When running applications which make large (sparsely populated) address ranges
(e.g. when using address sanitizer with LibAFL) the inability to exclude these
regions from any core dump can result in very large files which fill the disk.
A coredump is obvously very useful for performing a post-mortem when fuzzing.
Whilst the man pages state that madvise provides only a hint (and hence can be
ignored), this patch adds support to handle MADV_DONTDUMP and set a
corresponding flag in the page flags, thus allowing QEMU to exclude these
regions from the core file.
This reverts commit 7987d2be5a8bc3a502f89ba8cf3ac3e09f64d1ce.
The goal was to remove the need to patch the (const) input buffer
with a recomputed UDP checksum by copying headers to a RW region and
inject the checksum there. The patch computed the checksum only from the
header fields (missing the rest of the payload) producing an invalid one
and making guests fail to acquire a DHCP lease.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2727
Cc: qemu-stable@nongnu.org
Signed-off-by: Antoine Damhet <adamhet@scaleway.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250408145345.142947-1-adamhet@scaleway.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
On MacOS, UI event loop has to be ran in the main thread of a process.
Because of that restriction, on this platform, qemu main event loop is
ran on another thread [1].
This breaks record/replay feature, which expects thread running qemu_init
to initialize hold this lock, breaking associated functional tests on
MacOS.
Thus, as a generalization, and similar to how BQL is handled, we release
it after init, and reacquire the lock before entering main event loop,
avoiding a special case if a separate thread is used.
Tested on MacOS with:
$ meson test -C build --setup thorough --print-errorlogs \
func-x86_64-x86_64_replay func-arm-arm_replay func-aarch64-aarch64_replay
$ ./build/qemu-system-x86_64 -nographic -icount shift=auto,rr=record,rrfile=replay.log
$ ./build/qemu-system-x86_64 -nographic -icount shift=auto,rr=replay,rrfile=replay.log
[1] f5ab12caba
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2907
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250410225550.46807-2-pierrick.bouvier@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
- properly exit aarch64-softmmu tcg tests on unexpected exceptions
- fix deadlock when uninstalling a plugin
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Merge tag 'pull-10.0-final-fixes-090425-1' of https://gitlab.com/stsquad/qemu into staging
Final fixes for 10.0
- properly exit aarch64-softmmu tcg tests on unexpected exceptions
- fix deadlock when uninstalling a plugin
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# gpg: Signature made Wed 09 Apr 2025 05:37:49 EDT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* tag 'pull-10.0-final-fixes-090425-1' of https://gitlab.com/stsquad/qemu:
tests/tcg/plugins: add plugin to test reset and uninstall
plugins/loader: fix deadlock when resetting/uninstalling a plugin
tests/tcg: fix semihosting SYS_EXIT for aarch64 in boot.S
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
With acce728cbc6c we disallowed configuring 64-bit guests on
32-bit hosts, but forgot to document that in removed-features.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
In msys2 distribution objdump from gcc is using single tab character
prefix, but objdump from clang is using 4 white space characters instead.
The script will not identify any dll dependencies for a QEMU build
generated with clang. This in turn will fail the build, because there
will be no files inside dlldir and no setup file will be created.
Instead of checking for whitespace in prefix use lstrip to accommodate
for differences in outputs.
Signed-off-by: Arthur Sengileyev <arthur.sengileyev@gmail.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
We perform a plugin reset, uninstall, and make sure we went through
those steps.
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20250404032027.430575-3-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
