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-rw-r--r--xmalloc.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/xmalloc.c b/xmalloc.c
new file mode 100644
index 0000000..1b3b408
--- /dev/null
+++ b/xmalloc.c
@@ -0,0 +1,225 @@
+/* xmalloc.c -- safe versions of malloc and realloc */
+
+/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the GNU Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if defined (HAVE_CONFIG_H)
+#include <config.h>
+#endif
+
+#include "bashtypes.h"
+#include <stdio.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#if defined (HAVE_STDLIB_H)
+# include <stdlib.h>
+#else
+# include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#include "error.h"
+
+#include "bashintl.h"
+
+#if !defined (PTR_T)
+# if defined (__STDC__)
+# define PTR_T void *
+# else
+# define PTR_T char *
+# endif /* !__STDC__ */
+#endif /* !PTR_T */
+
+#if HAVE_SBRK && !HAVE_DECL_SBRK
+extern char *sbrk();
+#endif
+
+#if HAVE_SBRK && defined (USING_BASH_MALLOC)
+static PTR_T lbreak;
+static int brkfound;
+static size_t allocated;
+#endif
+
+/* **************************************************************** */
+/* */
+/* Memory Allocation and Deallocation. */
+/* */
+/* **************************************************************** */
+
+#if HAVE_SBRK && defined (USING_BASH_MALLOC)
+#define FINDBRK() \
+do { \
+ if (brkfound == 0) \
+ { \
+ lbreak = (PTR_T)sbrk (0); \
+ brkfound++; \
+ } \
+} while (0)
+
+static size_t
+findbrk ()
+{
+ FINDBRK();
+ return (char *)sbrk (0) - (char *)lbreak;
+}
+#else
+#define FINDBRK()
+#endif
+
+static void
+allocerr (func, bytes)
+ const char *func;
+ size_t bytes;
+{
+#if HAVE_SBRK && defined (USING_BASH_MALLOC)
+ allocated = findbrk ();
+ fatal_error (_("%s: cannot allocate %lu bytes (%lu bytes allocated)"), func, (unsigned long)bytes, (unsigned long)allocated);
+#else
+ fatal_error (_("%s: cannot allocate %lu bytes"), func, (unsigned long)bytes);
+#endif /* !HAVE_SBRK */
+}
+
+/* Return a pointer to free()able block of memory large enough
+ to hold BYTES number of bytes. If the memory cannot be allocated,
+ print an error message and abort. */
+PTR_T
+xmalloc (bytes)
+ size_t bytes;
+{
+ PTR_T temp;
+
+#if defined (DEBUG)
+ if (bytes == 0)
+ internal_warning("xmalloc: size argument is 0");
+#endif
+
+ FINDBRK();
+ temp = malloc (bytes);
+
+ if (temp == 0)
+ allocerr ("xmalloc", bytes);
+
+ return (temp);
+}
+
+PTR_T
+xrealloc (pointer, bytes)
+ PTR_T pointer;
+ size_t bytes;
+{
+ PTR_T temp;
+
+#if defined (DEBUG)
+ if (bytes == 0)
+ internal_warning("xrealloc: size argument is 0");
+#endif
+
+ FINDBRK();
+ temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
+
+ if (temp == 0)
+ allocerr ("xrealloc", bytes);
+
+ return (temp);
+}
+
+/* Use this as the function to call when adding unwind protects so we
+ don't need to know what free() returns. */
+void
+xfree (string)
+ PTR_T string;
+{
+ if (string)
+ free (string);
+}
+
+#ifdef USING_BASH_MALLOC
+#include <malloc/shmalloc.h>
+
+static void
+sh_allocerr (func, bytes, file, line)
+ const char *func;
+ size_t bytes;
+ char *file;
+ int line;
+{
+#if HAVE_SBRK
+ allocated = findbrk ();
+ fatal_error (_("%s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), func, file, line, (unsigned long)bytes, (unsigned long)allocated);
+#else
+ fatal_error (_("%s: %s:%d: cannot allocate %lu bytes"), func, file, line, (unsigned long)bytes);
+#endif /* !HAVE_SBRK */
+}
+
+PTR_T
+sh_xmalloc (bytes, file, line)
+ size_t bytes;
+ char *file;
+ int line;
+{
+ PTR_T temp;
+
+#if defined (DEBUG)
+ if (bytes == 0)
+ internal_warning("xmalloc: %s:%d: size argument is 0", file, line);
+#endif
+
+ FINDBRK();
+ temp = sh_malloc (bytes, file, line);
+
+ if (temp == 0)
+ sh_allocerr ("xmalloc", bytes, file, line);
+
+ return (temp);
+}
+
+PTR_T
+sh_xrealloc (pointer, bytes, file, line)
+ PTR_T pointer;
+ size_t bytes;
+ char *file;
+ int line;
+{
+ PTR_T temp;
+
+#if defined (DEBUG)
+ if (bytes == 0)
+ internal_warning("xrealloc: %s:%d: size argument is 0", file, line);
+#endif
+
+ FINDBRK();
+ temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line);
+
+ if (temp == 0)
+ sh_allocerr ("xrealloc", bytes, file, line);
+
+ return (temp);
+}
+
+void
+sh_xfree (string, file, line)
+ PTR_T string;
+ char *file;
+ int line;
+{
+ if (string)
+ sh_free (string, file, line);
+}
+#endif