| ## This test checks that looking up a zero hash in the .debug_cu_index hash |
| ## table works correctly when there's no CU with signature = 0. |
| ## |
| ## LLVM used to check just the signature bits to decide if the hash lookup ended |
| ## at a match or at an empty slot. This is wrong when signature = 0 because |
| ## empty slots have all zeros in the signature field too, and LLVM would return |
| ## the empty slot as a valid result. |
| |
| # REQUIRES: x86-registered-target |
| |
| # RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t --defsym MAIN=0 |
| # RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t.dwp |
| # RUN: llvm-symbolizer --obj=%t --dwp=%t.dwp 0x0 | FileCheck %s |
| |
| ## This expected output is very uninteresting, but it's better than a crash. |
| # CHECK: ??:0:0 |
| |
| .section .debug_abbrev,"",@progbits |
| .byte 1 # Abbreviation Code |
| .byte 17 # DW_TAG_compile_unit |
| .byte 0 # DW_CHILDREN_no |
| .ascii "\260B" # DW_AT_GNU_dwo_name |
| .byte 8 # DW_FORM_string |
| .ascii "\261B" # DW_AT_GNU_dwo_id |
| .byte 7 # DW_FORM_data8 |
| .ascii "\263B" # DW_AT_GNU_addr_base |
| .byte 23 # DW_FORM_sec_offset |
| .byte 85 # DW_AT_ranges |
| .byte 23 # DW_FORM_sec_offset |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 0 # EOM(3) |
| |
| ## Create two CUs, with dwo_ids 0 and 1 respectively. |
| .ifdef MAIN |
| .irpc I,01 |
| .data |
| A\I: |
| .long \I |
| |
| .text |
| F\I: |
| nop |
| |
| .section .debug_info,"",@progbits |
| .Lcu_begin\I: |
| .long .Ldebug_info_end\I-.Ldebug_info_start\I # Length of Unit |
| .Ldebug_info_start\I: |
| .short 4 # DWARF version number |
| .long .debug_abbrev # Offset Into Abbrev. Section |
| .byte 8 # Address Size (in bytes) |
| .byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit |
| .asciz "A.dwo" # DW_AT_GNU_dwo_name |
| .quad \I # DW_AT_GNU_dwo_id |
| .long .debug_addr # DW_AT_GNU_addr_base |
| .long .Lranges\I # DW_AT_ranges |
| .Ldebug_info_end\I: |
| |
| .section .debug_addr,"",@progbits |
| .quad A\I |
| .quad F\I |
| |
| .section .debug_ranges,"",@progbits |
| .Lranges\I: |
| .quad F\I |
| .quad F\I+1 |
| .quad 0 |
| .quad 0 |
| .endr |
| .else |
| ## Deliberately omit compile unit 0 in the DWP. We want to check the case where |
| ## a signature = 0 matches an empty hash slot in .debug_cu_index and the index |
| ## in the parallel table has to be checked. |
| .section .debug_abbrev.dwo,"e",@progbits |
| .Labbrev1: |
| .byte 1 # Abbreviation Code |
| .byte 17 # DW_TAG_compile_unit |
| .byte 0 # DW_CHILDREN_no |
| .byte 37 # DW_AT_producer |
| .byte 8 # DW_FORM_string |
| .byte 3 # DW_AT_name |
| .byte 8 # DW_FORM_string |
| .byte 0 # EOM(1) |
| .byte 0 # EOM(2) |
| .byte 0 # EOM(3) |
| .Labbrev_end1: |
| |
| .section .debug_info.dwo,"e",@progbits |
| .Lcu_begin1: |
| .long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit |
| .Ldebug_info_start1: |
| .short 4 # DWARF version number |
| .long 0 # Offset Into Abbrev. Section |
| .byte 8 # Address Size (in bytes) |
| .byte 1 # Abbrev DW_TAG_compile_unit |
| .asciz "Hand-written DWARF" # DW_AT_producer |
| .byte '1', '.', 'c', 0 # DW_AT_name |
| .Ldebug_info_end1: |
| |
| .section .debug_cu_index,"",@progbits |
| .long 2 # DWARF version number |
| .long 2 # Section count |
| .long 1 # Unit count |
| .long 8 # Slot count |
| |
| .quad 1, 0, 0, 0, 0, 0, 0, 0 # Hash table |
| .long 1, 0, 0, 0, 0, 0, 0, 0 # Index table |
| |
| .long 1 # DW_SECT_INFO |
| .long 3 # DW_SECT_ABBREV |
| |
| .long .Lcu_begin1-.debug_info.dwo |
| .long .Labbrev1-.debug_abbrev.dwo |
| |
| .long .Ldebug_info_end1-.Lcu_begin1 |
| .long .Labbrev_end1-.Labbrev1 |
| |
| .endif |
