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Use unique_xmalloc_ptr for read_string

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This changes read_string's "buffer" out-parameter to be a
unique_xmalloc_ptr, then updates the users.  This allows for the
removal of some cleanups.

I chose unique_xmalloc_ptr rather than byte_vector here due to the way
Guile unwinding seems to work.

Tested by the buildbot.

gdb/ChangeLog
2018-06-18  Tom Tromey  <tom@tromey.com>

	* valprint.h (read_string): Update.
	* valprint.c (read_string): Change type of "buffer".
	(val_print_string): Update.
	* python/py-value.c (valpy_string): Update.
	* language.h (struct language_defn) <la_get_string>: Change
	type of "buffer".
	(default_get_string, c_get_string): Update.
	* language.c (default_get_string): Change type of "buffer".
	* guile/scm-value.c (gdbscm_value_to_string): Update.
	* c-lang.c (c_get_string): Change type of "buffer".
This commit is contained in:
Tom Tromey 2018-05-21 12:35:59 -06:00
parent 3f0dbd670b
commit b4be9fadea
8 changed files with 64 additions and 55 deletions
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7
gdb/guile/scm-value.c
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@ -1106,7 +1106,7 @@ gdbscm_value_to_string (SCM self, SCM rest)
char *encoding = NULL;
SCM errors = SCM_BOOL_F;
int length = -1;
gdb_byte *buffer = NULL;
gdb::unique_xmalloc_ptr<gdb_byte> buffer;
const char *la_encoding = NULL;
struct type *char_type = NULL;
SCM result;
@ -1163,9 +1163,10 @@ gdbscm_value_to_string (SCM self, SCM rest)
scm_dynwind_begin ((scm_t_dynwind_flags) 0);
gdbscm_dynwind_xfree (encoding);
gdbscm_dynwind_xfree (buffer);
gdb_byte *buffer_contents = buffer.release ();
gdbscm_dynwind_xfree (buffer_contents);
result = scm_from_stringn ((const char *) buffer,
result = scm_from_stringn ((const char *) buffer_contents,
length * TYPE_LENGTH (char_type),
(encoding != NULL && *encoding != '\0'
? encoding