec/rtld-elf/powerpc64/reloc.c
+++ b/libexec/rtld-elf/powerpc64/reloc.c
@@ -338,7 +338,7 @@ reloc_plt_object(Obj_Entry *obj, const Elf_Rela *rela)
 	reloff = rela - obj->pltrela;
 
 	if (obj->priv == NULL)
-		obj->priv = malloc(obj->pltrelasize);
+		obj->priv = xmalloc(obj->pltrelasize);
 	glink = obj->priv + reloff*sizeof(Elf_Addr)*2;
 
 	dbg(" reloc_plt_object: where=%p,reloff=%lx,glink=%p", (void *)where, reloff, glink);
diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
index f2ad554..4dac1c1 100644
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -3733,7 +3733,7 @@ tls_get_addr_slow(Elf_Addr **dtvp, int index, size_t offset)
     /* Check dtv generation in case new modules have arrived */
     if (dtv[0] != tls_dtv_generation) {
 	wlock_acquire(rtld_bind_lock, &lockstate);
-	newdtv = calloc(1, (tls_max_index + 2) * sizeof(Elf_Addr));
+	newdtv = xcalloc(tls_max_index + 2, sizeof(Elf_Addr));
 	to_copy = dtv[1];
 	if (to_copy > tls_max_index)
 	    to_copy = tls_max_index;
@@ -3788,7 +3788,7 @@ allocate_tls(Obj_Entry *objs, void *oldtcb, size_t tcbsize, size_t tcbalign)
 	return (oldtcb);
 
     assert(tcbsize >= TLS_TCB_SIZE);
-    tcb = calloc(1, tls_static_space - TLS_TCB_SIZE + tcbsize);
+    tcb = xcalloc(1, tls_static_space - TLS_TCB_SIZE + tcbsize);
     tls = (Elf_Addr **)(tcb + tcbsize - TLS_TCB_SIZE);
 
     if (oldtcb != NULL) {
@@ -3804,7 +3804,7 @@ allocate_tls(Obj_Entry *objs, void *oldtcb, size_t tcbsize, size_t tcbalign)
 	    }
 	}
     } else {
-	dtv = calloc(tls_max_index + 2, sizeof(Elf_Addr));
+	dtv = xcalloc(tls_max_index + 2, sizeof(Elf_Addr));
 	tls[0] = dtv;
 	dtv[0] = tls_dtv_generation;
 	dtv[1] = tls_max_index;
@@ -3868,8 +3868,8 @@ allocate_tls(Obj_Entry *objs, void *oldtls, size_t tcbsize, size_t tcbalign)
     size = round(tls_static_space, tcbalign);
 
     assert(tcbsize >= 2*sizeof(Elf_Addr));
-    tls = calloc(1, size + tcbsize);
-    dtv = calloc(1, (tls_max_index + 2) * sizeof(Elf_Addr));
+    tls = xcalloc(1, size + tcbsize);
+    dtv = xcalloc(tls_max_index + 2, sizeof(Elf_Addr));
 
     segbase = (Elf_Addr)(tls + size);
     ((Elf_Addr*)segbase)[0] = segbase;
@@ -4209,7 +4209,7 @@ rtld_verify_object_versions(Obj_Entry *obj)
      * way.
      */
     obj->vernum = maxvernum + 1;
-    obj->vertab = calloc(obj->vernum, sizeof(Ver_Entry));
+    obj->vertab = xcalloc(obj->vernum, sizeof(Ver_Entry));
 
     vd = obj->verdef;
     while (vd != NULL) {
diff --git a/libexec/rtld-elf/rtld.h b/libexec/rtld-elf/rtld.h
index 2aabffe..2bf9518 100644
--- a/libexec/rtld-elf/rtld.h
+++ b/libexec/rtld-elf/rtld.h
@@ -58,7 +58,7 @@
 #endif
 
 #define NEW(type)	((type *) xmalloc(sizeof(type)))
-#define CNEW(type)	((type *) xcalloc(sizeof(type)))
+#define CNEW(type)	((type *) xcalloc(1, sizeof(type)))
 
 /* We might as well do booleans like C++. */
 typedef unsigned char bool;
@@ -319,7 +319,7 @@ typedef struct Struct_SymLook {
 extern void _rtld_error(const char *, ...) __printflike(1, 2);
 extern const char *rtld_strerror(int);
 extern Obj_Entry *map_object(int, const char *, const struct stat *);
-extern void *xcalloc(size_t);
+extern void *xcalloc(size_t, size_t);
 extern void *xmalloc(size_t);
 extern char *xstrdup(const char *);
 extern Elf_Addr _GLOBAL_OFFSET_TABLE_[];
diff --git a/libexec/rtld-elf/xmalloc.c b/libexec/rtld-elf/xmalloc.c
index 0d99225..3783685 100644
--- a/libexec/rtld-elf/xmalloc.c
+++ b/libexec/rtld-elf/xmalloc.c
@@ -32,14 +32,17 @@
 #include "rtld.h"
 #include "rtld_printf.h"
 
-void *xcalloc(size_t);
-void *xmalloc(size_t);
-char *xstrdup(const char *);
-
 void *
-xcalloc(size_t size)
+xcalloc(size_t number, size_t size)
 {
-    return memset(xmalloc(size), 0, size);
+	void *p;
+
+	p = calloc(number, size);
+	if (p == NULL) {
+		rtld_fdputstr(STDERR_FILENO, "Out of memory\n");
+		_exit(1);
+	}
+	return (p);
 }
 
 void *