449f2ca146
`clang -gz=zstd a.o` passes this option to the linker. This option compresses output debug sections with zstd and sets ch_type to ELFCOMPRESS_ZSTD. As of today, very few DWARF consumers recognize ELFCOMPRESS_ZSTD. Use the llvm::zstd::compress API with level llvm::zstd::DefaultCompression (5), which we may tune after we have more experience with zstd output. zstd has built-in parallel compression support (so we don't need to do D117853 for zlib), which is not leveraged yet. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D133548
34 lines
1.2 KiB
ArmAsm
34 lines
1.2 KiB
ArmAsm
# REQUIRES: x86, zstd
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# RUN: llvm-mc -filetype=obj -triple=x86_64 --compress-debug-sections=zstd %s -o %t.o
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# RUN: ld.lld %t.o -o %t.so -shared
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# RUN: llvm-readelf -S -x .debug_str %t.so | FileCheck %s
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# CHECK: .debug_str PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 01 MS 0 0 1
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# CHECK: Hex dump of section '.debug_str':
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# CHECK-NEXT: 0x00000000 756e7369 676e6564 20696e74 00636861 unsigned int.cha
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# CHECK-NEXT: 0x00000010 7200756e 7369676e 65642063 68617200 r.unsigned char.
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# CHECK-NEXT: 0x00000020 73686f72 7420756e 7369676e 65642069 short unsigned i
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# CHECK-NEXT: 0x00000030 6e74006c 6f6e6720 756e7369 676e6564 nt.long unsigned
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# CHECK-NEXT: 0x00000040 20696e74 00 int.
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# RUN: ld.lld %t.o -o %t.so -shared --compress-debug-sections=zstd
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# RUN: llvm-readelf -S %t.so | FileCheck %s --check-prefix=OUTPUT-SEC
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# RUN: llvm-objcopy --decompress-debug-sections %t.so
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# RUN: llvm-readelf -S -x .debug_str %t.so | FileCheck %s
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# OUTPUT-SEC: .debug_str PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 01 MSC 0 0 1
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.section .debug_str,"MS",@progbits,1
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.LASF2:
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.string "short unsigned int"
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.LASF3:
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.string "unsigned int"
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.LASF0:
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.string "long unsigned int"
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.LASF8:
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.string "char"
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.LASF1:
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.string "unsigned char"
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