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clang-p2996/llvm/test/DebugInfo/XCOFF/function-sections.ll
Kyungwoo Lee 6747d44bda [DebugInfo] Fix end_sequence of debug_line in LTO Object 
In a LTO build, the `end_sequence` in debug_line table for each compile unit (CU) points the end of text section which merged all CUs. The `end_sequence` needs to point to the end of each CU's range. This bug often causes invalid `debug_line` table in the final `.dSYM` binary for MachO after running `dsymutil` which tries to compensate an out-of-range address of `end_sequence`.
The fix is to sync the line table termination with the range operations that are already maintained in DwarfDebug. When CU or section changes, or nodebug functions appear or module is finished, the prior pending line table is terminated using the last range label. In the MC path where no range is tracked, the old logic is conservatively used to end the line table using the section end symbol.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D108261
2021-11-14 20:19:47 -08:00

316 lines
18 KiB
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; RUN: llc -debugger-tune=gdb -mtriple powerpc-ibm-aix-xcoff -function-sections \
; RUN: < %s | FileCheck %s
source_filename = "1.c"
target datalayout = "E-m:a-p:32:32-i64:64-n32"
; Function Attrs: noinline nounwind optnone
define i32 @foo() #0 !dbg !8 {
entry:
ret i32 0, !dbg !12
}
; Function Attrs: noinline nounwind optnone
define i32 @bar() #0 !dbg !13 {
entry:
ret i32 1, !dbg !14
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
!1 = !DIFile(filename: "1.c", directory: "debug")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 3}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 13.0.0"}
!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !9, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{!11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !DILocation(line: 3, column: 3, scope: !8)
!13 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 6, type: !9, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!14 = !DILocation(line: 8, column: 3, scope: !13)
; CHECK: .csect .text[PR],2
; CHECK-NEXT: .file "1.c"
; CHECK-NEXT: .csect .foo[PR],2
; CHECK-NEXT: .globl foo[DS] # -- Begin function foo
; CHECK-NEXT: .globl .foo[PR]
; CHECK-NEXT: .align 2
; CHECK-NEXT: .csect foo[DS],2
; CHECK-NEXT: .vbyte 4, .foo[PR] # @foo
; CHECK-NEXT: .vbyte 4, TOC[TC0]
; CHECK-NEXT: .vbyte 4, 0
; CHECK-NEXT: .csect .foo[PR],2
; CHECK-NEXT: L..func_begin0:
; CHECK-NEXT: # %bb.0: # %entry
; CHECK-NEXT: L..tmp0:
; CHECK-NEXT: L..tmp1:
; CHECK-NEXT: li 3, 0
; CHECK-NEXT: blr
; CHECK-NEXT: L..tmp2:
; CHECK-NEXT: L..foo0:
; CHECK-NEXT: .vbyte 4, 0x00000000 # Traceback table begin
; CHECK-NEXT: .byte 0x00 # Version = 0
; CHECK-NEXT: .byte 0x09 # Language = CPlusPlus
; CHECK-NEXT: .byte 0x20 # -IsGlobaLinkage, -IsOutOfLineEpilogOrPrologue
; CHECK-NEXT: # +HasTraceBackTableOffset, -IsInternalProcedure
; CHECK-NEXT: # -HasControlledStorage, -IsTOCless
; CHECK-NEXT: # -IsFloatingPointPresent
; CHECK-NEXT: # -IsFloatingPointOperationLogOrAbortEnabled
; CHECK-NEXT: .byte 0x40 # -IsInterruptHandler, +IsFunctionNamePresent, -IsAllocaUsed
; CHECK-NEXT: # OnConditionDirective = 0, -IsCRSaved, -IsLRSaved
; CHECK-NEXT: .byte 0x80 # +IsBackChainStored, -IsFixup, NumOfFPRsSaved = 0
; CHECK-NEXT: .byte 0x00 # -HasExtensionTable, -HasVectorInfo, NumOfGPRsSaved = 0
; CHECK-NEXT: .byte 0x00 # NumberOfFixedParms = 0
; CHECK-NEXT: .byte 0x01 # NumberOfFPParms = 0, +HasParmsOnStack
; CHECK-NEXT: .vbyte 4, L..foo0-.foo[PR] # Function size
; CHECK-NEXT: .vbyte 2, 0x0003 # Function name len = 3
; CHECK-NEXT: .byte "foo" # Function Name
; CHECK-NEXT: L..func_end0:
; CHECK-NEXT: # -- End function
; CHECK-NEXT: .csect .bar[PR],2
; CHECK-NEXT: .globl bar[DS] # -- Begin function bar
; CHECK-NEXT: .globl .bar[PR]
; CHECK-NEXT: .align 2
; CHECK-NEXT: .csect bar[DS],2
; CHECK-NEXT: .vbyte 4, .bar[PR] # @bar
; CHECK-NEXT: .vbyte 4, TOC[TC0]
; CHECK-NEXT: .vbyte 4, 0
; CHECK-NEXT: .csect .bar[PR],2
; CHECK-NEXT: L..func_begin1:
; CHECK-NEXT: # %bb.0: # %entry
; CHECK-NEXT: L..tmp3:
; CHECK-NEXT: L..tmp4:
; CHECK-NEXT: li 3, 1
; CHECK-NEXT: blr
; CHECK-NEXT: L..tmp5:
; CHECK-NEXT: L..bar0:
; CHECK-NEXT: .vbyte 4, 0x00000000 # Traceback table begin
; CHECK-NEXT: .byte 0x00 # Version = 0
; CHECK-NEXT: .byte 0x09 # Language = CPlusPlus
; CHECK-NEXT: .byte 0x20 # -IsGlobaLinkage, -IsOutOfLineEpilogOrPrologue
; CHECK-NEXT: # +HasTraceBackTableOffset, -IsInternalProcedure
; CHECK-NEXT: # -HasControlledStorage, -IsTOCless
; CHECK-NEXT: # -IsFloatingPointPresent
; CHECK-NEXT: # -IsFloatingPointOperationLogOrAbortEnabled
; CHECK-NEXT: .byte 0x40 # -IsInterruptHandler, +IsFunctionNamePresent, -IsAllocaUsed
; CHECK-NEXT: # OnConditionDirective = 0, -IsCRSaved, -IsLRSaved
; CHECK-NEXT: .byte 0x80 # +IsBackChainStored, -IsFixup, NumOfFPRsSaved = 0
; CHECK-NEXT: .byte 0x00 # -HasExtensionTable, -HasVectorInfo, NumOfGPRsSaved = 0
; CHECK-NEXT: .byte 0x00 # NumberOfFixedParms = 0
; CHECK-NEXT: .byte 0x01 # NumberOfFPParms = 0, +HasParmsOnStack
; CHECK-NEXT: .vbyte 4, L..bar0-.bar[PR] # Function size
; CHECK-NEXT: .vbyte 2, 0x0003 # Function name len = 3
; CHECK-NEXT: .byte "bar" # Function Name
; CHECK-NEXT: L..func_end1:
; CHECK-NEXT: # -- End function
; CHECK-NEXT: L..sec_end0:
; CHECK: .dwsect 0x60000
; CHECK-NEXT: L...dwabrev:
; CHECK-NEXT: .byte 1 # Abbreviation Code
; CHECK-NEXT: .byte 17 # DW_TAG_compile_unit
; CHECK-NEXT: .byte 1 # DW_CHILDREN_yes
; CHECK-NEXT: .byte 37 # DW_AT_producer
; CHECK-NEXT: .byte 14 # DW_FORM_strp
; CHECK-NEXT: .byte 19 # DW_AT_language
; CHECK-NEXT: .byte 5 # DW_FORM_data2
; CHECK-NEXT: .byte 3 # DW_AT_name
; CHECK-NEXT: .byte 14 # DW_FORM_strp
; CHECK-NEXT: .byte 16 # DW_AT_stmt_list
; CHECK-NEXT: .byte 6 # DW_FORM_data4
; CHECK-NEXT: .byte 27 # DW_AT_comp_dir
; CHECK-NEXT: .byte 14 # DW_FORM_strp
; CHECK-NEXT: .byte 17 # DW_AT_low_pc
; CHECK-NEXT: .byte 1 # DW_FORM_addr
; CHECK-NEXT: .byte 85 # DW_AT_ranges
; CHECK-NEXT: .byte 6 # DW_FORM_data4
; CHECK-NEXT: .byte 0 # EOM(1)
; CHECK-NEXT: .byte 0 # EOM(2)
; CHECK-NEXT: .byte 2 # Abbreviation Code
; CHECK-NEXT: .byte 46 # DW_TAG_subprogram
; CHECK-NEXT: .byte 0 # DW_CHILDREN_no
; CHECK-NEXT: .byte 17 # DW_AT_low_pc
; CHECK-NEXT: .byte 1 # DW_FORM_addr
; CHECK-NEXT: .byte 18 # DW_AT_high_pc
; CHECK-NEXT: .byte 1 # DW_FORM_addr
; CHECK-NEXT: .byte 64 # DW_AT_frame_base
; CHECK-NEXT: .byte 10 # DW_FORM_block1
; CHECK-NEXT: .byte 3 # DW_AT_name
; CHECK-NEXT: .byte 14 # DW_FORM_strp
; CHECK-NEXT: .byte 58 # DW_AT_decl_file
; CHECK-NEXT: .byte 11 # DW_FORM_data1
; CHECK-NEXT: .byte 59 # DW_AT_decl_line
; CHECK-NEXT: .byte 11 # DW_FORM_data1
; CHECK-NEXT: .byte 39 # DW_AT_prototyped
; CHECK-NEXT: .byte 12 # DW_FORM_flag
; CHECK-NEXT: .byte 73 # DW_AT_type
; CHECK-NEXT: .byte 19 # DW_FORM_ref4
; CHECK-NEXT: .byte 63 # DW_AT_external
; CHECK-NEXT: .byte 12 # DW_FORM_flag
; CHECK-NEXT: .byte 0 # EOM(1)
; CHECK-NEXT: .byte 0 # EOM(2)
; CHECK-NEXT: .byte 3 # Abbreviation Code
; CHECK-NEXT: .byte 36 # DW_TAG_base_type
; CHECK-NEXT: .byte 0 # DW_CHILDREN_no
; CHECK-NEXT: .byte 3 # DW_AT_name
; CHECK-NEXT: .byte 14 # DW_FORM_strp
; CHECK-NEXT: .byte 62 # DW_AT_encoding
; CHECK-NEXT: .byte 11 # DW_FORM_data1
; CHECK-NEXT: .byte 11 # DW_AT_byte_size
; CHECK-NEXT: .byte 11 # DW_FORM_data1
; CHECK-NEXT: .byte 0 # EOM(1)
; CHECK-NEXT: .byte 0 # EOM(2)
; CHECK-NEXT: .byte 0 # EOM(3)
; CHECK: .dwsect 0x10000
; CHECK-NEXT: L...dwinfo:
; CHECK-NEXT: L..cu_begin0:
; CHECK-NEXT: .vbyte 2, 3 # DWARF version number
; CHECK-NEXT: .vbyte 4, L...dwabrev # Offset Into Abbrev. Section
; CHECK-NEXT: .byte 4 # Address Size (in bytes)
; CHECK-NEXT: .byte 1 # Abbrev [1] 0xb:0x51 DW_TAG_compile_unit
; CHECK-NEXT: .vbyte 4, L..info_string0 # DW_AT_producer
; CHECK-NEXT: .vbyte 2, 12 # DW_AT_language
; CHECK-NEXT: .vbyte 4, L..info_string1 # DW_AT_name
; CHECK-NEXT: .vbyte 4, L..line_table_start0 # DW_AT_stmt_list
; CHECK-NEXT: .vbyte 4, L..info_string2 # DW_AT_comp_dir
; CHECK-NEXT: .vbyte 4, 0 # DW_AT_low_pc
; CHECK-NEXT: .vbyte 4, L..debug_ranges0 # DW_AT_ranges
; CHECK-NEXT: .byte 2 # Abbrev [2] 0x26:0x17 DW_TAG_subprogram
; CHECK-NEXT: .vbyte 4, L..func_begin0 # DW_AT_low_pc
; CHECK-NEXT: .vbyte 4, L..func_end0 # DW_AT_high_pc
; CHECK-NEXT: .byte 1 # DW_AT_frame_base
; CHECK-NEXT: .byte 81
; CHECK-NEXT: .vbyte 4, L..info_string3 # DW_AT_name
; CHECK-NEXT: .byte 1 # DW_AT_decl_file
; CHECK-NEXT: .byte 1 # DW_AT_decl_line
; CHECK-NEXT: .byte 1 # DW_AT_prototyped
; CHECK-NEXT: .vbyte 4, 84 # DW_AT_type
; CHECK-NEXT: .byte 1 # DW_AT_external
; CHECK-NEXT: .byte 2 # Abbrev [2] 0x3d:0x17 DW_TAG_subprogram
; CHECK-NEXT: .vbyte 4, L..func_begin1 # DW_AT_low_pc
; CHECK-NEXT: .vbyte 4, L..func_end1 # DW_AT_high_pc
; CHECK-NEXT: .byte 1 # DW_AT_frame_base
; CHECK-NEXT: .byte 81
; CHECK-NEXT: .vbyte 4, L..info_string5 # DW_AT_name
; CHECK-NEXT: .byte 1 # DW_AT_decl_file
; CHECK-NEXT: .byte 6 # DW_AT_decl_line
; CHECK-NEXT: .byte 1 # DW_AT_prototyped
; CHECK-NEXT: .vbyte 4, 84 # DW_AT_type
; CHECK-NEXT: .byte 1 # DW_AT_external
; CHECK-NEXT: .byte 3 # Abbrev [3] 0x54:0x7 DW_TAG_base_type
; CHECK-NEXT: .vbyte 4, L..info_string4 # DW_AT_name
; CHECK-NEXT: .byte 5 # DW_AT_encoding
; CHECK-NEXT: .byte 4 # DW_AT_byte_size
; CHECK-NEXT: .byte 0 # End Of Children Mark
; CHECK-NEXT: L..debug_info_end0:
; CHECK: .dwsect 0x80000
; CHECK-NEXT: L...dwrnges:
; CHECK-NEXT: L..debug_ranges0:
; CHECK-NEXT: .vbyte 4, L..func_begin0
; CHECK-NEXT: .vbyte 4, L..func_end0
; CHECK-NEXT: .vbyte 4, L..func_begin1
; CHECK-NEXT: .vbyte 4, L..func_end1
; CHECK-NEXT: .vbyte 4, 0
; CHECK-NEXT: .vbyte 4, 0
; CHECK: .dwsect 0x70000
; CHECK-NEXT: L...dwstr:
; CHECK-NEXT: L..info_string0:
; CHECK-NEXT: .string "clang version 13.0.0" # string offset=0
; CHECK-NEXT: L..info_string1:
; CHECK-NEXT: .string "1.c" # string offset=21
; CHECK-NEXT: L..info_string2:
; CHECK-NEXT: .string "debug" # string offset=25
; CHECK-NEXT: L..info_string3:
; CHECK-NEXT: .string "foo" # string offset=31
; CHECK-NEXT: L..info_string4:
; CHECK-NEXT: .string "int" # string offset=35
; CHECK-NEXT: L..info_string5:
; CHECK-NEXT: .string "bar" # string offset=39
; CHECK-NEXT: .toc
; CHECK: .dwsect 0x20000
; CHECK-NEXT: L...dwline:
; CHECK-NEXT: L..debug_line_0:
; CHECK-NEXT: .set L..line_table_start0, L..debug_line_0-4
; CHECK-NEXT: .vbyte 2, 3
; CHECK-NEXT: .vbyte 4, L..prologue_end0-L..prologue_start0
; CHECK-NEXT: L..prologue_start0:
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte -5
; CHECK-NEXT: .byte 14
; CHECK-NEXT: .byte 13
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte "debug"
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte "1.c"
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .byte 0
; CHECK-NEXT: L..prologue_end0:
; CHECK-NEXT: .byte 0 # Set address to L..tmp0
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..tmp0
; CHECK-NEXT: .byte 19 # Start sequence
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 3
; CHECK-NEXT: .byte 10
; CHECK-NEXT: .byte 0 # Set address to L..tmp1
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..tmp1
; CHECK-NEXT: .byte 3 # Advance line 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0 # Set address to L..func_end0
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..func_end0
; CHECK-NEXT: .byte 0 # End sequence
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0 # Set address to L..tmp3
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..tmp3
; CHECK-NEXT: .byte 24 # Start sequence
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 3
; CHECK-NEXT: .byte 10
; CHECK-NEXT: .byte 0 # Set address to L..tmp4
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..tmp4
; CHECK-NEXT: .byte 3 # Advance line 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0 # Set address to L..func_end1
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .vbyte 4, L..func_end1
; CHECK-NEXT: .byte 0 # End sequence
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: L..debug_line_end0:
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