## Test the "--skip-line-zero" option. ## ## This test uses handcrafted assembly to produce the following line table: ## Address Line Column File ISA Discriminator OpIndex Flags ## ------------------ ------ ------ ------ --- ------------- ------- ------------- ## 0x0000000000001710 1 0 1 0 0 0 ## 0x0000000000001714 0 0 1 0 0 0 ## 0x0000000000001719 1 2 1 0 0 0 ## 0x000000000000171b 1 2 1 0 0 0 end_sequence ## 0x00000000000016c0 0 0 1 0 0 0 ## 0x00000000000016cf 2 0 1 0 0 0 ## 0x00000000000016d4 0 0 1 0 0 0 ## 0x00000000000016d9 0 0 1 0 0 0 ## 0x00000000000016df 0 0 1 0 0 0 end_sequence # REQUIRES: x86-registered-target # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o ## Check that without '--skip-line-zero', line zero is displayed for a line-table entry which has no source correspondence. # RUN: llvm-symbolizer --obj=%t.o -f=none 0x16d4 | FileCheck --strict-whitespace --match-full-lines --check-prefix=DISABLE %s # DISABLE:main.c:0:0 ## Check that the '--skip-line-zero' does not cross sequence boundaries. ## If it fails to find in the current sequence then line zero is returned for the queried address. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16c0 | FileCheck --strict-whitespace --match-full-lines --check-prefix=FAIL-ACROSS-SEQ %s # FAIL-ACROSS-SEQ:main.c:0:0 ## Check that with '--skip-line-zero', the last non-zero line in the current sequence is displayed. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=WITHIN-SEQ %s # WITHIN-SEQ:main.c:1:0 (approximate) ## Check that with '--skip-line-zero', multiple line zero rows are skipped within the current sequence. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16d9 | FileCheck --strict-whitespace --match-full-lines --check-prefix=MULTIPLE-ROWS %s # MULTIPLE-ROWS:main.c:2:0 (approximate) ## Check that '--skip-line-zero' only affects the line zero addresses when more than one address is specified. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16d4 0x1719 | FileCheck --strict-whitespace --match-full-lines --check-prefixes=ENABLE,NO-APPROX %s # ENABLE:main.c:2:0 (approximate) # NO-APPROX:main.c:1:2 ## Check to ensure that '--skip-line-zero' with '--verbose' enabled displays approximate flag in verbose ouptut. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero --verbose 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=VERBOSE %s # VERBOSE: Filename: main.c # VERBOSE-NEXT: Line: 1 # VERBOSE-NEXT: Column: 0 # VERBOSE-NEXT: Approximate: true ## Check to ensure that '--skip-line-zero' with '--output-style=JSON' displays approximate flag in JSON output. # RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero --output-style=JSON 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=JSON %s # JSON:[{"Address":"0x1717","ModuleName":"{{.*}}{{[/|\]+}}skip-line-zero.s{{.*}}","Symbol":[{"Approximate":true,"Column":0,"Discriminator":0,"FileName":"main.c","FunctionName":"","Line":1,"StartAddress":"","StartFileName":"","StartLine":0}]}] ## main.c ## __attribute__((section("def"))) int foo() { return 1234; } ## int main(void) { return foo()+5678; } ## ## Generated using ## clang -S -gdwarf-4 --target=x86_64-pc-linux -fdebug-prefix-map=/tmp="" main.c -o main.s ## ## Sections belonging to code segment(.text) are removed. Sections related to debug information(other than .debug_line) are modified. Section .debug_line is handwritten. Section .debug_str is deleted. .section .debug_abbrev,"",@progbits .byte 1 # Abbreviation Code .byte 17 # DW_TAG_compile_unit .byte 0 # DW_CHILDREN_no .byte 16 # DW_AT_stmt_list .byte 23 # DW_FORM_sec_offset .byte 17 # DW_AT_low_pc .byte 1 # DW_FORM_addr .byte 85 # DW_AT_ranges .byte 23 # DW_FORM_sec_offset .byte 0 # EOM(1) .byte 0 # EOM(2) .byte 0 # EOM(3) .section .debug_info,"",@progbits .Lcu_begin0: .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit .Ldebug_info_start0: .short 4 # DWARF version number .long .debug_abbrev # Offset Into Abbrev. Section .byte 8 # Address Size (in bytes) .byte 1 # Abbrev [1] 0xb:0x55 DW_TAG_compile_unit .long .Lline_table_start0 # DW_AT_stmt_list .quad 0 # DW_AT_low_pc .long .Ldebug_ranges0 # DW_AT_ranges .byte 0 # End Of Children Mark .Ldebug_info_end0: .section .debug_ranges,"",@progbits .Ldebug_ranges0: .quad 0x1710 #.Lfunc_begin0 .quad 0x171b #.Lfunc_end0 .quad 0x16c0 #.Lfunc_begin1 .quad 0x16df #.Lfunc_end1 .quad 0 .quad 0 .section .debug_line,"",@progbits .Lline_table_start0: .long .Lunit_end - .Lunit_start # unit length .Lunit_start: .short 4 # version .long .Lprologue_end - .Lprologue_start # header length .Lprologue_start: .byte 1 # minimum_instruction_length .byte 1 # maximum_operations_per_instruction .byte 0 # default_is_stmt .byte -5 # line_base .byte 14 # line_range .byte 13 # opcode_base .byte 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 # arguments in standard opcodes .byte 0 # end of include directories .asciz "main.c" # filename .byte 0 # directory index .byte 0 # modification time .byte 0 # length of file (unavailable) .byte 0 # end of filenames .Lprologue_end: .byte 0x00, 9, 2 # DW_LNE_set_address .quad 0x1710 # Address Value .byte 0x01 # DW_LNS_copy .byte 0x49 # (address += 4, line += -1, op-index += 0) .byte 0x05, 2 # DW_LNS_set_column (2) .byte 0x59 # (address += 5, line += 1, op-index += 0) .byte 0x02 # DW_LNS_advance_pc .uleb128 0x02 # (addr += 2, op-index += 0) .byte 0x00, 1, 1 # DW_LNE_end_sequence .byte 0x00, 9, 2 # DW_LNE_set_address .quad 0x16c0 # Address Value .byte 0x11 # (address += 0, line += -1, op-index += 0) .byte 0xe6 # (address += 15, line += 2, op-index += 0) .byte 0x56 # (address += 5, line += -2, op-index += 0) .byte 0x58 # (address += 5, line += 0, op-index += 0) .byte 0x02 # DW_LNS_advance_pc .uleb128 0x06 # (addr += 6, op-index += 0) .byte 0x00, 1, 1 # DW_LNE_end_sequence .Lunit_end: