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Wed, 06 Nov 2024 14:26:06 -0500 X-MC-Unique: mDhRMHuzNkOlXrwzg8Jd_A-1 X-Mimecast-MFC-AGG-ID: mDhRMHuzNkOlXrwzg8Jd_A Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 113E81955EA7 for ; Wed, 6 Nov 2024 19:26:06 +0000 (UTC) Received: from f41-1.lan (unknown [10.22.81.112]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 371CC1955F41; Wed, 6 Nov 2024 19:26:05 +0000 (UTC) From: Kevin Buettner To: gdb-patches@sourceware.org Cc: Kevin Buettner Subject: [PATCH v4 01/11] Don't attempt to find TLS address when target has no registers Date: Wed, 6 Nov 2024 12:21:37 -0700 Message-ID: <20241106192517.206988-2-kevinb@redhat.com> In-Reply-To: <20241106192517.206988-1-kevinb@redhat.com> References: <20241106192517.206988-1-kevinb@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: jr_skPRKeAYDpM72403fPixuaNfxVw3WSDJ-6uUj34U_1730921166 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org This commit fixes two bugs, one of which is Bug 25807 - that one is fixed by the change in findvar.c. I found it while testing on aarch64; it turned a KFAIL for gdb.threads/tls.exp: print a_thread_local into a FAIL due to a GDB internal error. In addition to the existing test just noted, I've also added a test to the new test case gdb.base/tls-nothreads.exp. It'll be tested, using different scenarios, up to 8 times: PASS: gdb.base/tls-nothreads.exp: default: force_internal_tls=false: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: default: force_internal_tls=true: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: static: force_internal_tls=false: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: static: force_internal_tls=true: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads: force_internal_tls=false: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads: force_internal_tls=true: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads-static: force_internal_tls=false: after exit: print tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads-static: force_internal_tls=true: after exit: print tls_tbss_1 There is a related problem that's fixed by the minsyms.c change. It can be observed when debugging a program without debugging symbols when the program is not executing. I've written a new test for this, but it's included in the new test case gdb.base/tls-nothreads.exp, found later in this series. Depending on the target, it'll be run up to 8 times for different targets. E.g., on aarch64, I'm seeing these PASSes, all of which test this change: PASS: gdb.base/tls-nothreads.exp: default: force_internal_tls=false: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: default: force_internal_tls=true: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: static: force_internal_tls=false: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: static: force_internal_tls=true: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads: force_internal_tls=false: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads: force_internal_tls=true: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads-static: force_internal_tls=false: stripped: after exit: print (int) tls_tbss_1 PASS: gdb.base/tls-nothreads.exp: pthreads-static: force_internal_tls=true: stripped: after exit: print (int) tls_tbss_1 Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=25807 --- gdb/findvar.c | 7 ++++++- gdb/minsyms.c | 8 +++++++- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/gdb/findvar.c b/gdb/findvar.c index f7760aa61ca..a530e679c8a 100644 --- a/gdb/findvar.c +++ b/gdb/findvar.c @@ -485,7 +485,12 @@ language_defn::read_var_value (struct symbol *var, /* Determine address of TLS variable. */ if (obj_section && (obj_section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) - addr = target_translate_tls_address (obj_section->objfile, addr); + { + if (!target_has_registers ()) + error (_("Cannot read `%s' without registers"), + var->print_name ()); + addr = target_translate_tls_address (obj_section->objfile, addr); + } } break; diff --git a/gdb/minsyms.c b/gdb/minsyms.c index 33eb9072e5f..a904bd96045 100644 --- a/gdb/minsyms.c +++ b/gdb/minsyms.c @@ -1684,7 +1684,13 @@ find_minsym_type_and_address (minimal_symbol *msymbol, { /* Skip translation if caller does not need the address. */ if (address_p != NULL) - *address_p = target_translate_tls_address (objfile, addr); + { + if (!target_has_registers ()) + error (_( + "Cannot determine address of TLS symbol `%s' without registers"), + bound_msym.minsym->print_name ()); + *address_p = target_translate_tls_address (objfile, addr); + } return builtin_type (objfile)->nodebug_tls_symbol; } -- 2.46.2