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Mon, 08 Jun 2026 05:05:03 -0700 (PDT) Received: from dorian.sou.embecosm-corp.com ([212.69.42.53]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4601f2dcad5sm57027363f8f.5.2026.06.08.05.05.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jun 2026 05:05:02 -0700 (PDT) From: Craig Blackmore To: gdb-patches@sourceware.org Cc: aburgess@redhat.com, eliz@gnu.org, Craig Blackmore Subject: [PATCH v5 0/1] gdb: Add python support for demangling register unwind values Date: Mon, 8 Jun 2026 13:04:36 +0100 Message-ID: <20260608120437.566738-1-craig.blackmore@embecosm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260520131607.32885-1-craig.blackmore@embecosm.com> References: <20260520131607.32885-1-craig.blackmore@embecosm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 version addresses review comments from Andrew Burgess and Eli Zaretskii from: https://sourceware.org/pipermail/gdb-patches/2026-May/227549.html https://sourceware.org/pipermail/gdb-patches/2026-May/227536.html Changes since v4: * Change `demangle` method to `read`. * Refer to transforming instead of demangling in the code and documentation. * Fix long line in python.texi. * Rebase. Changes since v3: * Change lval_type to lvalue type in NEWS and python documentation. * Remove line about future support for multiple transformers or different loci from python documentation. Changes since v2: * Removed RFC from subject. * Changed `gdb.unwinder.UnwindRegisterValueDemangler` to `gdb.unwinder.UnwindRegisterValueTransformer` so that other transform methods could be supported in future rather than being restricted to demangling only. Demangling is now done by calling the `demangle` method instead of `__call__`. * Made transformer registration similar to unwinder registration to allow future support for registering multiple transformers and registering to other loci. * Call `invalidate_cached_frames` after registering a transformer. * Made `gdb.unwinder.UnwindRegisterValueTransformer.name` read-only and added type check. * Pass `gdb.Frame` to demanglers instead of `frame_type`. * Added global `python_transformer_enabled` to `py-unwind.c` which python sets when any transformer is registered. This allows us to skip entering the python environment when demangling and no transformers are registered. * Replaced `gdb.Value.is_lval_register` and `gdb.Value.is_lval_memory` read-only boolean attributes with `gdb.Value.lval_type` read-only type attribute. * Removed redundant `return` after call to `error`. * Replaced `NULL` with `nullptr`. * Added tests for invalid registration and invalid return value from demangler. * Updated tests and documentation to match the above changes. * Rebased. Craig Blackmore (1): gdb: Add python support for transforming register unwind values gdb/NEWS | 17 ++ gdb/doc/python.texi | 96 ++++++++++ gdb/extension-priv.h | 8 + gdb/extension.c | 35 ++++ gdb/extension.h | 6 + gdb/frame.c | 10 ++ gdb/guile/guile.c | 2 + gdb/python/lib/gdb/__init__.py | 21 +++ gdb/python/lib/gdb/unwinder.py | 93 +++++++++- gdb/python/py-registers.c | 2 +- gdb/python/py-unwind.c | 169 ++++++++++++++++++ gdb/python/py-value.c | 21 +++ gdb/python/python-internal.h | 3 + gdb/python/python.c | 4 +- .../gdb.python/py-unwind-transformer-error.py | 33 ++++ .../gdb.python/py-unwind-transformer.c | 80 +++++++++ .../gdb.python/py-unwind-transformer.exp | 115 ++++++++++++ .../gdb.python/py-unwind-transformer.py | 48 +++++ gdb/testsuite/gdb.python/py-value.exp | 8 + 19 files changed, 768 insertions(+), 3 deletions(-) create mode 100644 gdb/testsuite/gdb.python/py-unwind-transformer-error.py create mode 100644 gdb/testsuite/gdb.python/py-unwind-transformer.c create mode 100644 gdb/testsuite/gdb.python/py-unwind-transformer.exp create mode 100644 gdb/testsuite/gdb.python/py-unwind-transformer.py -- 2.43.0