public inbox for gcc-prs@sourceware.org help / color / mirror / Atom feed
From: Neil Booth <neil@daikokuya.demon.co.uk> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org Subject: Re: preprocessor/4178: ICE with -imacros Date: Thu, 30 Aug 2001 23:06:00 -0000 [thread overview] Message-ID: <20010831060628.5390.qmail@sourceware.cygnus.com> (raw) The following reply was made to PR preprocessor/4178; it has been noted by GNATS. From: Neil Booth <neil@daikokuya.demon.co.uk> To: Gert-jan Los <gjlos@rz.uni-mannheim.de> Cc: gcc-gnats@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: Re: preprocessor/4178: ICE with -imacros Date: Thu, 30 Aug 2001 22:45:01 +0100 Gert-jan Los wrote:- > GCC dies with an ICE even on trivial input if the -imacros switch is > used. > I suspect an oversight in the recent line mapping changes, because of > the negative line number in the error message. Thanks for the bug report. No, it's just silly lossage in handling the internal linked lists of directives. This patch is not great; its only redeeming feature is that I think it fixes the bug. Sometime in the next few days, when I'm a little less inebriated and have some spare time, I'll fix it properly 8-) I'm running a bootstrap now. Let me know if this cures whatever code you have that caused you to notice the bug originally, and I'll commit it. I must find a way of getting -imacros and -include tests into dejagnu. They need to take absolute paths, which means I have no clue how to add tests for them... Neil. * cppinit.c (cpp_start_read): Free the imacros list as we traverse it. Don't free the chains before returning. (_cpp_push_next_buffer): Only try pushing buffers if we've completed -imacros handling. Index: cppinit.c =================================================================== RCS file: /cvs/gcc/gcc/gcc/cppinit.c,v retrieving revision 1.176 diff -u -p -r1.176 cppinit.c --- cppinit.c 2001/08/22 20:37:18 1.176 +++ cppinit.c 2001/08/30 21:43:14 @@ -958,18 +958,19 @@ cpp_start_read (pfile, fname) /* Scan -imacros files after command line defines, but before files given with -include. */ - for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next) + while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL) { if (push_include (pfile, p)) { pfile->buffer->return_at_eof = true; cpp_scan_nooutput (pfile); } + CPP_OPTION (pfile, pending)->imacros_head = p->next; + free (p); } } free_chain (CPP_OPTION (pfile, pending)->directive_head); - free_chain (CPP_OPTION (pfile, pending)->imacros_head); _cpp_push_next_buffer (pfile); return 1; @@ -984,7 +985,12 @@ _cpp_push_next_buffer (pfile) { bool pushed = false; - if (CPP_OPTION (pfile, pending)) + /* This is't pretty; we'd rather not be relying on this as a boolean + for reverting the line map. Further, we only free the chains in + this conditional, so an early call to cpp_finish / cpp_destroy + will leak that memory. */ + if (CPP_OPTION (pfile, pending) + && CPP_OPTION (pfile, pending)->imacros_head == NULL) { while (!pushed) {
next reply other threads:[~2001-08-30 23:06 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2001-08-30 23:06 Neil Booth [this message] -- strict thread matches above, loose matches on Subject: below -- 2001-08-30 5:16 Gert-jan Los
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20010831060628.5390.qmail@sourceware.cygnus.com \ --to=neil@daikokuya.demon.co.uk \ --cc=gcc-prs@gcc.gnu.org \ --cc=nobody@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).