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[ParseableInterface] Add ‘forwarding modules’

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A ‘forwarding module’ is a YAML file that’s meant to stand in for a .swiftmodule file and provide an up-to-date description of its dependencies, always using modification times.

When a ‘prebuilt module’ is first loaded, we verify that it’s up-to-date by hashing all of its dependencies. Since this is orders of magnitude slower than reading mtimes, we’ll install a `forwarding module` containing the mtimes of the now-validated dependencies.
This commit is contained in:
Harlan Haskins
2019-02-13 17:36:55 -08:00
parent 67a447f15f
commit 366bbf48b9
17 changed files with 1315 additions and 703 deletions
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15
test/ParseableInterface/ModuleCache/force-module-loading-mode.swift
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@@ -28,29 +28,44 @@
// 4. Both are present.
// RUN: cp %S/Inputs/force-module-loading-mode/Lib.swiftinterface %t
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-SERIALIZED %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-SERIALIZED %s
// RUN: %empty-directory(%t/MCP)
// (default)
// RUN: not %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP -I %t %s 2>&1 | %FileCheck -check-prefix=FROM-SERIALIZED %s
// RUN: %empty-directory(%t/MCP)
// 5. Both are present but the module is invalid.
// RUN: rm %t/Lib.swiftmodule && touch %t/Lib.swiftmodule
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=BAD-MODULE %s
// RUN: %empty-directory(%t/MCP)
// (default)
// RUN: not %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP -I %t %s 2>&1 | %FileCheck -check-prefix=BAD-MODULE %s
// RUN: %empty-directory(%t/MCP)
// 6. Both are present but the module can't be opened.
// RUN: chmod a-r %t/Lib.swiftmodule
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=prefer-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=NO-SUCH-MODULE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-parseable %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=FROM-INTERFACE %s
// RUN: %empty-directory(%t/MCP)
// RUN: not env SWIFT_FORCE_MODULE_LOADING=only-serialized %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP %s -I %t 2>&1 | %FileCheck -check-prefix=NO-SUCH-MODULE %s
// RUN: %empty-directory(%t/MCP)
// (default)
// RUN: not %target-swift-frontend -typecheck -parse-stdlib -module-cache-path %t/MCP -I %t %s 2>&1 | %FileCheck -check-prefix=NO-SUCH-MODULE %s
// RUN: %empty-directory(%t/MCP)
import Lib
// NO-SUCH-MODULE: [[@LINE-1]]:8: error: no such module 'Lib'