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mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-19 06:31:18 +00:00
Eric Christopher 8b97f004cb Reapply DW_AT_low/high_pc patch:
Use the range machinery for DW_AT_ranges and DW_AT_high/lo_pc.

    This commit moves us from a single range per subprogram to extending
    ranges if we are:

    a) In the same section, and
    b) In the same enclosing CU.

    This means we have more fine grained ranges for compile units, and fewer
    ranges overall when we have multiple functions in the same CU
    adjacent to each other in the object file.

    Also remove all of the earlier hacks around this functionality for
    function sections etc. Also update all of the testcases to take into
    account the merging functionality.

with a fix for location entries in the debug_loc section:

Make sure that debug loc entries are relative to the low_pc
of the compile unit. This means that when we only have a single
range that the offset should be just relative to the low_pc
of the unit, for multiple ranges for a CU this means that we'll be
relative to 0 which we emit along with DW_AT_ranges.

This mostly shows up with linked binaries, so add a testcase with
multiple CUs so that our location is going to be offset of a CU
with a non-zero low_pc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204377 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-20 19:16:16 +00:00

116 lines
5.1 KiB
LLVM

; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck %s
; RUN: llvm-readobj --relocations %t | FileCheck --check-prefix=OBJ %s
; RUN: llvm-objdump -h %t | FileCheck --check-prefix=HDR %s
@a = common global i32 0, align 4
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9}
!0 = metadata !{i32 786449, metadata !8, i32 12, metadata !"clang version 3.3 (trunk 169021) (llvm/trunk 169020)", i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3, metadata !1, metadata !"baz.dwo"} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/baz.c] [DW_LANG_C99]
!1 = metadata !{}
!3 = metadata !{metadata !5}
!5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, i32* @a, null} ; [ DW_TAG_variable ] [a] [line 1] [def]
!6 = metadata !{i32 786473, metadata !8} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!8 = metadata !{metadata !"baz.c", metadata !"/usr/local/google/home/echristo/tmp"}
; Check that the skeleton compile unit contains the proper attributes:
; This DIE has the following attributes: DW_AT_comp_dir, DW_AT_stmt_list,
; DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges, DW_AT_dwo_name, DW_AT_dwo_id,
; DW_AT_ranges_base, DW_AT_addr_base.
; CHECK: .debug_abbrev contents:
; CHECK: Abbrev table for offset: 0x00000000
; CHECK: [1] DW_TAG_compile_unit DW_CHILDREN_no
; CHECK: DW_AT_stmt_list DW_FORM_sec_offset
; CHECK: DW_AT_GNU_dwo_name DW_FORM_strp
; CHECK: DW_AT_GNU_addr_base DW_FORM_sec_offset
; CHECK: DW_AT_comp_dir DW_FORM_strp
; CHECK: DW_AT_GNU_dwo_id DW_FORM_data8
; Check that we're using the right forms.
; CHECK: .debug_abbrev.dwo contents:
; CHECK: Abbrev table for offset: 0x00000000
; CHECK: [1] DW_TAG_compile_unit DW_CHILDREN_yes
; CHECK: DW_AT_producer DW_FORM_GNU_str_index
; CHECK: DW_AT_language DW_FORM_data2
; CHECK: DW_AT_name DW_FORM_GNU_str_index
; CHECK-NOT: DW_AT_low_pc
; CHECK-NOT: DW_AT_stmt_list
; CHECK-NOT: DW_AT_comp_dir
; CHECK: DW_AT_GNU_dwo_id DW_FORM_data8
; CHECK: [2] DW_TAG_variable DW_CHILDREN_no
; CHECK: DW_AT_name DW_FORM_GNU_str_index
; CHECK: DW_AT_type DW_FORM_ref4
; CHECK: DW_AT_external DW_FORM_flag_present
; CHECK: DW_AT_decl_file DW_FORM_data1
; CHECK: DW_AT_decl_line DW_FORM_data1
; CHECK: DW_AT_location DW_FORM_exprloc
; CHECK: [3] DW_TAG_base_type DW_CHILDREN_no
; CHECK: DW_AT_name DW_FORM_GNU_str_index
; CHECK: DW_AT_encoding DW_FORM_data1
; CHECK: DW_AT_byte_size DW_FORM_data1
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_GNU_dwo_name [DW_FORM_strp] ( .debug_str[0x00000000] = "baz.dwo")
; CHECK: DW_AT_GNU_addr_base [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000008] = "/usr/local/google/home/echristo/tmp")
; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x1f1f859683d49324)
; Check that the rest of the compile units have information.
; CHECK: .debug_info.dwo contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_producer [DW_FORM_GNU_str_index] ( indexed (00000000) string = "clang version 3.3 (trunk 169021) (llvm/trunk 169020)")
; CHECK: DW_AT_language [DW_FORM_data2] (0x000c)
; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000001) string = "baz.c")
; CHECK-NOT: DW_AT_low_pc
; CHECK-NOT: DW_AT_stmt_list
; CHECK-NOT: DW_AT_comp_dir
; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x1f1f859683d49324)
; CHECK: DW_TAG_variable
; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000002) string = "a")
; CHECK: DW_AT_type [DW_FORM_ref4] (cu + 0x{{[0-9a-f]*}} => {[[TYPE:0x[0-9a-f]*]]})
; CHECK: DW_AT_external [DW_FORM_flag_present] (true)
; CHECK: DW_AT_decl_file [DW_FORM_data1] (0x01)
; CHECK: DW_AT_decl_line [DW_FORM_data1] (0x01)
; CHECK: DW_AT_location [DW_FORM_exprloc] (<0x2> fb 00 )
; CHECK: [[TYPE]]: DW_TAG_base_type
; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000003) string = "int")
; CHECK: .debug_str contents:
; CHECK: 0x00000000: "baz.dwo"
; CHECK: 0x00000008: "/usr/local/google/home/echristo/tmp"
; CHECK: .debug_str.dwo contents:
; CHECK: 0x00000000: "clang version 3.3 (trunk 169021) (llvm/trunk 169020)"
; CHECK: 0x00000035: "baz.c"
; CHECK: 0x0000003b: "a"
; CHECK: 0x0000003d: "int"
; CHECK: .debug_str_offsets.dwo contents:
; CHECK: 0x00000000: 00000000
; CHECK: 0x00000004: 00000035
; CHECK: 0x00000008: 0000003b
; CHECK: 0x0000000c: 0000003d
; Object file checks
; For x86-64-linux we should have this set of relocations for the debug info section
;
; OBJ: .debug_info
; OBJ-NEXT: R_X86_64_32 .debug_abbrev
; OBJ-NEXT: R_X86_64_32 .debug_line
; OBJ-NEXT: R_X86_64_32 .debug_str
; OBJ-NEXT: R_X86_64_32 .debug_addr
; OBJ-NEXT: R_X86_64_32 .debug_str
; OBJ-NEXT: }
; HDR-NOT: .debug_aranges
!9 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}