llvm.org GIT mirror llvm / master test / tools / llvm-readobj / elf-hash-histogram.test
master

Tree @master (Download .tar.gz)

elf-hash-histogram.test @masterraw · history · blame

# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/gnuhash.so.elf-ppc64 \
# RUN:   | FileCheck %s -check-prefix PPC64GNU
# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/gnuhash.so.elf-x86_64 \
# RUN:   | FileCheck %s -check-prefix X86GNU
# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/got-plt.exe.elf-mipsel \
# RUN:   | FileCheck %s -check-prefix SYSV

# PPC64GNU: Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
# PPC64GNU-NEXT:  Length  Number     % of total  Coverage
# PPC64GNU-NEXT:       0  1          ( 33.3%)       0.0%
# PPC64GNU-NEXT:       1  1          ( 33.3%)      25.0%
# PPC64GNU-NEXT:       2  0          (  0.0%)      25.0%
# PPC64GNU-NEXT:       3  1          ( 33.3%)     100.0%

# X86GNU: Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
# X86GNU-NEXT:  Length  Number     % of total  Coverage
# X86GNU-NEXT:       0  1          ( 33.3%)       0.0%
# X86GNU-NEXT:       1  1          ( 33.3%)      25.0%
# X86GNU-NEXT:       2  0          (  0.0%)      25.0%
# X86GNU-NEXT:       3  1          ( 33.3%)     100.0%

# SYSV: Histogram for bucket list length (total of 3 buckets)
# SYSV-NEXT:  Length  Number     % of total  Coverage
# SYSV-NEXT:       0  0          (  0.0%)       0.0%
# SYSV-NEXT:       1  0          (  0.0%)       0.0%
# SYSV-NEXT:       2  2          ( 66.7%)      57.1%
# SYSV-NEXT:       3  1          ( 33.3%)     100.0%

## Show that we report a warning for a hash table which contains an entry of
## the bucket array pointing to a cycle.

# RUN: yaml2obj %s -o %t.o
# RUN: llvm-readelf --elf-hash-histogram 2>&1 %t.o | FileCheck -DFILE=%t.o %s --check-prefix BROKEN

# BROKEN:       warning: '[[FILE]]': .hash section is invalid: bucket 1: a cycle was detected in the linked chain
# BROKEN:       Histogram for bucket list length (total of 1 buckets)
# BROKEN-NEXT:  Length  Number     % of total  Coverage
# BROKEN-NEXT:       0  0          (  0.0%)       0.0%
# BROKEN-NEXT:       1  1          (100.0%)     100.0%

--- !ELF
FileHeader:
  Class:   ELFCLASS32
  Data:    ELFDATA2LSB
  Type:    ET_REL
  Machine: EM_386
Sections:
  - Name:   .hash
    Type:   SHT_HASH
    Link:   .dynsym
    Bucket: [ 1 ]
    Chain:  [ 0, 1 ]
  - Name:  .dynamic
    Type:  SHT_DYNAMIC
    Flags: [ SHF_ALLOC ]
    Entries:
## llvm-readelf will read the hash table from the file offset
## p_offset + (p_vaddr - DT_HASH) = p_offset + (0 - 0) = p_offset,
## which is the start of PT_LOAD, i.e. the file offset of .hash.
      - Tag:   DT_HASH
        Value: 0x0
      - Tag:   DT_NULL
        Value: 0
DynamicSymbols:
  - Name: foo
ProgramHeaders:
  - Type:  PT_LOAD
    Sections:
      - Section: .hash
      - Section: .dynamic