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2022-02-09tests/plugins: add instruction matching to libinsn.soAlex Bennée1-1/+88
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>
2022-02-09tests/plugin: allow libinsn.so per-CPU countsAlex Bennée1-8/+31
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>
2021-11-29tests/plugin/syscall.c: fix compiler warningsJuro Bystricky1-5/+3
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>
2021-11-04tests/plugins: extend the insn plugin to track opcode sizesAlex Bennée1-2/+35
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>
2021-09-02tests/plugins/syscalls: adhere to new arg-passing schemeMahmoud Mandour1-7/+16
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>
2021-09-02tests/plugins/mem: introduce "track" arg and make args not positionalMahmoud Mandour1-18/+29
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>
2021-09-02tests/plugins/insn: made arg inline not positional and parse it as boolMahmoud Mandour1-2/+12
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>
2021-09-02tests/plugins/bb: adapt to the new arg passing schemeMahmoud Mandour1-4/+11
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>
2021-05-25plugins/syscall: Added a table-like summary outputMahmoud Mandour1-5/+93
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>
2021-03-17plugins: new syscalls pluginMatthias Weckbecker2-1/+50
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>
2021-02-18tests/plugin: allow memory plugin to do both inline and callbacksAlex Bennée1-7/+20
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>
2021-02-18tests/plugin: expand insn test to detect duplicate instructionsAlex Bennée1-1/+11
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>
2020-10-09plugin: Fixes compiling errors on msys2/mingwYonggang Luo1-2/+2
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>
2020-09-10plugins: move the more involved plugins to contribAlex Bennée5-1042/+2
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>
2020-08-21meson: convert sample pluginsPaolo Bonzini2-46/+7
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-15plugins: expand the bb plugin to be thread safe and track per-cpuAlex Bennée1-13/+84
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>
2020-07-15tests/plugins: don't unconditionally add -WpsabiAlex Bennée1-4/+18
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>
2020-06-18configure: Add -Wno-psabiRichard Henderson1-1/+1
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>
2020-06-16plugins: new lockstep plugin for debugging TCG changesAlex Bennée2-0/+341
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>
2020-06-08tests/plugin: correctly honour io_countAlex Bennée1-1/+1
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>
2020-02-25tests/plugins: make howvec clean-up after itself.Alex Bennée1-9/+17
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>
2020-02-25tests/plugin: prevent uninitialized warningChen Qun2-5/+4
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>
2019-11-12tcg plugins: expose an API version conceptAlex Bennée7-0/+14
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>
2019-10-28tests/plugin: add hotpages to analyse memory access patternsAlex Bennée2-0/+192
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>
2019-10-28tests/plugin: add instruction execution breakdownAlex Bennée2-0/+353
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>
2019-10-28tests/plugin: add a hotblocks pluginAlex Bennée2-0/+144
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>
2019-10-28tests/plugin: add sample pluginsEmilio G. Cota5-0/+280
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>
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