75f770a68f
When output range is only one entry, and input is low_pc/high_pc do not convert to ranges. This helps with size of .debug_ranges/.debug_rnglists. It also helps when either low_pc/high_pc is 0. We not generating potentially invalid ranges that result in LLDB error. Also fixed handling of DW_AT_subprogram with ranges. This can be created with -fbasic-block-sections=all. Reviewed By: maksfb Differential Revision: https://reviews.llvm.org/D156374
386 lines
17 KiB
ArmAsm
386 lines
17 KiB
ArmAsm
# clang++ -fbasic-block-sections=all -ffunction-sections -g2 -gdwarf-5
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# int doStuff(int val) {
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# if (val)
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# ++val;
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# return val;
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# }
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#
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# int main(int argc, const char** argv) {
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# return doStuff(argc);
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# }
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.text
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.file "main.cpp"
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.section .text._Z7doStuffi,"ax",@progbits
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.globl _Z7doStuffi # -- Begin function _Z7doStuffi
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.p2align 4, 0x90
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.type _Z7doStuffi,@function
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_Z7doStuffi: # @_Z7doStuffi
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.Lfunc_begin0:
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.file 0 "/subprogramRanges" "main.cpp" md5 0x45fd34ef778739dca24be206894f1d15
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.loc 0 1 0 # main.cpp:1:0
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.cfi_startproc
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# %bb.0: # %entry
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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movl %edi, -4(%rbp)
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.Ltmp0:
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.loc 0 2 7 prologue_end # main.cpp:2:7
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cmpl $0, -4(%rbp)
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.Ltmp1:
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.loc 0 2 7 is_stmt 0 # main.cpp:2:7
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je _Z7doStuffi.__part.2
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jmp _Z7doStuffi.__part.1
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.LBB_END0_0:
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.cfi_endproc
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.section .text._Z7doStuffi,"ax",@progbits,unique,1
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_Z7doStuffi.__part.1: # %if.then
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.cfi_startproc
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.cfi_def_cfa %rbp, 16
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.cfi_offset %rbp, -16
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.loc 0 3 5 is_stmt 1 # main.cpp:3:5
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movl -4(%rbp), %eax
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addl $1, %eax
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movl %eax, -4(%rbp)
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jmp _Z7doStuffi.__part.2
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.LBB_END0_1:
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.size _Z7doStuffi.__part.1, .LBB_END0_1-_Z7doStuffi.__part.1
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.cfi_endproc
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.section .text._Z7doStuffi,"ax",@progbits,unique,2
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_Z7doStuffi.__part.2: # %if.end
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.cfi_startproc
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.cfi_def_cfa %rbp, 16
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.cfi_offset %rbp, -16
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.loc 0 4 10 # main.cpp:4:10
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movl -4(%rbp), %eax
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.loc 0 4 3 epilogue_begin is_stmt 0 # main.cpp:4:3
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popq %rbp
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.cfi_def_cfa %rsp, 8
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retq
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.LBB_END0_2:
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.size _Z7doStuffi.__part.2, .LBB_END0_2-_Z7doStuffi.__part.2
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.cfi_endproc
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.section .text._Z7doStuffi,"ax",@progbits
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.Lfunc_end0:
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.size _Z7doStuffi, .Lfunc_end0-_Z7doStuffi
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# -- End function
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.section .text.main,"ax",@progbits
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.globl main # -- Begin function main
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.p2align 4, 0x90
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.type main,@function
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main: # @main
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.Lfunc_begin1:
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.loc 0 7 0 is_stmt 1 # main.cpp:7:0
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.cfi_startproc
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# %bb.0: # %entry
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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subq $16, %rsp
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movl $0, -4(%rbp)
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movl %edi, -8(%rbp)
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movq %rsi, -16(%rbp)
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.Ltmp2:
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.loc 0 8 21 prologue_end # main.cpp:8:21
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movl -8(%rbp), %edi
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.loc 0 8 13 is_stmt 0 # main.cpp:8:13
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callq _Z7doStuffi
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.loc 0 8 5 epilogue_begin # main.cpp:8:5
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addq $16, %rsp
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popq %rbp
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.cfi_def_cfa %rsp, 8
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retq
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.LBB_END1_0:
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.cfi_endproc
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.Lfunc_end1:
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.size main, .Lfunc_end1-main
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# -- End function
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 37 # DW_FORM_strx1
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.byte 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 114 # DW_AT_str_offsets_base
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.byte 23 # DW_FORM_sec_offset
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.byte 16 # DW_AT_stmt_list
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.byte 23 # DW_FORM_sec_offset
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.byte 27 # DW_AT_comp_dir
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.byte 37 # DW_FORM_strx1
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 85 # DW_AT_ranges
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.byte 35 # DW_FORM_rnglistx
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.byte 115 # DW_AT_addr_base
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.byte 23 # DW_FORM_sec_offset
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.byte 116 # DW_AT_rnglists_base
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.byte 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 85 # DW_AT_ranges
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.byte 35 # DW_FORM_rnglistx
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.byte 110 # DW_AT_linkage_name
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.byte 37 # DW_FORM_strx1
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 3 # Abbreviation Code
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.byte 5 # DW_TAG_formal_parameter
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.byte 0 # DW_CHILDREN_no
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.byte 2 # DW_AT_location
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 4 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 1 # DW_CHILDREN_yes
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.byte 17 # DW_AT_low_pc
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.byte 27 # DW_FORM_addrx
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 5 # Abbreviation Code
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.byte 36 # DW_TAG_base_type
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.byte 0 # DW_CHILDREN_no
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 62 # DW_AT_encoding
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.byte 11 # DW_FORM_data1
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.byte 11 # DW_AT_byte_size
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.byte 11 # DW_FORM_data1
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 6 # Abbreviation Code
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.byte 15 # DW_TAG_pointer_type
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 7 # Abbreviation Code
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.byte 38 # DW_TAG_const_type
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.byte 0 # DW_CHILDREN_no
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.byte 73 # DW_AT_type
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.byte 19 # DW_FORM_ref4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbrev [1] 0xc:0x75 DW_TAG_compile_unit
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.byte 0 # DW_AT_producer
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.short 33 # DW_AT_language
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.byte 1 # DW_AT_name
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.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
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.long .Lline_table_start0 # DW_AT_stmt_list
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.byte 2 # DW_AT_comp_dir
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.quad 0 # DW_AT_low_pc
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.byte 1 # DW_AT_ranges
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.long .Laddr_table_base0 # DW_AT_addr_base
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.long .Lrnglists_table_base0 # DW_AT_rnglists_base
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.byte 2 # Abbrev [2] 0x2b:0x18 DW_TAG_subprogram
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.byte 0 # DW_AT_ranges
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.byte 1 # DW_AT_frame_base
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.byte 86
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.byte 3 # DW_AT_linkage_name
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.byte 4 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 1 # DW_AT_decl_line
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.long 105 # DW_AT_type
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# DW_AT_external
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.byte 3 # Abbrev [3] 0x37:0xb DW_TAG_formal_parameter
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.byte 2 # DW_AT_location
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.byte 145
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.byte 124
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.byte 7 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 1 # DW_AT_decl_line
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.long 105 # DW_AT_type
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.byte 0 # End Of Children Mark
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.byte 4 # Abbrev [4] 0x43:0x26 DW_TAG_subprogram
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.byte 3 # DW_AT_low_pc
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.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
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.byte 1 # DW_AT_frame_base
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.byte 86
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.byte 6 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 7 # DW_AT_decl_line
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.long 105 # DW_AT_type
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# DW_AT_external
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.byte 3 # Abbrev [3] 0x52:0xb DW_TAG_formal_parameter
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.byte 2 # DW_AT_location
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.byte 145
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.byte 120
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.byte 8 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 7 # DW_AT_decl_line
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.long 105 # DW_AT_type
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.byte 3 # Abbrev [3] 0x5d:0xb DW_TAG_formal_parameter
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.byte 2 # DW_AT_location
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.byte 145
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.byte 112
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.byte 9 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 7 # DW_AT_decl_line
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.long 109 # DW_AT_type
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.byte 0 # End Of Children Mark
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.byte 5 # Abbrev [5] 0x69:0x4 DW_TAG_base_type
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.byte 5 # DW_AT_name
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.byte 5 # DW_AT_encoding
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.byte 4 # DW_AT_byte_size
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.byte 6 # Abbrev [6] 0x6d:0x5 DW_TAG_pointer_type
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.long 114 # DW_AT_type
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.byte 6 # Abbrev [6] 0x72:0x5 DW_TAG_pointer_type
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.long 119 # DW_AT_type
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.byte 7 # Abbrev [7] 0x77:0x5 DW_TAG_const_type
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.long 124 # DW_AT_type
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.byte 5 # Abbrev [5] 0x7c:0x4 DW_TAG_base_type
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.byte 10 # DW_AT_name
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.byte 6 # DW_AT_encoding
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.byte 1 # DW_AT_byte_size
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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.section .debug_rnglists,"",@progbits
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.long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length
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.Ldebug_list_header_start0:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 2 # Offset entry count
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.Lrnglists_table_base0:
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.long .Ldebug_ranges0-.Lrnglists_table_base0
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.long .Ldebug_ranges1-.Lrnglists_table_base0
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.Ldebug_ranges0:
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.byte 3 # DW_RLE_startx_length
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.byte 0 # start index
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.uleb128 .LBB_END0_1-_Z7doStuffi.__part.1 # length
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.byte 3 # DW_RLE_startx_length
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.byte 1 # start index
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.uleb128 .LBB_END0_2-_Z7doStuffi.__part.2 # length
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.byte 3 # DW_RLE_startx_length
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.byte 2 # start index
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.uleb128 .Lfunc_end0-.Lfunc_begin0 # length
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.byte 0 # DW_RLE_end_of_list
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.Ldebug_ranges1:
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.byte 3 # DW_RLE_startx_length
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.byte 0 # start index
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.uleb128 .LBB_END0_1-_Z7doStuffi.__part.1 # length
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.byte 3 # DW_RLE_startx_length
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.byte 1 # start index
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.uleb128 .LBB_END0_2-_Z7doStuffi.__part.2 # length
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.byte 3 # DW_RLE_startx_length
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.byte 2 # start index
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.uleb128 .Lfunc_end0-.Lfunc_begin0 # length
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.byte 3 # DW_RLE_startx_length
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.byte 3 # start index
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.uleb128 .Lfunc_end1-.Lfunc_begin1 # length
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.byte 0 # DW_RLE_end_of_list
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.Ldebug_list_header_end0:
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.section .debug_str_offsets,"",@progbits
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.long 48 # Length of String Offsets Set
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.short 5
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.short 0
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.Lstr_offsets_base0:
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.section .debug_str,"MS",@progbits,1
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.Linfo_string0:
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.asciz "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)" # string offset=0
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.Linfo_string1:
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.asciz "main.cpp" # string offset=105
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.Linfo_string2:
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.asciz "/subprogramRanges" # string offset=114
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.Linfo_string3:
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.asciz "_Z7doStuffi" # string offset=169
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.Linfo_string4:
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.asciz "doStuff" # string offset=181
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.Linfo_string5:
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.asciz "int" # string offset=189
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.Linfo_string6:
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.asciz "main" # string offset=193
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.Linfo_string7:
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.asciz "val" # string offset=198
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.Linfo_string8:
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.asciz "argc" # string offset=202
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.Linfo_string9:
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.asciz "argv" # string offset=207
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.Linfo_string10:
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.asciz "char" # string offset=212
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.section .debug_str_offsets,"",@progbits
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.long .Linfo_string0
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.long .Linfo_string1
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.long .Linfo_string2
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.long .Linfo_string3
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.long .Linfo_string4
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.long .Linfo_string5
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.long .Linfo_string6
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.long .Linfo_string7
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.long .Linfo_string8
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.long .Linfo_string9
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.long .Linfo_string10
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.section .debug_addr,"",@progbits
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.long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
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.Ldebug_addr_start0:
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.short 5 # DWARF version number
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.Laddr_table_base0:
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.quad _Z7doStuffi.__part.1
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.quad _Z7doStuffi.__part.2
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.quad .Lfunc_begin0
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.quad .Lfunc_begin1
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.Ldebug_addr_end0:
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.ident "clang version 17.0.0 (https://github.com/llvm/llvm-project.git 640e07c49037cca41a1bfbeb916b569d8c950aea)"
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.section ".note.GNU-stack","",@progbits
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.addrsig
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.addrsig_sym _Z7doStuffi
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.section .debug_line,"",@progbits
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.Lline_table_start0:
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