From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 8DC273858C27; Mon, 13 Mar 2023 20:19:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8DC273858C27 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1678738778; bh=wiaansAlVfaZFJb3znWT2E+exGDiosD0cAsLvVMCmdM=; h=From:To:Subject:Date:In-Reply-To:References:From; b=AZcxGUCwys5h7eFECur2jsiM33cBpCJEmN7KoaSW0PfEBfpNxWV43HdGYh+ydrU/V xLAS24VxEg60geEkqZ+Q3GMUUldAFci4566Ocr9RLUO+EofrG+EpeifiitD/wM9gFe kW/ZfRxmgUt+PcdLu5/WKB8Fm5Jf6fWwn12dnePo= From: "cvs-commit at gcc dot gnu.org" To: gdb-prs@sourceware.org Subject: [Bug testsuite/30158] rustc testsuite fails with 13.1, apparently worked before with trunk 20230114 on i686-linux-gnu and powerpc64le-linux-gnu Date: Mon, 13 Mar 2023 20:19:38 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: testsuite X-Bugzilla-Version: 13.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: cvs-commit at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: tromey at sourceware dot org X-Bugzilla-Target-Milestone: 13.2 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://sourceware.org/bugzilla/show_bug.cgi?id=3D30158 --- Comment #17 from cvs-commit at gcc dot gnu.org --- The gdb-13-branch branch has been updated by Tom Tromey : https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D562403d4f548= 3e0787219fdb88da72c707c8d7f6 commit 562403d4f5483e0787219fdb88da72c707c8d7f6 Author: Tom Tromey Date: Fri Feb 24 10:40:16 2023 -0700 Fix crash in inside_main_func gdb 13.1 crashes while running the rust compiler's debugger tests. The crash has a number of causes. First, the rust compiler still uses the C++-like _Z mangling, but with its own twist -- some hex digits added to the end of a symbol. So, while gdb finds the correct name of "main": (top-gdb) p name $13 =3D 0x292e0c0 "rustc_gdb_1031745::main" It isn't found in the minsyms, because C++ demangling yields: [99] t 0x90c0 _ZN17rustc_gdb_10317454main17h5b5be7fe16a97225E section .= text rustc_gdb_1031745::main::h5b5be7fe16a97225 zko06yobckx336v This could perhaps be fixed. I also filed a new PR to suggest preferring the linkage name of the main program. Next, the rust compiler emits both a DW_TAG_subprogram and a DW_TAG_namespace for "main". This happens because the file is named "main.rs" -- i.e., the bug is specific to the source file name. The crash also seems to require the nested function inside of 'main', at least for me. The namespace always is generated, but perhaps this changes the ordering in the DWARF. When inside_main_func looks up the main symbol, it finds the namespace symbol rather than the function. (I filed a bug about fixing gdb's symbol tables -- long overdue.) Meanwhile, as I think it's important to fix this crash sooner rather than later, this patch changes inside_main_func to check that the symbol that is found is LOC_BLOCK. This perhaps should have been done in the first place, anyway. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D30158 (cherry picked from commit 5f056fcb3dce947447063f5ab225042177a59722) --=20 You are receiving this mail because: You are on the CC list for the bug.=