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[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
# Chronos Test Suite
# (c) Copyright 2020-Present
# Status Research & Development GmbH
#
# Licensed under either of
# Apache License, version 2.0, (LICENSE-APACHEv2)
# MIT license (LICENSE-MIT)
exception tracking (#166) * exception tracking This PR adds minimal exception tracking to chronos, moving the goalpost one step further. In particular, it becomes invalid to raise exceptions from `callSoon` callbacks: this is critical for writing correct error handling because there's no reasonable way that a user of chronos can possibly _reason_ about exceptions coming out of there: the event loop will be in an indeterminite state when the loop is executing an _random_ callback. As expected, there are several issues in the error handling of chronos: in particular, it will end up in an inconsistent internal state whenever the selector loop operations fail, because the internal state update functions are not written in an exception-safe way. This PR turns this into a Defect, which probably is not the optimal way of handling things - expect more work to be done here. Some API have no way of reporting back errors to callers - for example, when something fails in the accept loop, there's not much it can do, and no way to report it back to the user of the API - this has been fixed with the new accept flow - the old one should be deprecated. Finally, there is information loss in the API: in composite operations like `poll` and `waitFor` there's no way to differentiate internal errors from user-level errors originating from callbacks. * store `CatchableError` in future * annotate proc's with correct raises information * `selectors2` to avoid non-CatchableError IOSelectorsException * `$` should never raise * remove unnecessary gcsafe annotations * fix exceptions leaking out of timer waits * fix some imports * functions must signal raising the union of all exceptions across all platforms to enable cross-platform code * switch to unittest2 * add `selectors2` which supercedes the std library version and fixes several exception handling issues in there * fixes * docs, platform-independent eh specifiers for some functions * add feature flag for strict exception mode also bump version to 3.0.0 - _most_ existing code should be compatible with this version of exception handling but some things might need fixing - callbacks, existing raises specifications etc. * fix AsyncCheck for non-void T
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import unittest2
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
import ../chronos
when defined(nimHasUsed): {.used.}
suite "Asynchronous utilities test suite":
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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when defined(chronosFutureTracking):
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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proc getCount(): uint =
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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# This procedure counts number of Future[T] in double-linked list via list
# iteration.
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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var res = 0'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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for item in pendingFutures():
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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inc(res)
res
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
test "Future clean and leaks test":
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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when defined(chronosFutureTracking):
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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if pendingFuturesCount(WithoutFinished) == 0'u:
if pendingFuturesCount(OnlyFinished) > 0'u:
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
poll()
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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check pendingFuturesCount() == 0'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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else:
echo dumpPendingFutures()
check false
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
else:
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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skip()
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
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test "FutureList basics test":
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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when defined(chronosFutureTracking):
var fut1 = newFuture[void]()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
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getCount() == 1'u
pendingFuturesCount() == 1'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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var fut2 = newFuture[void]()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 2'u
pendingFuturesCount() == 2'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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var fut3 = newFuture[void]()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 3'u
pendingFuturesCount() == 3'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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fut1.complete()
poll()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 2'u
pendingFuturesCount() == 2'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
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fut2.fail(newException(ValueError, ""))
poll()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 1'u
pendingFuturesCount() == 1'u
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
fut3.cancel()
poll()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 0'u64
pendingFuturesCount() == 0'u64
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
else:
skip()
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
test "FutureList async procedure test":
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
when defined(chronosFutureTracking):
proc simpleProc() {.async.} =
await sleepAsync(10.milliseconds)
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
var fut = simpleProc()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 2'u64
pendingFuturesCount() == 2'u64
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
waitFor fut
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 1'u64
pendingFuturesCount() == 1'u64
[WIP] Zero-cost unattended Future[T] tracking mechanism. (#106) * Zero-cost unattended Future[T] tracking mechanism with tests and tracking of test suite.
2020-07-06 06:33:13 +00:00
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
poll()
check:
Change Future identifier type from `int` to `uint`. (#228) * Change Future identifier type from `int` to `uint64`. * Fix compilation error and tests. * Add integer overflow test, to avoid confusion with next Nim versions, we expect that unsigned integers do not raise any exceptions if overflow happens. * Switch from `uint64` to `uint` type. * Add `uint` overflow tests.
2021-10-21 14:22:11 +00:00
getCount() == 0'u64
pendingFuturesCount() == 0'u64
Make Future tracking and stack traces optional (#108) * Make Future tracking optional via -d:chronosDutureTracking compilation flag. * Stack traces is now optional, use -d:chronosStackTraces. * Fix mistypes and add test for chronosStackTrace option.
2020-07-08 16:48:01 +00:00
else:
skip()