1Test plain passthrough copying with llvm-objcopy, by checking that obj2yaml 2produces identical output for both input and output object files/executables. 3(Intentionally not comparing to the original input yaml, in case there are 4superficial differences like line endings.) In order to have a check of the 5whole file and not just individual fields with FileCheck, checking with 6obj2yaml+cmp instead of llvm-readobj+cmp, as llvm-readobj also prints file 7details that can differ between otherwise equal files (such as file offsets). 8 9Actual copied object files/executables can differ in, among others, the 10following aspects: 11- The padding of executable sections (lld uses 0xcc, which is int3 on x86) 12- The actual layout of the string table (it can be filled linearly, 13 strings can be dedupliated, the table can be optimized by sharing tails 14 of longer strings; different parts in llvm do each of these three options) 15- The size indication for an empty/missing string table can either be 4 16 or left out altogether 17- Alignment of section data 18- Checksums 19 20RUN: yaml2obj %p/Inputs/i386-obj.yaml -o %t.i386.o 21RUN: llvm-objcopy %t.i386.o %t.i386-copy.o 22RUN: obj2yaml %t.i386.o > %t.i386.o.yaml 23RUN: obj2yaml %t.i386-copy.o > %t.i386-copy.o.yaml 24RUN: cmp %t.i386.o.yaml %t.i386-copy.o.yaml 25 26RUN: yaml2obj %p/Inputs/x86_64-obj.yaml -o %t.x86_64.o 27RUN: llvm-objcopy %t.x86_64.o %t.x86_64-copy.o 28RUN: obj2yaml %t.x86_64.o > %t.x86_64.o.yaml 29RUN: obj2yaml %t.x86_64-copy.o > %t.x86_64-copy.o.yaml 30RUN: cmp %t.x86_64.o.yaml %t.x86_64-copy.o.yaml 31 32RUN: yaml2obj %p/Inputs/i386-exe.yaml -o %t.i386.exe 33RUN: llvm-objcopy %t.i386.exe %t.i386-copy.exe 34RUN: obj2yaml %t.i386.exe > %t.i386.exe.yaml 35RUN: obj2yaml %t.i386-copy.exe > %t.i386-copy.exe.yaml 36RUN: cmp %t.i386.exe.yaml %t.i386-copy.exe.yaml 37 38RUN: yaml2obj %p/Inputs/x86_64-exe.yaml -o %t.x86_64.exe 39RUN: llvm-objcopy %t.x86_64.exe %t.x86_64-copy.exe 40RUN: obj2yaml %t.x86_64.exe > %t.x86_64.exe.yaml 41RUN: obj2yaml %t.x86_64-copy.exe > %t.x86_64-copy.exe.yaml 42RUN: cmp %t.x86_64.exe.yaml %t.x86_64-copy.exe.yaml 43 44RUN: yaml2obj %p/Inputs/no-symbols.yaml -o %t.no-symbols.o 45RUN: llvm-objcopy %t.no-symbols.o %t.no-symbols-copy.o 46RUN: obj2yaml %t.no-symbols.o > %t.no-symbols.o.yaml 47RUN: obj2yaml %t.no-symbols-copy.o > %t.no-symbols-copy.o.yaml 48RUN: cmp %t.no-symbols.o.yaml %t.no-symbols-copy.o.yaml 49