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Alex Bennée 453d50ce75 accel/tcg: re-factor plugin_inject_cb so we can assert insn_idx is valid
Coverity doesn't know enough about how we have arranged our plugin TCG
ops to know we will always have incremented insn_idx before injecting
the callback. Let us assert it for the benefit of Coverity and protect
ourselves from accidentally breaking the assumption and triggering
harder to grok errors deeper in the code if we attempt a negative
indexed array lookup.

However to get to this point we re-factor the code and remove the
second hand instruction boundary detection in favour of scanning the
full set of ops and using the existing INDEX_op_insn_start to cleanly
detect when the instruction has started. As we no longer need the
plugin specific list of ops we delete that.

My initial benchmarks shows no discernible impact of dropping the
plugin specific ops list.

Fixes: Coverity 1459509
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20210917162332.3511179-12-alex.bennee@linaro.org>
2021-10-12 08:38:10 +01:00
.github
.gitlab/issue_templates
.gitlab-ci.d gitlab: fix passing of TEST_TARGETS env to cirrus 2021-10-12 08:37:05 +01:00
accel accel/tcg: re-factor plugin_inject_cb so we can assert insn_idx is valid 2021-10-12 08:38:10 +01:00
audio audio: Never send migration section 2021-08-10 10:55:57 +02:00
authz
backends hostmem: Add hostmem-epc as a backend for SGX EPC 2021-09-30 14:50:19 +02:00
block mirror: Handle errors after READY cancel 2021-10-07 10:26:35 -07:00
bsd-user user: Remove cpu_get_pic_interrupt() stubs 2021-09-14 12:00:21 -07:00
capstone@f8b1b83301
chardev qapi: Convert simple union SocketAddressLegacy to flat one 2021-09-27 08:23:25 +02:00
configs target-arm queue: 2021-09-30 21:16:54 +01:00
contrib elf2dmp: Fail cleanly if PDB file specifies zero block_size 2021-09-20 09:54:32 +01:00
crypto
disas disas/riscv: Add Zb[abcs] instructions 2021-10-07 08:41:33 +10:00
docs meson: switch minimum meson version to 0.58.2, minimum recommended to 0.59.2 2021-10-05 13:10:29 +02:00
dtc@85e5d83984
dump
ebpf ebpf: only include in system emulators 2021-09-17 16:07:52 +08:00
fpu softfloat: Remove assertion preventing silencing of NaN in default-NaN mode 2021-09-01 11:08:17 +01:00
fsdev
gdb-xml target/arm: Don't put FPEXC and FPSID in org.gnu.gdb.arm.vfp XML 2021-09-30 13:42:10 +01:00
hw q800: wire macfb IRQ to separate video interrupt on VIA2 2021-10-08 13:31:03 +02:00
include accel/tcg: re-factor plugin_inject_cb so we can assert insn_idx is valid 2021-10-12 08:38:10 +01:00
io build-sys: add HAVE_IPPROTO_MPTCP 2021-09-30 15:30:25 +02:00
libdecnumber
linux-headers
linux-user linux-user: Remove default for TARGET_ARCH_HAS_SIGTRAMP_PAGE 2021-10-01 12:03:48 +02:00
meson@b25d94e7c7 meson: bump submodule to 0.59.2 2021-10-05 13:10:29 +02:00
migration migration: add missing qemu_mutex_lock_iothread in migration_completion 2021-10-05 13:10:29 +02:00
monitor monitor: Rate-limit MEMORY_DEVICE_SIZE_CHANGE qapi events per device 2021-10-02 08:43:21 +02:00
nbd block/nbd: drop connection_co 2021-09-29 13:46:33 -05:00
net vhost-vdpa: remove the unncessary queue_index assignment 2021-09-04 17:34:05 -04:00
pc-bios tests: qtest: bios-tables-test depends on the unpacked edk2 ROMs 2021-09-30 15:30:24 +02:00
plugins plugins/: Add missing functions to symbol list 2021-10-12 08:37:05 +01:00
po
python python/aqmp-tui: Add syntax highlighting 2021-09-27 12:10:29 -04:00
qapi * -smp cleanpus (Yanan) 2021-10-03 08:45:19 -04:00
qga qapi: Add spaces after symbol declaration for consistency 2021-10-02 07:33:41 +02:00
qobject
qom qom: use correct field name when getting/setting alias properties 2021-07-23 18:17:17 +02:00
replay
roms Update OpenBIOS images to d657b653 built from submodule. 2021-09-08 10:30:10 +01:00
scripts meson: switch minimum meson version to 0.58.2, minimum recommended to 0.59.2 2021-10-05 13:10:29 +02:00
scsi error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
semihosting linux-user: Don't include gdbstub.h in qemu.h 2021-09-13 20:35:45 +02:00
slirp@a88d9ace23 Update libslirp to v4.6.1 2021-08-03 16:07:22 +04:00
softmmu softmmu/memory_mapping: optimize for RamDiscardManager sections 2021-10-02 08:43:22 +02:00
storage-daemon qemu-storage-daemon: Only display FUSE help when FUSE is built-in 2021-10-06 10:25:55 +02:00
stubs qapi/qdev.json: add DEVICE_UNPLUG_GUEST_ERROR QAPI event 2021-09-30 12:25:51 +10:00
subprojects/libvhost-user libvhost-user: fix -Werror=format= warnings with __u64 fields 2021-07-29 10:15:52 +02:00
target target/s390x: move tcg_gen_insn_start to s390x_tr_insn_start 2021-10-12 08:37:53 +01:00
tcg tcg/s390x: Implement TCG_TARGET_HAS_cmpsel_vec 2021-10-05 16:53:17 -07:00
tests tests/docker: promote debian-riscv64-cross to a full image 2021-10-12 08:37:05 +01:00
tools virtiofsd pull 2021-08-16 2021-09-19 18:53:29 +01:00
trace trace: Split guest_mem_before 2021-10-05 16:53:17 -07:00
ui ui/gtk-egl: Wait for the draw signal for dmabuf blobs 2021-09-15 08:41:59 +02:00
util * SGX implementation for x86 2021-09-30 17:38:31 +01:00
.cirrus.yml
.dir-locals.el
.editorconfig
.exrc
.gdbinit
.gitattributes
.gitignore gitignore: Update with some filetypes 2021-07-23 17:22:15 +01:00
.gitlab-ci.yml docs: Document GitLab custom CI/CD variables 2021-07-29 07:56:01 +02:00
.gitmodules
.gitpublish
.mailmap MAINTAINERS: Name and email address change 2021-08-10 16:42:16 +01:00
.patchew.yml
.readthedocs.yml
.travis.yml travis.yml: Remove the "Release tarball" job 2021-10-12 08:37:05 +01:00
block.c block: bdrv_insert_node(): don't use bdrv_open() 2021-10-06 10:25:55 +02:00
blockdev-nbd.c
blockdev.c job: @force parameter for job_cancel_sync() 2021-10-07 10:42:09 +02:00
blockjob.c
configure configure: don't override the selected host test compiler if defined 2021-10-12 08:37:05 +01:00
COPYING
COPYING.LIB
cpu.c accel/tcg: Record singlestep_enabled in tb->cflags 2021-07-21 07:47:05 -10:00
cpus-common.c
disas.c
gdbstub.c linux-user: Don't include gdbstub.h in qemu.h 2021-09-13 20:35:45 +02:00
gitdm.config contrib/gitdm: add a new interns group-map for GSoC/Outreachy work 2021-07-23 17:22:16 +01:00
hmp-commands-info.hx target/i386: Add HMP and QMP interfaces for SGX 2021-09-30 15:30:24 +02:00
hmp-commands.hx hmp: Drop a bogus sentence from set_password's documentation 2021-09-27 10:57:21 +02:00
iothread.c iothread: use IOThreadParamInfo in iothread_[set|get]_param() 2021-10-07 15:29:50 +01:00
job-qmp.c
job.c mirror: Do not clear .cancelled 2021-10-07 10:42:50 +02:00
Kconfig
Kconfig.host
LICENSE
MAINTAINERS MAINTAINERS: Demote sPAPR from "Supported" to "Maintained" 2021-09-30 12:26:06 +10:00
Makefile Makefile: ignore long options 2021-07-29 10:15:51 +02:00
memory_ldst.c.inc
meson_options.txt meson_options.txt: Switch the default value for the vnc option to 'auto' 2021-09-30 15:30:25 +02:00
meson.build tcg/s390x: Rename from tcg/s390 2021-10-05 16:53:17 -07:00
module-common.c
os-posix.c
os-win32.c
page-vary-common.c
page-vary.c
qemu-bridge-helper.c
qemu-edid.c
qemu-img-cmds.hx qemu-img: Add -F shorthand to convert 2021-09-15 18:42:38 +02:00
qemu-img.c qemu-img: Add -F shorthand to convert 2021-09-15 18:42:38 +02:00
qemu-io-cmds.c
qemu-io.c error: Use error_fatal to simplify obvious fatal errors (again) 2021-08-26 17:15:28 +02:00
qemu-keymap.c
qemu-nbd.c qemu-nbd: Change default cache mode to writeback 2021-09-29 13:46:31 -05:00
qemu-options.hx qemu-options: Add missing "sockets=2, maxcpus=2" to CLI "-smp 2" 2021-10-04 09:47:26 +02:00
qemu.nsi
qemu.sasl
README.rst
replication.c
thunk.c linux-user: Drop unneeded includes from qemu.h 2021-09-13 20:35:45 +02:00
trace-events trace: Split guest_mem_before 2021-10-05 16:53:17 -07:00
VERSION Open 6.2 development tree 2021-08-25 10:25:12 +01:00
version.rc

===========
QEMU README
===========

QEMU is a generic and open source machine & userspace emulator and
virtualizer.

QEMU is capable of emulating a complete machine in software without any
need for hardware virtualization support. By using dynamic translation,
it achieves very good performance. QEMU can also integrate with the Xen
and KVM hypervisors to provide emulated hardware while allowing the
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
near native performance for CPUs. When QEMU emulates CPUs directly it is
capable of running operating systems made for one machine (e.g. an ARMv7
board) on a different machine (e.g. an x86_64 PC board).

QEMU is also capable of providing userspace API virtualization for Linux
and BSD kernel interfaces. This allows binaries compiled against one
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
different architecture ABI (e.g. the Linux x86_64 ABI). This does not
involve any hardware emulation, simply CPU and syscall emulation.

QEMU aims to fit into a variety of use cases. It can be invoked directly
by users wishing to have full control over its behaviour and settings.
It also aims to facilitate integration into higher level management
layers, by providing a stable command line interface and monitor API.
It is commonly invoked indirectly via the libvirt library when using
open source applications such as oVirt, OpenStack and virt-manager.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


Documentation
=============

Documentation can be found hosted online at
`<https://www.qemu.org/documentation/>`_. The documentation for the
current development version that is available at
`<https://www.qemu.org/docs/master/>`_ is generated from the ``docs/``
folder in the source tree, and is built by `Sphinx
<https://www.sphinx-doc.org/en/master/>_`.


Building
========

QEMU is multi-platform software intended to be buildable on all modern
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
of other UNIX targets. The simple steps to build QEMU are:


.. code-block:: shell

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

* `<https://qemu.org/Hosts/Linux>`_
* `<https://qemu.org/Hosts/Mac>`_
* `<https://qemu.org/Hosts/W32>`_


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

.. code-block:: shell

   git clone https://gitlab.com/qemu-project/qemu.git

When submitting patches, one common approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the
qemu-devel@nongnu.org mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the `style section
<https://www.qemu.org/docs/master/devel/style.html>` of
the Developers Guide.

Additional information on submitting patches can be found online via
the QEMU website

* `<https://qemu.org/Contribute/SubmitAPatch>`_
* `<https://qemu.org/Contribute/TrivialPatches>`_

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://gitlab.com/qemu-project/qemu-web.git

* `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_

A 'git-publish' utility was created to make above process less
cumbersome, and is highly recommended for making regular contributions,
or even just for sending consecutive patch series revisions. It also
requires a working 'git send-email' setup, and by default doesn't
automate everything, so you may want to go through the above steps
manually for once.

For installation instructions, please go to

*  `<https://github.com/stefanha/git-publish>`_

The workflow with 'git-publish' is:

.. code-block:: shell

  $ git checkout master -b my-feature
  $ # work on new commits, add your 'Signed-off-by' lines to each
  $ git publish

Your patch series will be sent and tagged as my-feature-v1 if you need to refer
back to it in the future.

Sending v2:

.. code-block:: shell

  $ git checkout my-feature # same topic branch
  $ # making changes to the commits (using 'git rebase', for example)
  $ git publish

Your patch series will be sent with 'v2' tag in the subject and the git tip
will be tagged as my-feature-v2.

Bug reporting
=============

The QEMU project uses GitLab issues to track bugs. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://gitlab.com/qemu-project/qemu/-/issues>`_

If using QEMU via an operating system vendor pre-built binary package, it
is preferable to report bugs to the vendor's own bug tracker first. If
the bug is also known to affect latest upstream code, it can also be
reported via GitLab.

For additional information on bug reporting consult:

* `<https://qemu.org/Contribute/ReportABug>`_


ChangeLog
=========

For version history and release notes, please visit
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for
more detailed information.


Contact
=======

The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

* `<mailto:qemu-devel@nongnu.org>`_
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_
* #qemu on irc.oftc.net

Information on additional methods of contacting the community can be
found online via the QEMU website:

* `<https://qemu.org/Contribute/StartHere>`_