Remove two cleanups using std::string

This patches removes cleanups from a couple of spots by using
std::string rather than manual memory management.

Regression tested by the buildbot, though note that I don't believe
the buildbot actually exercises the machoread code.

gdb/ChangeLog
2018-03-13  Tom Tromey  <tom@tromey.com>

	* machoread.c (macho_check_dsym): Change filenamep to a
	std::string*.
	(macho_symfile_read): Update.
	* symfile.c (load_command): Use std::string.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e0f599a..bc3122d 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2018-03-13  Tom Tromey  <tom@tromey.com>
+
+       * machoread.c (macho_check_dsym): Change filenamep to a
+       std::string*.
+       (macho_symfile_read): Update.
+       * symfile.c (load_command): Use std::string.
+
 2018-03-12  Andrew Burgess  <andrew.burgess@embecosm.com>
 
        * riscv-tdep.c (riscv_sw_breakpoint_from_kind): Add localization

diff --git a/gdb/machoread.c b/gdb/machoread.c
index b270675..ab4410c 100644 (file)
--- a/gdb/machoread.c
+++ b/gdb/machoread.c
@@ -750,12 +750,12 @@ macho_symfile_read_all_oso (VEC (oso_el) **oso_vector_ptr,
 #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/"
 
 /* Check if a dsym file exists for OBJFILE.  If so, returns a bfd for it
-   and return *FILENAMEP with its original xmalloc-ated filename.
+   and return *FILENAMEP with its original filename.
    Return NULL if no valid dsym file is found (FILENAMEP is not used in
    such case).  */
 
 static gdb_bfd_ref_ptr
-macho_check_dsym (struct objfile *objfile, char **filenamep)
+macho_check_dsym (struct objfile *objfile, std::string *filenamep)
 {
   size_t name_len = strlen (objfile_name (objfile));
   size_t dsym_len = strlen (DSYM_SUFFIX);
@@ -804,7 +804,7 @@ macho_check_dsym (struct objfile *objfile, char **filenamep)
               objfile_name (objfile));
       return NULL;
     }
-  *filenamep = xstrdup (dsym_filename);
+  *filenamep = std::string (dsym_filename);
   return dsym_bfd;
 }
 
@@ -821,7 +821,7 @@ macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
      be in the executable.  */
   if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC))
     {
-      char *dsym_filename;
+      std::string dsym_filename;
 
       /* Process the normal symbol table first.  */
       storage_needed = bfd_get_symtab_upper_bound (objfile->obfd);
@@ -865,8 +865,6 @@ macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
        {
           struct bfd_section *asect, *dsect;
 
-         make_cleanup (xfree, dsym_filename);
-
          if (mach_o_debug_level > 0)
            printf_unfiltered (_("dsym file found\n"));
 
@@ -882,7 +880,7 @@ macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
             }
 
          /* Add the dsym file as a separate file.  */
-          symbol_file_add_separate (dsym_bfd.get (), dsym_filename,
+          symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (),
                                    symfile_flags, objfile);
 
          /* Don't try to read dwarf2 from main file or shared libraries.  */

diff --git a/gdb/symfile.c b/gdb/symfile.c
index 58747d5..f714845 100644 (file)
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -1789,8 +1789,6 @@ find_sym_fns (bfd *abfd)
 static void
 load_command (const char *arg, int from_tty)
 {
-  struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
-
   dont_repeat ();
 
   /* The user might be reloading because the binary has changed.  Take
@@ -1798,40 +1796,28 @@ load_command (const char *arg, int from_tty)
   reopen_exec_file ();
   reread_symbols ();
 
+  std::string temp;
   if (arg == NULL)
     {
-      const char *parg;
-      int count = 0;
+      const char *parg, *prev;
 
-      parg = arg = get_exec_file (1);
+      arg = get_exec_file (1);
 
-      /* Count how many \ " ' tab space there are in the name.  */
+      /* We may need to quote this string so buildargv can pull it
+        apart.  */
+      prev = parg = arg;
       while ((parg = strpbrk (parg, "\\\"'\t ")))
        {
-         parg++;
-         count++;
+         temp.append (prev, parg - prev);
+         prev = parg++;
+         temp.push_back ('\\');
        }
-
-      if (count)
+      /* If we have not copied anything yet, then we didn't see a
+        character to quote, and we can just leave ARG unchanged.  */
+      if (!temp.empty ())
        {
-         /* We need to quote this string so buildargv can pull it apart.  */
-         char *temp = (char *) xmalloc (strlen (arg) + count + 1 );
-         char *ptemp = temp;
-         const char *prev;
-
-         make_cleanup (xfree, temp);
-
-         prev = parg = arg;
-         while ((parg = strpbrk (parg, "\\\"'\t ")))
-           {
-             strncpy (ptemp, prev, parg - prev);
-             ptemp += parg - prev;
-             prev = parg++;
-             *ptemp++ = '\\';
-           }
-         strcpy (ptemp, prev);
-
-         arg = temp;
+         temp.append (prev);
+         arg = temp.c_str ();
        }
     }
 
@@ -1840,8 +1826,6 @@ load_command (const char *arg, int from_tty)
   /* After re-loading the executable, we don't really know which
      overlays are mapped any more.  */
   overlay_cache_invalid = 1;
-
-  do_cleanups (cleanup);
 }
 
 /* This version of "load" should be usable for any target.  Currently