96 lines
2.8 KiB
Plaintext
96 lines
2.8 KiB
Plaintext
## Here we test the --elf-hash-histogram command line option.
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## This test case checks how we built a histogram for a GNU hash section.
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## We check both 32-bit and 64-bit inputs.
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# RUN: yaml2obj --docnum=1 -D BITS=32 %s -o %t1-32.o
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# RUN: llvm-readelf --elf-hash-histogram %t1-32.o | FileCheck %s --check-prefix=GNU-HASH
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# RUN: yaml2obj --docnum=1 -D BITS=64 %s -o %t1-64.o
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# RUN: llvm-readelf --elf-hash-histogram %t1-64.o | FileCheck %s --check-prefix=GNU-HASH
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# GNU-HASH: Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
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# GNU-HASH-NEXT: Length Number % of total Coverage
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# GNU-HASH-NEXT: 0 1 ( 33.3%) 0.0%
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# GNU-HASH-NEXT: 1 1 ( 33.3%) 25.0%
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# GNU-HASH-NEXT: 2 0 ( 0.0%) 25.0%
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# GNU-HASH-NEXT: 3 1 ( 33.3%) 100.0%
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--- !ELF
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FileHeader:
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Class: ELFCLASS[[BITS]]
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Data: ELFDATA2LSB
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Type: ET_DYN
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Machine: EM_386
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: 0x1
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Shift2: 0x0
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BloomFilter: [ 0x0 ]
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HashBuckets: [ 0x00000001, 0x00000004, 0x00000000 ]
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HashValues: [ 0x0B887388, 0xECD54542, 0x7C92E3BB, 0x1C5871D9 ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_WRITE, SHF_ALLOC ]
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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DynamicSymbols:
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- Name: a
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- Name: b
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- Name: c
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- Name: d
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ProgramHeaders:
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- Type: PT_LOAD
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Sections:
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- Section: .gnu.hash
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- Section: .dynamic
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## Show that we report a warning for a hash table which contains an entry of
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## the bucket array pointing to a cycle.
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# RUN: yaml2obj --docnum=2 %s -o %t2.o
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# RUN: llvm-readelf --elf-hash-histogram 2>&1 %t2.o | FileCheck -DFILE=%t2.o %s --check-prefix=BROKEN
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# BROKEN: warning: '[[FILE]]': .hash section is invalid: bucket 1: a cycle was detected in the linked chain
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# BROKEN: Histogram for bucket list length (total of 1 buckets)
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# BROKEN-NEXT: Length Number % of total Coverage
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# BROKEN-NEXT: 0 0 ( 0.0%) 0.0%
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# BROKEN-NEXT: 1 1 (100.0%) 100.0%
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--- !ELF
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_386
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Sections:
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- Name: .hash
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Type: SHT_HASH
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Link: .dynsym
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Bucket: [ 1 ]
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Chain: [ 0, 1 ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Entries:
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## llvm-readelf will read the hash table from the file offset
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## p_offset + (p_vaddr - DT_HASH) = p_offset + (0 - 0) = p_offset,
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## which is the start of PT_LOAD, i.e. the file offset of .hash.
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- Tag: DT_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0
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DynamicSymbols:
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- Name: foo
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ProgramHeaders:
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- Type: PT_LOAD
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Sections:
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- Section: .hash
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- Section: .dynamic
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