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Check return value of bfd_init

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Alan recently added a way for BFD library users to check whether they
were in fact loading a compatible version of BFD:

https://sourceware.org/ml/binutils/2018-10/msg00198.html

It seemed reasonable to me that gdb should do this check as well, in
case someone is dynamically linking against BFD.

Simon pointed out that an earlier version of the patch would cause a
gdb crash if the test failed.  This version works around this by
lowering the call to bfd_init and adding a comment explaining where
'error' can safely be called in captured_main_1.

gdb/ChangeLog
2018-10-30  Tom Tromey  <tom@tromey.com>

	* main.c (captured_main_1): Check return value of bfd_init.
This commit is contained in:
Tom Tromey 2018-10-25 09:00:52 -06:00
parent fd332753fa
commit 4d5d104997
2 changed files with 9 additions and 1 deletions
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4
gdb/ChangeLog
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@ -1,3 +1,7 @@
2018-10-30 Tom Tromey <tom@tromey.com>
* main.c (captured_main_1): Check return value of bfd_init.
2018-10-29 Sergio Durigan Junior <sergiodj@redhat.com>
* common/offset-type.h (DEFINE_OFFSET_REL_OP): Delete.

6
gdb/main.c
View File

@ -506,7 +506,6 @@ captured_main_1 (struct captured_main_args *context)
textdomain (PACKAGE);
#endif
bfd_init ();
notice_open_fds ();
saved_command_line = (char *) xstrdup ("");
@ -517,12 +516,17 @@ captured_main_1 (struct captured_main_args *context)
setvbuf (stderr, NULL, _IONBF, BUFSIZ);
#endif
/* Note: `error' cannot be called before this point, because the
caller will crash when trying to print the exception. */
main_ui = new ui (stdin, stdout, stderr);
current_ui = main_ui;
gdb_stdtargerr = gdb_stderr; /* for moment */
gdb_stdtargin = gdb_stdin; /* for moment */
if (bfd_init () != BFD_INIT_MAGIC)
error (_("fatal error: libbfd ABI mismatch"));
#ifdef __MINGW32__
/* On Windows, argv[0] is not necessarily set to absolute form when
GDB is found along PATH, without which relocation doesn't work. */