public inbox for gcc-prs@sourceware.org help / color / mirror / Atom feed
From: grigory@stl.sarov.ru To: gcc-gnats@gcc.gnu.org Subject: libstdc++/7442: cxxabi.h does not match the C++ ABI Date: Tue, 30 Jul 2002 01:26:00 -0000 [thread overview] Message-ID: <20020730081820.16478.qmail@sources.redhat.com> (raw) >Number: 7442 >Category: libstdc++ >Synopsis: cxxabi.h does not match the C++ ABI >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Tue Jul 30 01:26:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Grigory Zagorodnev >Release: 3.1.1 >Organization: >Environment: host: i686-pc-linux-gnu build: i686-pc-linux-gnu target: i686-pc-linux-gnu configured with: ./configure --enable-threads >Description: There is a couple of discrepancies between G++ implementation of 'cxxabi.h' file and the C++ ABI. I. Member name difference ------------------------- The C++ ABI defines that... 2.9.5 RTTI Layout 9 The abi::__pointer_to_member_type_info type adds one field to abi::__pbase_type_info: class __pointer_to_member_type_info : public __pbase_type_info { public: const abi::__class_type_info *__context; }; G++ implementation is the following: --- cxxabi.h ------------------------------------------------------------ class __pointer_to_member_type_info : public __pbase_type_info { /* abi defined member variables */ public: __class_type_info *__context_class; /* class of the member */ ------------------------------------------------------------------------- II. Class name difference ------------------------- Class '__base_class_type_info' specifyed by the C++ ABI, declared with the name '__base_class_info' in the G++'s cxxabi.h file. Moreover, name of the member __base_type is different too. 2.9.5 RTTI Layout 6. Three different types are used to represent user type information: __base_info[] is an array of base class descriptions -- one for every direct proper base. Each description is of the type: struct abi::__base_class_type_info { public: const __class_type_info *__base_type; long __offset_flags; enum __offset_flags_masks { __virtual_mask = 0x1, __public_mask = 0x2, __offset_shift = 8 }; }; --- G++'s cxxabi.h ------------------------------------------------------ class __base_class_info { /* abi defined member variables */ public: const __class_type_info *__base; /* base class type */ long __offset_flags; /* offset and info */ ------------------------------------------------------------------------- >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-07-30 8:26 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-07-30 1:26 grigory [this message] 2002-07-31 12:39 bkoz 2002-07-31 14:19 bkoz 2002-08-01 14:13 bkoz
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=20020730081820.16478.qmail@sources.redhat.com \ --to=grigory@stl.sarov.ru \ --cc=gcc-gnats@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).