[RFA v2 10/17] Replace two xmallocs with unique_ptr

[Tom Tromey <tom@tromey.com>]

This replaces a couple of uses of xmalloc with gdb::unique_ptr, also
removing a couple of cleanups.

2016-09-26  Tom Tromey  <tom@tromey.com>

	* cli/cli-dump.c (dump_memory_to_file): Use gdb::unique_ptr.
	(restore_binary_file): Likewise.
---
 gdb/ChangeLog      |  5 +++++
 gdb/cli/cli-dump.c | 19 ++++++++-----------
 2 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f476299..0d5f425 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2016-09-26  Tom Tromey  <tom@tromey.com>
 
+	* cli/cli-dump.c (dump_memory_to_file): Use gdb::unique_ptr.
+	(restore_binary_file): Likewise.
+
+2016-09-26  Tom Tromey  <tom@tromey.com>
+
 	* maint.h (scoped_command_stats): New class.
 	(make_command_stats_cleanup): Don't declare.
 	* maint.c (struct cmd_stats): Remove.
diff --git a/gdb/cli/cli-dump.c b/gdb/cli/cli-dump.c
index 611b0c3..eb7f69d 100644
--- a/gdb/cli/cli-dump.c
+++ b/gdb/cli/cli-dump.c
@@ -212,7 +212,6 @@ dump_memory_to_file (const char *cmd, const char *mode, const char *file_format)
   CORE_ADDR hi;
   ULONGEST count;
   const char *filename;
-  gdb_byte *buf;
   const char *lo_exp;
   const char *hi_exp;
 
@@ -237,18 +236,17 @@ dump_memory_to_file (const char *cmd, const char *mode, const char *file_format)
 
   /* FIXME: Should use read_memory_partial() and a magic blocking
      value.  */
-  buf = (gdb_byte *) xmalloc (count);
-  make_cleanup (xfree, buf);
-  read_memory (lo, buf, count);
+  gdb::unique_ptr<gdb_byte[]> buf (new gdb_byte[count]);
+  read_memory (lo, buf.get (), count);
   
   /* Have everything.  Open/write the data.  */
   if (file_format == NULL || strcmp (file_format, "binary") == 0)
     {
-      dump_binary_file (filename, mode, buf, count);
+      dump_binary_file (filename, mode, buf.get (), count);
     }
   else
     {
-      dump_bfd_file (filename, mode, file_format, lo, buf, count);
+      dump_bfd_file (filename, mode, file_format, lo, buf.get (), count);
     }
 
   do_cleanups (old_cleanups);
@@ -518,7 +516,6 @@ restore_binary_file (const char *filename, struct callback_data *data)
 {
   struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
   FILE *file = fopen_with_cleanup (filename, FOPEN_RB);
-  gdb_byte *buf;
   long len;
 
   /* Get the file size for reading.  */
@@ -553,13 +550,13 @@ restore_binary_file (const char *filename, struct callback_data *data)
     perror_with_name (filename);
 
   /* Now allocate a buffer and read the file contents.  */
-  buf = (gdb_byte *) xmalloc (len);
-  make_cleanup (xfree, buf);
-  if (fread (buf, 1, len, file) != len)
+  gdb::unique_ptr<gdb_byte[]> buf (new gdb_byte[len]);
+  if (fread (buf.get (), 1, len, file) != len)
     perror_with_name (filename);
 
   /* Now write the buffer into target memory.  */
-  len = target_write_memory (data->load_start + data->load_offset, buf, len);
+  len = target_write_memory (data->load_start + data->load_offset,
+			     buf.get (), len);
   if (len != 0)
     warning (_("restore: memory write failed (%s)."), safe_strerror (len));
   do_cleanups (cleanup);
-- 
2.7.4