103eb0f9bc
Defer edge creation.
Don't create edges until the count is known to avoid repeated allocate+
copy operatios.
Limit resolutions.
Allow only a single resolution condition set per target, and overwrite
intermediate results. Reduces memory and obviates allocations.
Propagate fewer conditions.
Instead of propagating notice conditions to parents in graph during
initial resolve, leave them on leaf node, and attach to ancestors in
the final walk. Reduces copies.
Parallelize resolutions.
Use goroutines, mutexes, and waitgroups to resolve branches of the
graph in parallel. Makes better use of available cores.
Don't accumulate resolutions inside non-containers.
During the final resolution walk, only attach actions to ancestors from
the root down until the 1st non-aggregate. Prevents an explosion of
copies in the lower levels of the graph.
Drop origin for scale.
Tracking the origin of every potential origin for every restricted
condition does not scale. By dropping origin, propagating from top
to bottom can prune many redundant paths avoiding an exponential
explosion.
Conditions as bitmask.
Use bit masks for license conditions and condition sets. Reduces maps
and allocations.
Bug: 68860345
Bug: 151177513
Bug: 151953481
Test: m all
Test: m systemlicense
Test: m listshare; out/soong/host/linux-x86/bin/listshare ...
Test: m checkshare; out/soong/host/linux-x86/bin/checkshare ...
Test: m dumpgraph; out/soong/host/linux-x86/dumpgraph ...
Test: m dumpresolutions; out/soong/host/linux-x86/dumpresolutions ...
where ... is the path to the .meta_lic file for the system image. In my
case if
$ export PRODUCT=$(realpath $ANDROID_PRODUCT_OUT --relative-to=$PWD)
... can be expressed as:
${PRODUCT}/gen/META/lic_intermediates/${PRODUCT}/system.img.meta_lic
Change-Id: Ia2ec1b818de6122c239fbd0824754f1d65daffd3
103 lines
3.7 KiB
Go
103 lines
3.7 KiB
Go
// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package compliance
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import (
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"fmt"
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)
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// LicenseCondition identifies a recognized license condition by setting the
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// corresponding bit.
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type LicenseCondition uint16
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// LicenseConditionMask is a bitmask for the recognized license conditions.
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const LicenseConditionMask = LicenseCondition(0x3ff)
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const (
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// UnencumberedCondition identifies public domain or public domain-
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// like license that disclaims copyright.
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UnencumberedCondition = LicenseCondition(0x0001)
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// PermissiveCondition identifies a license without notice or other
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// significant requirements.
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PermissiveCondition = LicenseCondition(0x0002)
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// NoticeCondition identifies a typical open-source license with only
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// notice or attribution requirements.
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NoticeCondition = LicenseCondition(0x0004)
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// ReciprocalCondition identifies a license with requirement to share
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// the module's source only.
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ReciprocalCondition = LicenseCondition(0x0008)
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// RestrictedCondition identifies a license with requirement to share
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// all source code linked to the module's source.
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RestrictedCondition = LicenseCondition(0x0010)
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// RestrictedClasspathExceptionCondition identifies RestrictedCondition
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// waived for dynamic linking from independent modules.
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RestrictedClasspathExceptionCondition = LicenseCondition(0x0020)
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// WeaklyRestrictedCondition identifies a RestrictedCondition waived
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// for dynamic linking.
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WeaklyRestrictedCondition = LicenseCondition(0x0040)
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// ProprietaryCondition identifies a license with source privacy
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// requirements.
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ProprietaryCondition = LicenseCondition(0x0080)
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// ByExceptionOnly identifies a license where policy requires product
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// counsel review prior to use.
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ByExceptionOnlyCondition = LicenseCondition(0x0100)
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// NotAllowedCondition identifies a license with onerous conditions
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// where policy prohibits use.
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NotAllowedCondition = LicenseCondition(0x0200)
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)
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var (
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// RecognizedConditionNames maps condition strings to LicenseCondition.
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RecognizedConditionNames = map[string]LicenseCondition{
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"unencumbered": UnencumberedCondition,
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"permissive": PermissiveCondition,
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"notice": NoticeCondition,
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"reciprocal": ReciprocalCondition,
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"restricted": RestrictedCondition,
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"restricted_with_classpath_exception": RestrictedClasspathExceptionCondition,
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"restricted_allows_dynamic_linking": WeaklyRestrictedCondition,
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"proprietary": ProprietaryCondition,
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"by_exception_only": ByExceptionOnlyCondition,
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"not_allowed": NotAllowedCondition,
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}
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)
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// Name returns the condition string corresponding to the LicenseCondition.
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func (lc LicenseCondition) Name() string {
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switch lc {
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case UnencumberedCondition:
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return "unencumbered"
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case PermissiveCondition:
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return "permissive"
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case NoticeCondition:
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return "notice"
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case ReciprocalCondition:
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return "reciprocal"
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case RestrictedCondition:
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return "restricted"
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case RestrictedClasspathExceptionCondition:
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return "restricted_with_classpath_exception"
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case WeaklyRestrictedCondition:
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return "restricted_allows_dynamic_linking"
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case ProprietaryCondition:
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return "proprietary"
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case ByExceptionOnlyCondition:
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return "by_exception_only"
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case NotAllowedCondition:
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return "not_allowed"
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}
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panic(fmt.Errorf("unrecognized license condition: %04x", lc))
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}
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