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[llvm-ifs][IFS] llvm Interface Stubs merging + object file generation tool.
This tool merges interface stub files to produce a merged interface stub file or a stub library. Currently it for stub library generation it can produce an ELF .so stub file, or a TBD file (experimental). It will be used by the clang -emit-interface-stubs compilation pipeline to merge and assemble the per-CU stub files into a stub library. The new IFS format is as follows: --- !experimental-ifs-v1 IfsVersion: 1.0 Triple: <llvm triple> ObjectFileFormat: <ELF | TBD> Symbols: _ZSymbolName: { Type: <type>, etc... } ... Differential Revision: https://reviews.llvm.org/D66405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370499 91177308-0d34-0410-b5e6-96231b3b80d8
1 parent a3c7b08 commit acdc608

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‎test/CMakeLists.txt‎

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@@ -69,6 +69,7 @@ set(LLVM_TEST_DEPENDS
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llvm-exegesis
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llvm-extract
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llvm-isel-fuzzer
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llvm-ifs
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llvm-jitlink
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llvm-lib
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llvm-link

‎test/lit.cfg.py‎

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@@ -142,7 +142,7 @@ def get_asan_rtlib():
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'dsymutil', 'lli', 'lli-child-target', 'llvm-ar', 'llvm-as',
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'llvm-bcanalyzer', 'llvm-config', 'llvm-cov', 'llvm-cxxdump', 'llvm-cvtres',
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'llvm-diff', 'llvm-dis', 'llvm-dwarfdump', 'llvm-exegesis', 'llvm-extract',
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'llvm-isel-fuzzer', 'llvm-jitlink', 'llvm-opt-fuzzer', 'llvm-lib',
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'llvm-isel-fuzzer', 'llvm-ifs', 'llvm-jitlink', 'llvm-opt-fuzzer', 'llvm-lib',
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'llvm-link', 'llvm-lto', 'llvm-lto2', 'llvm-mc', 'llvm-mca',
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'llvm-modextract', 'llvm-nm', 'llvm-objcopy', 'llvm-objdump',
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'llvm-pdbutil', 'llvm-profdata', 'llvm-ranlib', 'llvm-rc', 'llvm-readelf',

‎test/tools/llvm-ifs/conflict-header-format.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/object.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# CHECK-IFS: error: Interface Stub: ObjectFileFormat Mismatch.
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# CHECK-IFS-NEXT: Filenames:
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# CHECK-IFS-NEXT: ObjectFileFormat Values: TBD ELF
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-apple-unknown
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ObjectFileFormat: TBD
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Symbols:
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a: { Type: Func }
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...

‎test/tools/llvm-ifs/conflict-header-triple.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/object.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# CHECK-IFS: error: Interface Stub: Triple Mismatch.
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# CHECK-IFS-NEXT: Filenames:
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# CHECK-IFS-NEXT: Triple Values: mips-unknown-linux x86_64-unknown-linux-gnu
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: mips-unknown-linux
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ObjectFileFormat: ELF
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Symbols:
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a: { Type: Func }
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...

‎test/tools/llvm-ifs/conflict-header-version.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/object.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# RUN: not llvm-ifs -action write-ifs -o - %s 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS2
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# CHECK-IFS: error: Interface Stub: IfsVersion Mismatch.
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# CHECK-IFS2: error: Interface Stub: Bad IfsVersion: 0.0, llvm-ifs supported version: 1.2.
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--- !experimental-ifs-v1
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IfsVersion: 0.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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a: { Type: Func }
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...

‎test/tools/llvm-ifs/conflict-size.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/object.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# Here we are testing to see if two symbols with identical names will fail to
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# merge in conflict due to mismatching sizes.
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# CHECK-IFS: error: Interface Stub: Size Mismatch for b.
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# CHECK-IFS-NEXT: Filename:
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# CHECK-IFS-NEXT: Size Values: 1 4
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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b: { Type: Object, Size: 1 }
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...

‎test/tools/llvm-ifs/conflict-type.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/func.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# Here we are testing to see if two symbols with identical names will fail to
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# merge in conflict due to mismatched types.
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# CHECK-IFS: error: Interface Stub: Type Mismatch for a.
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# CHECK-IFS-NEXT: Filename:
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# CHECK-IFS-NEXT: Type Values: Object Func
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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a: { Type: Object, Size: 1 }
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...

‎test/tools/llvm-ifs/conflict-weak.ifs‎

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# RUN: not llvm-ifs -action write-ifs -o - %s %S/func.ifs 2>&1 | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# Here we are testing to see if two symbols with identical names will fail to
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# merge in conflict due to one being weak and one not. Eventually this will work
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# when llvm-ifs has support for resolving these kinds of conflicts.
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# CHECK-IFS: error: Interface Stub: Weak Mismatch for a.
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# CHECK-IFS-NEXT: Filename:
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# CHECK-IFS-NEXT: Weak Values: 1 0
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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a: { Type: Func, Weak: true }
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...

‎test/tools/llvm-ifs/func.ifs‎

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# RUN: llvm-ifs -action write-ifs -o - %s %S/object.ifs | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# RUN: llvm-ifs -action write-bin -o - %s %S/object.ifs | \
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# RUN: llvm-readelf --all | FileCheck %s --check-prefixes=CHECK-ELF
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# RUN: llvm-ifs -action write-bin -force-format TBD -o - %s %S/object.ifs | \
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# RUN: FileCheck %s --check-prefixes=CHECK-DARWIN-TBD3
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# RUN: llvm-ifs -action write-ifs -o - %s %s | \
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# RUN: FileCheck %s --check-prefixes=CHECK-MERGE-IFS
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# CHECK-IFS: --- !experimental-ifs-v1
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# CHECK-IFS-NEXT: IfsVersion: 1.0
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# CHECK-IFS-NEXT: Triple: x86_64-unknown-linux-gnu
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# CHECK-IFS-NEXT: ObjectFileFormat: ELF
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# CHECK-IFS-NEXT: Symbols:
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# CHECK-IFS-DAG: a: { Type: Func }
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# CHECK-IFS-DAG: b: { Type: Object, Size: 4 }
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# CHECK-IFS: ...
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# CHECK-ELF: ELF Header:
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# CHECK-ELF: Class: ELF64
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# CHECK-ELF: Type: DYN (Shared object file)
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# CHECK-ELF: FUNC GLOBAL DEFAULT 1 a
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# CHECK-ELF: OBJECT GLOBAL DEFAULT 1 b
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# CHECK-DARWIN-TBD3: --- !tapi-tbd-v3
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# CHECK-DARWIN-TBD3-NEXT: archs: [ x86_64 ]
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# CHECK-DARWIN-TBD3-NEXT: platform: macosx
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# CHECK-DARWIN-TBD3-NEXT: flags: [ flat_namespace, not_app_extension_safe ]
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# CHECK-DARWIN-TBD3-NEXT: install-name: ''
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# CHECK-DARWIN-TBD3-NEXT: current-version: 0
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# CHECK-DARWIN-TBD3-NEXT: compatibility-version: 0
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# CHECK-DARWIN-TBD3-NEXT: objc-constraint: none
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# CHECK-DARWIN-TBD3-NEXT: exports:
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# CHECK-DARWIN-TBD3-NEXT: - archs: [ x86_64 ]
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# CHECK-DARWIN-TBD3-NEXT: symbols: [ a, b ]
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# CHECK-DARWIN-TBD3-NEXT: ...
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# Here we are testing to see if two identical symbols will merge.
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# CHECK-MERGE-IFS: --- !experimental-ifs-v1
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# CHECK-MERGE-IFS-NEXT: IfsVersion: 1.0
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# CHECK-MERGE-IFS-NEXT: Triple: x86_64-unknown-linux-gnu
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# CHECK-MERGE-IFS-NEXT: ObjectFileFormat: ELF
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# CHECK-MERGE-IFS-NEXT: Symbols:
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# CHECK-MERGE-IFS-NEXT: a: { Type: Func }
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# CHECK-MERGE-IFS-NEXT: ...
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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a: { Type: Func }
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...

‎test/tools/llvm-ifs/object-function-size-weak-combo.ifs‎

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# RUN: llvm-ifs -action write-ifs -o - %s %S/func.ifs %S/object.ifs %S/weak.ifs | \
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# RUN: FileCheck %s --check-prefixes=CHECK-IFS
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# RUN: llvm-ifs -action write-bin -o - %s %S/func.ifs %S/object.ifs %S/weak.ifs | \
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# RUN: llvm-readelf --all | FileCheck %s --check-prefixes=CHECK-ELF
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# CHECK-IFS: --- !experimental-ifs-v1
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# CHECK-IFS-NEXT: IfsVersion: 1.0
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# CHECK-IFS-NEXT: Triple: x86_64-unknown-linux-gnu
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# CHECK-IFS-NEXT: ObjectFileFormat: ELF
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# CHECK-IFS-NEXT: Symbols:
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# CHECK-IFS-DAG: e: { Type: Object, Size: 8 }
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# CHECK-IFS-DAG: a: { Type: Func }
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# CHECK-IFS-DAG: f: { Type: Object, Size: 2 }
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# CHECK-IFS-DAG: _Z10strongFuncv: { Type: Func }
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# CHECK-IFS-DAG: _Z8weakFuncv: { Type: Func, Weak: true }
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# CHECK-IFS-DAG: b: { Type: Object, Size: 4 }
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# CHECK-IFS: ...
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# CHECK-ELF: FUNC GLOBAL DEFAULT 1 _Z10strongFuncv
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# CHECK-ELF: FUNC WEAK DEFAULT 1 _Z8weakFuncv
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# CHECK-ELF: FUNC GLOBAL DEFAULT 1 a
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# CHECK-ELF: OBJECT GLOBAL DEFAULT 1 b
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# CHECK-ELF: OBJECT GLOBAL DEFAULT 1 e
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# CHECK-ELF: OBJECT GLOBAL DEFAULT 1 f
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--- !experimental-ifs-v1
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IfsVersion: 1.0
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Triple: x86_64-unknown-linux-gnu
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ObjectFileFormat: ELF
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Symbols:
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e: { Type: Object, Size: 8 }
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f: { Type: Object, Size: 2 }
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...

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