In chttp2: a pending but not yet sent goaway should block incoming
requests just like a sent one (we will sent that data momentarily!)
In the test:
- handle the case of the connection idle timeout happening before the
request arrives at the server
- disable retries, as these cause the request to get stuck (as we don't
have an additional server to retry on)
Fix b/287897932
---------
Co-authored-by: ctiller <ctiller@users.noreply.github.com>
We want writes to participate in event re-ordering, but it's unlikely
that we can sustain one byte per 500ms on all tests and keep them
passing (which is the degenerate case right now).
Tune write delays down to 50ms for the moment, though I expect we'll
want to talk about going lower.
omgwtfbbq
This test relies on WAIT_FOR_READY semantics, but we don't do that in
the proxy, so it got assigned the wrong suite.
Fix the suite, fix the flakes.
Also add some handy dandy logging to help figure this stuff out in the
future.
I can still make the old algorithm break and assign duplicate names on
my machine... make it a little more robust.
---------
Co-authored-by: ctiller <ctiller@users.noreply.github.com>
I've had local runs with a 10 second gap between creating the call and
issuing the first batch client side.
---------
Co-authored-by: ctiller <ctiller@users.noreply.github.com>
Fix fuzzer found bug b/286716972
Follows up on https://github.com/grpc/grpc/pull/33266 but gets the edge
case right of when there's a read queued before the peer closes - in
that case we weren't waking up the read.
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We should probably cap this so that our customers have a chance of
cloning the repository.
---------
Co-authored-by: ctiller <ctiller@users.noreply.github.com>
Here the recv message batch 103 was returning end of stream.
Per the reasoning in
https://github.com/grpc/proposal/blob/master/L104-core-ban-recv-with-send-status.md
Sending status is the final thing for a call on the server, so requiring
a recv message to complete when we've sent status is getting into at
best a gray area in out spec.
Add a strict ordering between that recv and the sending of status to
make a more deterministic test.
fixes b/286708835, b/286727273
- Switched from yapf to black
- Reconfigure isort for black
- Resolve black/pylint idiosyncrasies
Note: I used `--experimental-string-processing` because black was
producing "implicit string concatenation", similar to what described
here: https://github.com/psf/black/issues/1837. While currently this
feature is experimental, it will be enabled by default:
https://github.com/psf/black/issues/2188. After running black with the
new string processing so that the generated code merges these `"hello" "
world"` strings concatenations, then I removed
`--experimental-string-processing` for stability, and regenerated the
code again.
To the reviewer: don't even try to open "Files Changed" tab 😄 It's
better to review commit-by-commit, and ignore `run black and isort`.
Also drop a few deadlines so that tests can run faster (where that's
safe)
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This had been intended to be 500ms for the first round, but
inadvertently got bumped up during some last minute investigations.
Tune it back down, let things settle out, and then see whether we want
to increase it or not.
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When I converted these tests there was an intent to use gtest failures
to see past an unexpected event/no event received error - however that
doesn't work out because our tests rely on the prior events happening.
What we got instead was misattributed failures, folks chasing wild
theories on uninitialized data, dogs and cats living together, mass
hysteria.
Let's just crash and see if it makes diagnosis actually easier.
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Put enough internal delays into this test and it hits deadline
exceeded... extend the deadline to cover that.
(this is likely to become a common edit over the next few weeks...)
Use an index instead of a string to select tests (and use that index
module total test count to ensure whatever the fuzzer selects we always
run a test).
This will make the fuzzer corpus unstable when the test count changes,
which I think is fine - it'll regenerate.
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ChannelArgs fuzz configuration is expected to be used in other fuzzing
targets as well. This PR extracts the common code from the API fuzzer
and converts to use the C++ types.
Early out evaluating this function where we can, and use macros to
eliminate function calls in debug builds.
Takes per-example time from 5400ms to 1200ms in debug asan builds.
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Co-authored-by: ctiller <ctiller@users.noreply.github.com>
This metadata doesn't actually encode so passing it through from an app
will force a crash.
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Was leading to a nullptr deref, and we just don't need this one anymore.
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Avoids long path name problems on Windows
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Add a new binary that runs all core end2end tests in fuzzing mode.
In this mode FuzzingEventEngine is substituted for the default event
engine. This means that time is simulated, as is IO. The FEE gets
control of callback delays also.
In our tests the `Step()` function becomes, instead of a single call to
`completion_queue_next`, a series of calls to that function and
`FuzzingEventEngine::Tick`, driving forward the event loop until
progress can be made.
PR guide:
---
**New binaries**
`core_end2end_test_fuzzer` - the new fuzzer itself
`seed_end2end_corpus` - a tool that produces an interesting seed corpus
**Config changes for safe fuzzing**
The implementation tries to use the config fuzzing work we've previously
deployed in api_fuzzer to fuzz across experiments. Since some
experiments are far too experimental to be safe in such fuzzing (and
this will always be the case):
- a new flag is added to experiments to opt-out of this fuzzing
- a new hook is added to the config system to allow variables to
re-write their inputs before setting them during the fuzz
**Event manager/IO changes**
Changes are made to the event engine shims so that tcp_server_posix can
run with a non-FD carrying EventEngine. These are in my mind a bit
clunky, but they work and they're in code that we expect to delete in
the medium term, so I think overall the approach is good.
**Changes to time**
A small tweak is made to fix a bug initializing time for fuzzers in
time.cc - we were previously failing to initialize
`g_process_epoch_cycles`
**Changes to `Crash`**
A version that prints to stdio is added so that we can reliably print a
crash from the fuzzer.
**Changes to CqVerifier**
Hooks are added to allow the top level loop to hook the verification
functions with a function that steps time between CQ polls.
**Changes to end2end fixtures**
State machinery moves from the fixture to the test infra, to keep the
customizations for fuzzing or not in one place. This means that fixtures
are now just client/server factories, which is overall nice.
It did necessitate moving some bespoke machinery into
h2_ssl_cert_test.cc - this file is beginning to be problematic in
borrowing parts but not all of the e2e test machinery. Some future PR
needs to solve this.
A cq arg is added to the Make functions since the cq is now owned by the
test and not the fixture.
**Changes to test registration**
`TEST_P` is replaced by `CORE_END2END_TEST` and our own test registry is
used as a first depot for test information.
The gtest version of these tests: queries that registry to manually
register tests with gtest. This ultimately changes the name of our tests
again (I think for the last time) - the new names are shorter and more
readable, so I don't count this as a regression.
The fuzzer version of these tests: constructs a database of fuzzable
tests that it can consult to look up a particular suite/test/config
combination specified by the fuzzer to fuzz against. This gives us a
single fuzzer that can test all 3k-ish fuzzing ready tests and cross
polinate configuration between them.
**Changes to test config**
The zero size registry stuff was causing some problems with the event
engine feature macros, so instead I've removed those and used GTEST_SKIP
in the problematic tests. I think that's the approach we move towards in
the future.
**Which tests are included**
Configs that are compatible - those that do not do fd manipulation
directly (these are incompatible with FuzzingEventEngine), and those
that do not join threads on their shutdown path (as these are
incompatible with our cq wait methodology). Each we can talk about in
the future - fd manipulation would be a significant expansion of
FuzzingEventEngine, and is probably not worth it, however many uses of
background threads now should probably evolve to be EventEngine::Run
calls in the future, and then would be trivially enabled in the fuzzers.
Some tests currently fail in the fuzzing environment, a
`SKIP_IF_FUZZING` macro is used for these few to disable them if in the
fuzzing environment. We'll burn these down in the future.
**Changes to fuzzing_event_engine**
Changes are made to time: an exponential sweep forward is used now -
this catches small time precision things early, but makes decade long
timers (we have them) able to be used right now. In the future we'll
just skip time forward to the next scheduled timer, but that approach
doesn't yet work due to legacy timer system interactions.
Changes to port assignment: we ensure that ports are legal numbers
before assigning them via `grpc_pick_port_or_die`.
A race condition between time checking and io is fixed.
---------
Co-authored-by: ctiller <ctiller@users.noreply.github.com>
Reverts grpc/grpc#33002. Breaks internal builds:
`.../privacy_context:filters does not depend on a module exporting
'.../src/core/lib/channel/context.h'`
Change call attributes to be stored in a `ChunkedVector` instead of
`std::map<>`, so that the storage can be allocated on the arena. This
means that we're now doing a linear search instead of a map lookup, but
the total number of attributes is expected to be low enough that that
should be okay.
Also, we now hide the actual data structure inside of the
`ServiceConfigCallData` object, which required some changes to the
`ConfigSelector` API. Previously, the `ConfigSelector` would return a
`CallConfig` struct, and the client channel would then use the data in
that struct to populate the `ServiceConfigCallData`. This PR changes
that such that the client channel creates the `ServiceConfigCallData`
before invoking the `ConfigSelector`, and it passes the
`ServiceConfigCallData` into the `ConfigSelector` so that the
`ConfigSelector` can populate it directly.
- Added `fuzzer_input.proto` and `NetworkInput` proto message
- Migrated client_fuzzer and server_fuzzer to proto fuzzer
- Migrated the existing corpus and verified that the code coverage (e.g.
chttp2) stays the same
Probably need to cherrypick due to amount of files changed.
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Craig Tiller
Mark D. Roth
Sergii Tkachenko
AJ Heller
Vignesh Babu
Yijie Ma