| Commit message (Collapse) | Author | Age |
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With more specific information to be reported by Skyfunctions, e.g.,
to inform the build-event protocol on missing files, the EventHandler
interface is no longer enough. Therefore, provide an enriched context
for reporting events.
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Change-Id: I2d06166fe4d5b9054e24ad8c752fafc039e3f9f8
Reviewed-on: https://cr.bazel.build/8794
PiperOrigin-RevId: 148463437
MOS_MIGRATED_REVID=148463437
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This is required for a configuration transtion to set cpu. Without a
distinguisher, such a transition will lead to two identical configurations.
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PiperOrigin-RevId: 142603930
MOS_MIGRATED_REVID=142603930
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--experimental_dynamic_configs=notrim.
This is simply a matter of populating the "global" host
config from the target config instead of applying
the HostTransition patch.
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MOS_MIGRATED_REVID=139222963
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--experimental_dynamic_configs=notrim mode.
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MOS_MIGRATED_REVID=135126724
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The only place we now don't handle InterruptedException is in the action graph created after analysis, since I'm not sure that will be around for that much longer.
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MOS_MIGRATED_REVID=130327770
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It was not used (IIRC the last user was FdoSupport while it lived inside CppConfiguration)
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MOS_MIGRATED_REVID=124938836
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In the interleaved case, loading errors can occur during configuration creation
and we need to correctly report such errors in that case.
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MOS_MIGRATED_REVID=113826273
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options actually needed by the fragment. This protects against, e.g.,
unnecessarily duplicating CppConfiguration instances when only Java flags
change.
This is a recommit of ca1b21ac6d8a58041db822725b42de151b163dee which was
rolled back because it broke LIPO.
This change is particularly important for dynamic configurations, which may
mix and match fragments arbitrarily throughout a build. This not only has
performance implications, but also correctness implications: code that
expects two configured targets to have the same fragment (value) shouldn't
break just because the second CT's configuration is a trimmed version of the
first's.
The original change breaks FDO/LIPO because CppConfiguration can't be
shared across configurations. That's because it mutates state when
prepareHook() is called, and each configuration calls prepareHook. We
should ultimately solve this by refactoring the FDO/LIPO implementation
but don't want to block dynamic configuration progress on that. So this
change only enables trimming for dynamic configurations.
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MOS_MIGRATED_REVID=113570250
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*** Reason for rollback ***
Broke some alipo builds. I had to leave in the change to TransitiveTargetFunctionTest, which is relied upon by follow-up CLs.
*** Original change description ***
Pre-trim build options for all remaining calls to ConfigurationFragment.key. Move
the trimming logic into key() itself to:
a) eliminate code redundancy
b) guarantee all future calls to key() also do this.
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MOS_MIGRATED_REVID=109683849
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Move
the trimming logic into key() itself to:
a) eliminate code redundancy
b) guarantee all future calls to key() also do this.
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MOS_MIGRATED_REVID=107713353
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The headers were modified with
`find . -type f -exec 'sed' '-Ei' 's|Copyright 201([45]) Google|Copyright 201\1 The Bazel Authors|' '{}' ';'`
And manual edit for not Google owned copyright. Because of the nature of ijar, I did not modified the header of file owned by Alan Donovan.
The list of authors were extracted from the git log. It is missing older Google contributors that can be added on-demand.
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MOS_MIGRATED_REVID=103938715
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--
MOS_MIGRATED_REVID=102339394
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This is a big change, so let me walk you through the key pieces:
1) This cl provides an alternative mechanism for creating configurations and doing configuration transitions that's "dynamic" in that the configurations can be created on the fly and the transitions are arbitrary mappings from BuildOptions --> BuildOptions that can also be created on the fly. It also integrates this with ConfiguredTargetFunction, so the configured target graph automatically uses this framework.
2) It does *not* replace old-style (which we'll call "static") configurations. For a number of important reasons: It's not yet at feature parity (particularly: no LIPO). It's not remotely tested across real projects enough to have confidence that it's battle-ready. It doesn't yet handle certain "special" functions like BuildConfiguration.prepareToBuild() and BuildConfiguration.getRoots(). It still relies on the old static transition logic to determine what transitions to apply (eventually we'll distribute that logic out, but that's too much for a single cl). We need the option to toggle it on and off until we have enough confidence in it. So with this cl, builds can be done in either mode.
3) The new flag --experimental_dynamic_configs toggles use of dynamic configurations.
4) Dynamic configurations are created with the Skyframe function BuildConfigurationFunction (this was already created in an earlier change). This consumes a BuildOptions and a set of configuration fragments to produce a BuildConfiguration.
5) Dynamic transitions are instances of the new class PatchTransition, which simply maps an input BuildOptions to an output BuildOptions.
6) Since static and dynamic configurations have to co-exist (for now), this cl tries hard to keep today's transition logic defined in a single place (vs. forking a dedicated copy for each configuration style). This is done via the new interface BuildConfiguration.TransitionApplier. BuildConfiguration.evaluateTransition is modified to feed its transition logic into TransitionApplier's common API. Both dynamic and static configurations have their own implementations that "do the right thing" with the results.
7) The transition applier for dynamic configurations basically stores the Transition, then allows DependencyResolver (which calls BuildConfiguration.evaluateTransition) to return Dependency instances containing that Transition (vs. a BuildConfiguration, which they traditionally contain).
7.5) An earlier variation of the dynamic transition applier retained BuildOptions (e.g. when it got a Transition it immediately applied it to get its output BuildOptions, then stored that). This had the advantage of making composing of transitions easier, especially within BuildConfiguration.evaluateTransition (which can theoretically apply multiple transitions to the input configuration). But it turns out that applying transitions has a cost, and it's simply more performant to pass them through until they're really needed.
8) In dynamic configuration mode, after ConfiguredTargetFunction gets its deps (e.g. an <Attribute, Dependency> multimap), it "trims" the configurations for its dependencies by a) only including config fragments required by the deps' subtrees and b) applying the transitions that came from 7). This all happens in the new method ConfiguredTargetFunction.trimConfigurations.
9) trimConfigurations is heavily performance-optimized based on a lot of experience running this through a large project within Google. As it turns out, the cost of host transitions can be atrocious (because there are a lot of them). Also, BuildOptions.clone() is expensive. And just creating BuildConfiguration SkyKeys also has a cost (largely because of BuildOptions cloning), so that shouldn't be done except when really necessary. My experience with this convinced me it's worth making this method complicated for the sake of making it fast. Since it basically visits every edge in the configured target graph (at least), it really needs to be slick.
10) Since host transitions in particular are problematic w.r.t. speed, I compute the host *once* in ConfigurationCollectionFunction.getHostConfiguration() and expose that reference to ConfiguredTargetFunction and other Skyframe functions. This limits recomputation to just when the fragments are trimmed.
11) Since options cloning is expensive, I'm doing something scary: exposing a BuildConfiguration.getOptions() method that returns a direct reference. Since BuildOptions is mutable, this is dangerous in the wrong hands. I can experiment with going back to cloning (with the caching of host transitions it may not matter as much), but we may ultimately have to put up with this risk for the sake of performant analysis time. What would be *really* awesome would be to make BuildOptions immutable. But that's not going to happen in this cl.
So in short, the key abstractions in this cl are:
- PatchTransition
- BuildConfiguration.TransitionApplier
- ConfiguredTargetFunction.trimConfigurations
The current implementation imposes no analysis time penalty
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MOS_MIGRATED_REVID=101474620
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Creating the split configurations in Bazel uncovered an incrementality issue: ConfigurationFactory.hostConfigCache kept state between builds untracked by Skyframe, which is not good, and therefore had to be fixed.
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MOS_MIGRATED_REVID=97106917
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Dynamic configuration transitions require access to Skyframe (since they instantiate BuildConfigurations as Skyframe nodes). There are various places in Bazel where static transitions are done with no convenient Skyframe access. This cl shuffles host transitions, in particular, to places that are more amenable.
This change also assumes one host configuration per invocation. While this isn't strictly true (each target configuration can have its own host, and multiple target configurations are possible per build), we don't leverage that functionality in any meaningful way today. So until we have a proper interface for multiple host configurations, let's not block dynamic config progress on it.
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MOS_MIGRATED_REVID=97008479
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Instead of passing BuildConfigurationKey instances around, just pass in the
little data we actually need. This allows removing the BuildConfigurationKey
class.
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MOS_MIGRATED_REVID=91865340
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BuildConfiguration.Options.testEnvironment instead of special-casing it in a large number of classes.
The variables in the client environment are read in BlazeRuntime#beforeCommand() now.
Note that this entails a slight loss of caching: before, "--test_env=a=A,b=B" and "--test_env=b=B,a=A" were equivalent, now they are not, since instead of comparing Map<String, String>, List<Map.Entry<String,String>> instances are compared.
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MOS_MIGRATED_REVID=91570828
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computing the test environment as early as possible, and passing that along.
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MOS_MIGRATED_REVID=91388451
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--
MOE_MIGRATED_REVID=85702957
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Klaus Aehlig
Cal Peyser
Greg Estren
Janak Ramakrishnan
Lukacs Berki
Ulf Adams
Damien Martin-Guillerez
Marian Lobur
Han-Wen Nienhuys