b2702d6a45
Summary: When using llvm-objcopy -O binary and the resulting file will be empty (e.g. removing the only section that would be written, or using --only-keep with a section that doesn't exist/isn't SHF_ALLOC), we crash because FileOutputBuffer expects Size > 0. Add a regression test, and change Buffer to open/truncate the output file in this case. Reviewers: alexshap, jhenderson, jakehehrlich, espindola Reviewed By: alexshap, jhenderson Subscribers: jfb, llvm-commits, emaste, arichardson Differential Revision: https://reviews.llvm.org/D56806 llvm-svn: 352371
28 lines
792 B
Plaintext
28 lines
792 B
Plaintext
# RUN: yaml2obj %s -o %t.o
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# Writing an empty output to a non-existent file will still create it.
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# RUN: rm -f %t-new.txt
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# RUN: llvm-objcopy -R .text -O binary %t.o %t-new.txt
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# RUN: wc -c %t-new.txt | FileCheck %s
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# Writing an empty output to an existing file will truncate it.
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# RUN: echo abcd > %t-existing.txt
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# RUN: llvm-objcopy -R .text -O binary %t.o %t-existing.txt
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# RUN: wc -c %t-existing.txt | FileCheck %s
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# In both cases, the file should be empty.
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# CHECK: 0
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!ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
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Content: "c3c3c3c3"
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Size: 0x1000
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