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Merge pull request #243 from xushiwei/q
github.com/goplus/llgo/internal/packages; prog.TypeSizes: todo
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package packages | ||
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| import ( | ||
| "fmt" | ||
| "go/types" | ||
| "runtime" | ||
| "sync" | ||
| "unsafe" | ||
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| "golang.org/x/tools/go/packages" | ||
| ) | ||
|
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| // A LoadMode controls the amount of detail to return when loading. | ||
| // The bits below can be combined to specify which fields should be | ||
| // filled in the result packages. | ||
| // The zero value is a special case, equivalent to combining | ||
| // the NeedName, NeedFiles, and NeedCompiledGoFiles bits. | ||
| // ID and Errors (if present) will always be filled. | ||
| // Load may return more information than requested. | ||
| type LoadMode = packages.LoadMode | ||
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| const ( | ||
| NeedName = packages.NeedName | ||
| NeedFiles = packages.NeedFiles | ||
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| NeedSyntax = packages.NeedSyntax | ||
| NeedImports = packages.NeedImports | ||
| NeedDeps = packages.NeedDeps | ||
| NeedModule = packages.NeedModule | ||
| NeedExportFile = packages.NeedExportFile | ||
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| NeedCompiledGoFiles = packages.NeedCompiledGoFiles | ||
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| NeedTypes = packages.NeedTypes | ||
| NeedTypesSizes = packages.NeedTypesSizes | ||
| NeedTypesInfo = packages.NeedTypesInfo | ||
| ) | ||
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| // A Config specifies details about how packages should be loaded. | ||
| // The zero value is a valid configuration. | ||
| // Calls to Load do not modify this struct. | ||
| type Config = packages.Config | ||
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| // A Package describes a loaded Go package. | ||
| type Package = packages.Package | ||
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| // loader holds the working state of a single call to load. | ||
| type loader struct { | ||
| pkgs map[string]unsafe.Pointer | ||
| Config | ||
| sizes types.Sizes // non-nil if needed by mode | ||
| parseCache map[string]unsafe.Pointer | ||
| parseCacheMu sync.Mutex | ||
| exportMu sync.Mutex // enforces mutual exclusion of exportdata operations | ||
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| // Config.Mode contains the implied mode (see impliedLoadMode). | ||
| // Implied mode contains all the fields we need the data for. | ||
| // In requestedMode there are the actually requested fields. | ||
| // We'll zero them out before returning packages to the user. | ||
| // This makes it easier for us to get the conditions where | ||
| // we need certain modes right. | ||
| requestedMode LoadMode | ||
| } | ||
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| //go:linkname newLoader golang.org/x/tools/go/packages.newLoader | ||
| func newLoader(cfg *Config) *loader | ||
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| //go:linkname defaultDriver golang.org/x/tools/go/packages.defaultDriver | ||
| func defaultDriver(cfg *Config, patterns ...string) (*packages.DriverResponse, bool, error) | ||
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| //go:linkname refine golang.org/x/tools/go/packages.(*loader).refine | ||
| func refine(ld *loader, response *packages.DriverResponse) ([]*Package, error) | ||
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| // LoadEx loads and returns the Go packages named by the given patterns. | ||
| // | ||
| // Config specifies loading options; | ||
| // nil behaves the same as an empty Config. | ||
| // | ||
| // If any of the patterns was invalid as defined by the | ||
| // underlying build system, Load returns an error. | ||
| // It may return an empty list of packages without an error, | ||
| // for instance for an empty expansion of a valid wildcard. | ||
| // Errors associated with a particular package are recorded in the | ||
| // corresponding Package's Errors list, and do not cause Load to | ||
| // return an error. Clients may need to handle such errors before | ||
| // proceeding with further analysis. The PrintErrors function is | ||
| // provided for convenient display of all errors. | ||
| func LoadEx(sizes types.Sizes, cfg *Config, patterns ...string) ([]*Package, error) { | ||
| ld := newLoader(cfg) | ||
| response, external, err := defaultDriver(&ld.Config, patterns...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if sizes == nil { | ||
| sizes = types.SizesFor(response.Compiler, response.Arch) | ||
| } | ||
| ld.sizes = sizes | ||
| if ld.sizes == nil && ld.Config.Mode&(NeedTypes|NeedTypesSizes|NeedTypesInfo) != 0 { | ||
| // Type size information is needed but unavailable. | ||
| if external { | ||
| // An external driver may fail to populate the Compiler/GOARCH fields, | ||
| // especially since they are relatively new (see #63700). | ||
| // Provide a sensible fallback in this case. | ||
| ld.sizes = types.SizesFor("gc", runtime.GOARCH) | ||
| if ld.sizes == nil { // gccgo-only arch | ||
| ld.sizes = types.SizesFor("gc", "amd64") | ||
| } | ||
| } else { | ||
| // Go list should never fail to deliver accurate size information. | ||
| // Reject the whole Load since the error is the same for every package. | ||
| return nil, fmt.Errorf("can't determine type sizes for compiler %q on GOARCH %q", | ||
| response.Compiler, response.Arch) | ||
| } | ||
| } | ||
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| return refine(ld, response) | ||
| } | ||
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| // Visit visits all the packages in the import graph whose roots are | ||
| // pkgs, calling the optional pre function the first time each package | ||
| // is encountered (preorder), and the optional post function after a | ||
| // package's dependencies have been visited (postorder). | ||
| // The boolean result of pre(pkg) determines whether | ||
| // the imports of package pkg are visited. | ||
| // | ||
| //go:linkname Visit golang.org/x/tools/go/packages.Visit | ||
| func Visit(pkgs []*Package, pre func(*Package) bool, post func(*Package)) |
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