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Author SHA1 Message Date
Alex Bennée f6d1cd4d48 tests/plugins: add instruction matching to libinsn.so 
This adds simple instruction matching to the libinsn.so plugin which
is useful for examining the execution distance between instructions.
For example to track how often we flush in ARM due to TLB updates:

  -plugin ./tests/plugin/libinsn.so,match=tlbi

which leads to output like this:

  0xffffffc01019a918, 'tlbi vale1is, x1', 5702 hits, 31825 match hits, Δ+8112 since last match, 68859 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5703 hits, 56593 match hits, Δ+17712125 since last match, 33455 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5704 hits, 56594 match hits, Δ+12689 since last match, 33454 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5705 hits, 56595 match hits, Δ+12585 since last match, 33454 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5706 hits, 56596 match hits, Δ+10491 since last match, 33454 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5707 hits, 56597 match hits, Δ+4721 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5708 hits, 56598 match hits, Δ+10733 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5709 hits, 56599 match hits, Δ+61959 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5710 hits, 56600 match hits, Δ+55235 since last match, 33454 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5711 hits, 56601 match hits, Δ+54373 since last match, 33454 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5712 hits, 56602 match hits, Δ+2705 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5713 hits, 56603 match hits, Δ+17262 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5714 hits, 56604 match hits, Δ+17206 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5715 hits, 56605 match hits, Δ+28940 since last match, 33453 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5716 hits, 56606 match hits, Δ+7370 since last match, 33452 avg insns/match
  0xffffffc01019a918, 'tlbi vale1is, x1', 5717 hits, 56607 match hits, Δ+7066 since last match, 33452 avg insns/match

showing we do some sort of TLBI invalidation every 33 thousand
instructions.

Cc: Vasilev Oleg <vasilev.oleg@huawei.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Emilio Cota <cota@braap.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220204204335.1689602-25-alex.bennee@linaro.org>
 2022-02-09 12:08:42 +00:00
Alex Bennée 39be9dd30f tests/plugin: allow libinsn.so per-CPU counts 
We won't go fully flexible but for most system emulation 8 vCPUs
resolution should be enough for anybody ;-)

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220204204335.1689602-24-alex.bennee@linaro.org>
 2022-02-09 12:08:42 +00:00
Juro Bystricky d5615bbf91 tests/plugin/syscall.c: fix compiler warnings 
Fix compiler warnings. The warnings can result in a broken build.
This patch fixes warnings such as:

In file included from /usr/include/glib-2.0/glib.h:111,
                 from ../tests/plugin/syscall.c:13:
../tests/plugin/syscall.c: In function ‘print_entry’:
/usr/include/glib-2.0/glib/glib-autocleanups.h:28:3: error: ‘out’ may be
       used uninitialized in this function [-Werror=maybe-uninitialized]
   g_free (*pp);
   ^~~~~~~~~~~~
../tests/plugin/syscall.c:82:23: note: ‘out’ was declared here
     g_autofree gchar *out;
                       ^~~
In file included from /usr/include/glib-2.0/glib.h:111,
                 from ../tests/plugin/syscall.c:13:
../tests/plugin/syscall.c: In function ‘vcpu_syscall_ret’:
/usr/include/glib-2.0/glib/glib-autocleanups.h:28:3: error: ‘out’ may be
        used uninitialized in this function [-Werror=maybe-uninitialized]
   g_free (*pp);
   ^~~~~~~~~~~~
../tests/plugin/syscall.c:73:27: note: ‘out’ was declared here
         g_autofree gchar *out;
                           ^~~
cc1: all warnings being treated as errors

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20211128011551.2115468-1-juro.bystricky@intel.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211129140932.4115115-9-alex.bennee@linaro.org>
 2021-11-29 15:13:22 +00:00
Alex Bennée e83f79b3fa tests/plugins: extend the insn plugin to track opcode sizes 
This is mostly a convenience feature for identifying frontends that do
multiple repeat loads so I can test changes to the instruction
tracking interface.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20211026102234.3961636-20-alex.bennee@linaro.org>
 2021-11-04 10:32:01 +00:00
Mahmoud Mandour a694d739bb tests/plugins/syscalls: adhere to new arg-passing scheme 
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-13-ma.mandourr@gmail.com>
 2021-09-02 11:29:34 +01:00
Mahmoud Mandour 5ae589faad tests/plugins/mem: introduce "track" arg and make args not positional 
This commit makes the plugin adhere to the new plugins arg-passing
scheme by expecting full-form boolean args instead of short-form
booleans. This necessitates that we introduce a new argument, here
"track", to accept "r", "w", or "rw".

Also, it makes arguments not positional and we only care about the last
value specified for a certain argument.

callback/inline args are now supplied separately as bool arguments so
that both can be enabled individually.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-12-ma.mandourr@gmail.com>
 2021-09-02 11:29:34 +01:00
Mahmoud Mandour 0163ce3179 tests/plugins/insn: made arg inline not positional and parse it as bool 
Made argument "inline" not positional, this has two benefits. First is
that we adhere to how QEMU passes args generally, by taking the last
value of an argument and drop the others. And the second is that this
sets up a framework for potentially adding new args easily.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-11-ma.mandourr@gmail.com>
[AJB: fix check-tcg tests calling arg=inline]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
 2021-09-02 11:29:34 +01:00
Mahmoud Mandour 30b95b4452 tests/plugins/bb: adapt to the new arg passing scheme 
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-10-ma.mandourr@gmail.com>
 2021-09-02 11:29:34 +01:00
Mahmoud Mandour a6851b49e3 plugins/syscall: Added a table-like summary output 
Added a table-like output which contains the total number of calls
for each used syscall along with the number of errors that occurred.

Per-call tracing is still available through supplying the argument
``print`` to the plugin.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210519032409.3041-1-ma.mandourr@gmail.com>
Message-Id: <20210520174303.12310-9-alex.bennee@linaro.org>
 2021-05-25 16:52:50 +01:00
Matthias Weckbecker 279d0a5b1e plugins: new syscalls plugin 
This commit adds a new syscalls plugin that displays the syscalls
as they are executed and returned. This plugin outputs the number
of the syscall as well as the syscall return value.

Works in *-user only.

Essentially, this commit restores:

  https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg00846.html

by using the new QEMU plugin API.

Signed-off-by: Matthias Weckbecker <matthias@weckbecker.name>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200812115816.4454-1-matthias@weckbecker.name>
Message-Id: <20210312172821.31647-2-alex.bennee@linaro.org>
 2021-03-17 07:17:46 +00:00
Alex Bennée 0eca92e299 tests/plugin: allow memory plugin to do both inline and callbacks 
This is going to be useful for acceptance tests that check both types
are being called the same number of times, especially when icount is
enabled.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210213130325.14781-23-alex.bennee@linaro.org>
 2021-02-18 08:19:23 +00:00
Alex Bennée e025d799af tests/plugin: expand insn test to detect duplicate instructions 
A duplicate insn is one that is appears to be executed twice in a row.
This is currently possible due to -icount and cpu_io_recompile()
causing a re-translation of a block. On it's own this won't trigger
any tests though.

The heuristics that the plugin use can't deal with the x86 rep
instruction which (validly) will look like executing the same
instruction several times. To avoid problems later we tweak the rules
for x86 to run the "inline" version of the plugin. This also has the
advantage of increasing coverage of the plugin code (see bugfix in
previous commit).

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210213130325.14781-15-alex.bennee@linaro.org>
 2021-02-18 08:19:23 +00:00
Yonggang Luo 27d891bca9 plugin: Fixes compiling errors on msys2/mingw 
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201001163429.1348-3-luoyonggang@gmail.com>
Message-Id: <20201007160038.26953-21-alex.bennee@linaro.org>
 2020-10-09 17:27:55 +01:00
Alex Bennée c17a386b6a plugins: move the more involved plugins to contrib 
We have an exploding complexity problem in the testing so lets just
move the more involved plugins into contrib. tests/plugins still exist
for the basic plugins that exercise the API. We restore the old
pre-meson style Makefile for contrib as it also doubles as a guide for
out-of-tree plugin builds.

While we are at it add some examples to the documentation and a
specific plugins build target.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200909112742.25730-11-alex.bennee@linaro.org>
 2020-09-10 10:47:03 +01:00
Paolo Bonzini ffac93df19 meson: convert sample plugins 
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2020-08-21 06:30:43 -04:00
Alex Bennée 406b53c9ca plugins: expand the bb plugin to be thread safe and track per-cpu 
While there isn't any easy way to make the inline counts thread safe
we can ensure the callback based ones are. While we are at it we can
reduce introduce a new option ("idle") to dump a report of the current
bb and insn count each time a vCPU enters the idle state.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
Cc: Dave Bort <dbort@dbort.com>

Message-Id: <20200713200415.26214-8-alex.bennee@linaro.org>
 2020-07-15 11:52:43 +01:00
Alex Bennée 777dddc501 tests/plugins: don't unconditionally add -Wpsabi 
Not all compilers support the -Wpsabi (clang-9 in my case). To handle
this gracefully we pare back the shared build machinery so the
Makefile is relatively "standalone". We still take advantage of
config-host.mak as configure has done a bunch of probing for us but
that is it.

Fixes: bac8d222a
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200713200415.26214-6-alex.bennee@linaro.org>
 2020-07-15 11:52:43 +01:00
Richard Henderson bac8d222a1 configure: Add -Wno-psabi 
On aarch64, gcc 9.3 is generating

qemu/exec.c: In function ‘address_space_translate_iommu’:
qemu/exec.c:431:28: note: parameter passing for argument of type \
  ‘MemTxAttrs’ {aka ‘struct MemTxAttrs’} changed in GCC 9.1

and many other repetitions.  This structure, and the functions
amongst which it is passed, are not part of a QEMU public API.
Therefore we do not care how the compiler passes the argument,
so long as the compiler is self-consistent.

The only portion of QEMU which does have a public api, and so
must have a stable abi, is "qemu/plugin.h".  We test this by
forcing -Wpsabi in tests/plugin/Makefile.

Buglink: https://bugs.launchpad.net/qemu/+bug/1881552
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200617201309.1640952-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2020-06-18 10:26:02 +01:00
Alex Bennée c81950a2f1 plugins: new lockstep plugin for debugging TCG changes 
When we make changes to the TCG we sometimes cause regressions that
are deep into the execution cycle of the guest. Debugging this often
requires comparing large volumes of trace information to figure out
where behaviour has diverged.

The lockstep plugin utilises a shared socket so two QEMU's running
with the plugin will write their current execution position and wait
to receive the position of their partner process. When execution
diverges the plugins output where they were and the previous few
blocks before unloading themselves and letting execution continue.

Originally I planned for this to be most useful with -icount but it
turns out you can get divergence pretty quickly due to asynchronous
qemu_cpu_kick_rr_cpus() events causing one side to eventually run into
a short block a few cycles before the other side. For this reason I've
added a bit of tracking and I think the divergence reporting could be
finessed to report only if we really start to diverge in execution.

An example run would be:

  qemu-system-sparc -monitor none -parallel none -net none \
    -M SS-20 -m 256 -kernel day11/zImage.elf \
    -plugin ./tests/plugin/liblockstep.so,arg=lockstep-sparc.sock \
    -d plugin,nochain

with an identical command in another window in the same working
directory.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
Tested-by: Robert Foley <robert.foley@linaro.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20200610155509.12850-3-alex.bennee@linaro.org>
 2020-06-16 14:49:05 +01:00
Alex Bennée 4e62bfa9ee tests/plugin: correctly honour io_count 
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200605154929.26910-4-alex.bennee@linaro.org>
 2020-06-08 16:59:31 +01:00
Alex Bennée ec11c4a8ec tests/plugins: make howvec clean-up after itself. 
TCG plugins are responsible for their own memory usage and although
the plugin_exit is tied to the end of execution in this case it is
still poor practice. Ensure we delete the hash table and related data
when we are done to be a good plugin citizen.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

Message-Id: <20200225124710.14152-16-alex.bennee@linaro.org>
 2020-02-25 20:20:23 +00:00
Chen Qun 4133686110 tests/plugin: prevent uninitialized warning 
According to the glibc function requirements, we need initialise
 the variable. Otherwise there will be compilation warnings:

glib-autocleanups.h:28:3: warning: ‘out’ may be
used uninitialized in this function [-Wmaybe-uninitialized]
   g_free (*pp);
   ^~~~~~~~~~~~

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200206093238.203984-1-kuhn.chenqun@huawei.com>
[AJB: uses Thomas's single line allocation]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200225124710.14152-13-alex.bennee@linaro.org>
 2020-02-25 20:20:23 +00:00
Alex Bennée 3fb356cc86 tcg plugins: expose an API version concept 
This is a very simple versioning API which allows the plugin
infrastructure to check the API a plugin was built against. We also
expose a min/cur API version to the plugin via the info block in case
it wants to avoid using old deprecated APIs in the future.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
 2019-11-12 14:32:55 +00:00
Alex Bennée 12268df393 tests/plugin: add hotpages to analyse memory access patterns 
This plugin gives a summary of access patterns grouped by "pages" and
showing read/write patterns by vCPUS.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 2019-10-28 15:12:38 +00:00
Alex Bennée f79e8fa3b7 tests/plugin: add instruction execution breakdown 
This gives a break down of instruction classes and individual
instruction types.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 2019-10-28 15:12:38 +00:00
Alex Bennée a208ba09bd tests/plugin: add a hotblocks plugin 
This is a simple plugin to track which translation blocks are call
most often. As we don't have a view of the internals of TCG we can
only work by the address of the start of the block so we also need to
tracks how often the address is translated.

As there will be multiple blocks starting at the same address. We can
try and work around this by futzing the value to feed to the hash with
the insn count.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 2019-10-28 15:12:38 +00:00
Emilio G. Cota 671f760b93 tests/plugin: add sample plugins 
Pass arguments with -plugin=libfoo.so,arg=bar,arg=baz

Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
 2019-10-28 15:12:38 +00:00