gh-155725: Remove PyGILState_Ensure usage from tracemalloc by kumaraditya303 · Pull Request #156409 · python/cpython

kumaraditya303 · 2026-08-26T09:40:14Z

tracemalloc no longer acquires the GIL nor creates a temporary thread state when tracing memory allocations.

Issue: tracemalloc raw-domain allocator hook violates PYMEM_DOMAIN_RAW contract #155725

tracemalloc no longer acquires the GIL nor creates a temporary thread state when tracing memory allocations. A thread with no attached thread state now records the trace with the "<unknown>" traceback instead of attaching a thread state to capture the Python traceback. Threads without a thread state used to pay for a GIL acquisition plus a full thread state creation and destruction on every traced raw allocation, only to record an empty traceback anyway.

read-the-docs-community · 2026-08-26T09:45:36Z

Documentation build overview

📚 cpython-previews | 🛠️ Build #34238669 | 📁 Comparing 69d37ec against main (7f0ccd6)

🔍 Preview build

2 files changed

± c-api/memory.html
± whatsnew/changelog.html

…e attached Store traceback frame filenames as interned NUL terminated UTF-8 strings instead of Python str objects, so that capturing a traceback no longer uses or modifies Python objects. Threads without an attached thread state now capture their Python traceback by walking the frames of the thread state most recently bound to the thread; only threads which never had a thread state record the traceback as "<unknown>".

ZeroIntensity

Thanks, this is a much better approach.

… traceback

ZeroIntensity

LGTM

gpshead

agreed that this is the right thing to do. maybe mention in the NEWS entry that the printed filename format changes slightly for higher value Unicode, it's a utf-8 value with \xNN escapes rather than using a mix of \xNN \uNNNN and \UNNNNNNNN. in practice it should not be a big deal, its debugging data and all the data is there.

miss-islington-app · 2026-08-30T07:35:21Z

Thanks @kumaraditya303 for the PR 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖

bedevere-app · 2026-08-30T07:35:34Z

GH-156628 is a backport of this pull request to the 3.15 branch.

…GH-156409) (#156628) Co-authored-by: Kumar Aditya <kumaraditya@python.org>

bedevere-bot · 2026-08-31T07:12:52Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Clang Installed 3.15 (tier-3) has failed when building commit c168fbc.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/2046/builds/333) and take a look at the build logs.
Check if the failure is related to this commit (c168fbc) or if it is a false positive.
If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

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Summary of the results of the build (if available):

Click to see traceback logs

Note: switching to 'c168fbc84a061bd5acd02f55eabb6068d2b58e9b'.

You are in 'detached HEAD' state. You can look around, make experimental
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Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at c168fbc84a061 [3.15] gh-155725: Remove `PyGILState_Ensure` usage from `tracemalloc` (GH-156409) (#156628)
Switched to and reset branch '3.15'

configure: WARNING: s390x-ibm-linux-gnu/clang is not supported
configure: WARNING:

Platform "s390x-ibm-linux-gnu" with compiler "clang" is not supported by the
CPython core team, see https://peps.python.org/pep-0011/ for more information.


Objects/unicodeobject.c:4902:1: warning: unused function 'ctz' [-Wunused-function]
 4902 | ctz(size_t v)
      | ^~~
1 warning generated.
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:285:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  285 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:292:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  292 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:438:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  438 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:445:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  445 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:551:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  551 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:560:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  560 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:582:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  582 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:593:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  593 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:690:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  690 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:735:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  735 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:761:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  761 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:772:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  772 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:785:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  785 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:930:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  930 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:943:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  943 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:960:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  960 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
./Modules/expat/xmltok_impl.c:118:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  118 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:967:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  967 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:1202:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1202 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ./Modules/expat/xmltok.c:312:
./Modules/expat/xmltok_impl.c:1222:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1222 |           CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |           ^
./Modules/expat/xmltok_impl.c:89:5: note: expanded from macro 'CHECK_NAME_CASES'
   89 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
./Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
19 warnings generated.

ERROR: Could not install packages due to an OSError: [Errno 28] No space left on device: '/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/target/lib/python3.15/site-packages/pip/_vendor/rich/json.py'

Traceback (most recent call last):
  File "<frozen runpy>", line 201, in _run_module_as_main
  File "<frozen runpy>", line 87, in _run_code
  File "/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/Lib/ensurepip/__main__.py", line 5, in <module>
    sys.exit(ensurepip._main())
             ~~~~~~~~~~~~~~~^^
  File "/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/Lib/ensurepip/__init__.py", line 269, in _main
    return _bootstrap(
        root=args.root,
    ...<4 lines>...
        default_pip=args.default_pip,
    )
  File "/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/Lib/ensurepip/__init__.py", line 184, in _bootstrap
    return _run_pip([*args, "pip"], [os.fsdecode(tmp_wheel_path)])
  File "/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/Lib/ensurepip/__init__.py", line 88, in _run_pip
    return subprocess.run(cmd, check=True).returncode
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/Lib/subprocess.py", line 692, in run
    raise CalledProcessError(retcode, process.args,
                             output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['/var/lib/buildbot/worker/cstratak-fedora-stable-s390x/3.15.cstratak-fedora-stable-s390x.clang-installed/build/python', '-W', 'ignore::DeprecationWarning', '-c', '\nimport runpy\nimport sys\nsys.path = [\'/tmp/tmpwa2qzwif/pip-26.2.1-py3-none-any.whl\'] + sys.path\nsys.argv[1:] = [\'install\', \'--no-cache-dir\', \'--no-index\', \'--find-links\', \'/tmp/tmpwa2qzwif\', \'--root\', \'/\', \'--upgrade\', \'pip\']\nrunpy.run_module("pip", run_name="__main__", alter_sys=True)\n']' returned non-zero exit status 1.
make: *** [Makefile:2599: install] Error 1

bedevere-bot · 2026-08-31T07:14:32Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable LTO + PGO 3.15 (tier-3) has failed when building commit c168fbc.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/2117/builds/325) and take a look at the build logs.
Check if the failure is related to this commit (c168fbc) or if it is a false positive.
If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/2117/builds/325

Summary of the results of the build (if available):

Click to see traceback logs

Note: switching to 'c168fbc84a061bd5acd02f55eabb6068d2b58e9b'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at c168fbc84a06 [3.15] gh-155725: Remove `PyGILState_Ensure` usage from `tracemalloc` (GH-156409) (#156628)
Switched to and reset branch '3.15'

find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
make[2]: [Makefile:3504: clean-retain-profile] Error 1 (ignored)
./Modules/socketmodule.c: In function ‘getsockaddrarg’:
./Modules/socketmodule.c:2648:9: warning: ‘strncpy’ specified bound 64 equals destination size [-Wstringop-truncation]
 2648 |         strncpy((char *)sa->salg_name, name, sizeof(sa->salg_name));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld.bfd: final link failed: No space left on device
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:3832: Modules/_ctypes.cpython-315-s390x-linux-gnu.so] Error 1
make[2]: *** Waiting for unfinished jobs....
/usr/bin/ld.bfd: final link failed: No space left on device
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:3943: Modules/_testclinic.cpython-315-s390x-linux-gnu.so] Error 1
/usr/bin/ld.bfd: final link failed: No space left on device
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:3913: Modules/_testcapi.cpython-315-s390x-linux-gnu.so] Error 1
/usr/bin/ld.bfd: final link failed: No space left on device
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:3941: Modules/_testlimitedcapi.cpython-315-s390x-linux-gnu.so] Error 1
/tmp/ccYa8Ag4.s: Assembler messages:
/tmp/ccYa8Ag4.s: Fatal error: can't write 3951 bytes to section .gnu.lto_.jmpfuncs.57e3ba4d4d87d23b of Modules/_ctypes/_ctypes_test.o: 'No space left on device'
/tmp/ccYa8Ag4.s: Fatal error: Modules/_ctypes/_ctypes_test.o: No such file or directory
make[2]: *** [Makefile:3952: Modules/_ctypes/_ctypes_test.o] Error 1
make[1]: *** [Makefile:1031: profile-gen-stamp] Error 2
make: *** [Makefile:1043: profile-run-stamp] Error 2

bedevere-bot · 2026-08-31T07:15:38Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable LTO 3.15 (tier-3) has failed when building commit c168fbc.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/2045/builds/320) and take a look at the build logs.
Check if the failure is related to this commit (c168fbc) or if it is a false positive.
If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/2045/builds/320

Summary of the results of the build (if available):

Click to see traceback logs

Note: switching to 'c168fbc84a061bd5acd02f55eabb6068d2b58e9b'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at c168fbc84a06 [3.15] gh-155725: Remove `PyGILState_Ensure` usage from `tracemalloc` (GH-156409) (#156628)
Switched to and reset branch '3.15'

/tmp/ccUliAIV.s: Assembler messages:
/tmp/ccUliAIV.s: Fatal error: Modules/_interpchannelsmodule.o: No space left on device
/tmp/ccZJWgjH.s: Assembler messages:
/tmp/ccZJWgjH.s: Fatal error: can't write 2829 bytes to section .gnu.lto__statistics__normal_dist_inv_cdf_impl.2.87e23ccb5d25ea93 of Modules/_statisticsmodule.o: 'No space left on device'
make: *** [Makefile:3739: Modules/_interpchannelsmodule.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [Makefile:3749: Modules/_statisticsmodule.o] Error 1
/tmp/cclfvjfE.s: Assembler messages:
/tmp/cclfvjfE.s: Fatal error: can't write 2685 bytes to section .gnu.lto_load_stack_global.184.79d15db74876158d of Modules/_pickle.o: 'No space left on device'
/tmp/cclfvjfE.s: Fatal error: Modules/_pickle.o: No such file or directory
make: *** [Makefile:3716: Modules/_pickle.o] Error 1
Assembler messages:
Fatal error: can't create Modules/cmathmodule.o: No space left on device
make: *** [Makefile:3747: Modules/cmathmodule.o] Error 1
Assembler messages:
Fatal error: can't create Modules/_zoneinfo.o: No space left on device
make: *** [Makefile:3743: Modules/_zoneinfo.o] Error 1
/tmp/ccGG1uFA.s: Assembler messages:
/tmp/ccGG1uFA.s: Fatal error: can't write 3586 bytes to section .text of Objects/unicodeobject.o: 'No space left on device'
/tmp/ccGG1uFA.s: Fatal error: Objects/unicodeobject.o: No such file or directory
make: *** [Makefile:3410: Objects/unicodeobject.o] Error 1
Assembler messages:
Fatal error: can't create Modules/mathmodule.o: No space left on device
make: *** [Makefile:3745: Modules/mathmodule.o] Error 1
Assembler messages:
Fatal error: can't create Modules/binascii.o: No space left on device
make: *** [Makefile:3753: Modules/binascii.o] Error 1
Assembler messages:
Fatal error: can't create Modules/_decimal/_decimal.o: No space left on device
make: *** [Makefile:3751: Modules/_decimal/_decimal.o] Error 1

kumaraditya303 requested a review from ZeroIntensity as a code owner August 26, 2026 09:40

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tracemalloc raw-domain allocator hook violates PYMEM_DOMAIN_RAW contract #155725

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kumaraditya303 requested a review from vstinner August 26, 2026 09:50

kumaraditya303 added 2 commits August 26, 2026 21:50

pythongh-155725: Revert Doc/c-api/memory.rst changes

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pythongh-155725: Hold a finalization guard while capturing a detached…

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… traceback

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kumaraditya303 merged commit 6b1b90f into python:main Aug 30, 2026
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kumaraditya303 deleted the tracemalloc branch August 30, 2026 07:34

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kumaraditya303 added the needs backport to 3.15 pre-release feature fixes, bugs and security fixes label Aug 30, 2026

bedevere-app Bot removed the needs backport to 3.15 pre-release feature fixes, bugs and security fixes label Aug 30, 2026

hugovk pushed a commit that referenced this pull request Aug 31, 2026

[3.15] gh-155725: Remove PyGILState_Ensure usage from tracemalloc (…

c168fbc

…GH-156409) (#156628) Co-authored-by: Kumar Aditya <kumaraditya@python.org>

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gh-155725: Remove PyGILState_Ensure usage from tracemalloc - #156409

gh-155725: Remove PyGILState_Ensure usage from tracemalloc#156409
kumaraditya303 merged 4 commits into
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kumaraditya303:tracemalloc

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kumaraditya303 commented Aug 26, 2026 •

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