[lld] r355306 - [LLD] add test for line number info related to differrent .text sections
Alexey Lapshin via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 4 02:42:55 PST 2019
Author: avl
Date: Mon Mar 4 02:42:54 2019
New Revision: 355306
URL: http://llvm.org/viewvc/llvm-project?rev=355306&view=rev
Log:
[LLD] add test for line number info related to differrent .text sections
There is a bug for llvm-objdump which incorrectly reported line number
info for object file if several .text sections presented.
https://bugs.llvm.org/show_bug.cgi?id=40703 .
This patch adds test for the same situation.
Differential revision: https://reviews.llvm.org/D58357
Added:
lld/trunk/test/ELF/debug-line-obj.s
Added: lld/trunk/test/ELF/debug-line-obj.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/debug-line-obj.s?rev=355306&view=auto
==============================================================================
--- lld/trunk/test/ELF/debug-line-obj.s (added)
+++ lld/trunk/test/ELF/debug-line-obj.s Mon Mar 4 02:42:54 2019
@@ -0,0 +1,177 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux -dwarf-version=5 %s -o %t.o
+# RUN: not ld.lld %t.o -o %t1 2>&1 | FileCheck %s
+
+# When compiling with -ffunction-sections, .debug_line may contain descriptions
+# of locations from the different text sections. Until relocated such
+# descriptions might contain overlapping offsets. Check LLD is able to report
+# the error locations correctly in this case.
+
+# CHECK: error: undefined symbol: foo()
+# CHECK-NEXT: >>> referenced by test.cpp:2
+# CHECK-NEXT: >>> {{.*}}.o:(bar())
+# CHECK: error: undefined symbol: foo()
+# CHECK-NEXT: >>> referenced by test.cpp:3
+# CHECK-NEXT: >>> {{.*}}.o:(baz())
+
+# The code below is the reduced version of the output
+# from the following invocation and source:
+#
+# // test.cpp:
+# int foo();
+# int bar() { return foo(); }
+# int baz() { return foo(); }
+#
+# clang -gdwarf-5 -ffunction-sections test.cpp -o test.s -S
+
+.text
+.file "test.cpp"
+.section .text._Z3barv,"ax", at progbits
+.globl _Z3barv
+.type _Z3barv, at function
+_Z3barv:
+.Lfunc_begin0:
+ .file 0 "/path" "test.cpp" md5 0x9ff11a8404ab4d032ee2dd4f5f8c4140
+ .file 1 "test.cpp" md5 0x9ff11a8404ab4d032ee2dd4f5f8c4140
+ .loc 1 2 0 # test.cpp:2:0
+ .loc 1 2 20 prologue_end # test.cpp:2:20
+ callq _Z3foov
+ .loc 1 2 13 is_stmt 0 # test.cpp:2:13
+.Lfunc_end0:
+.size _Z3barv, .Lfunc_end0-_Z3barv
+ # -- End function
+.section .text._Z3bazv,"ax", at progbits
+.globl _Z3bazv # -- Begin function _Z3bazv
+ .type _Z3bazv, at function
+_Z3bazv: # @_Z3bazv
+.Lfunc_begin1:
+ .loc 1 3 0 is_stmt 1 # test.cpp:3:0
+ .loc 1 3 20 prologue_end # test.cpp:3:20
+ callq _Z3foov
+ .loc 1 3 13 is_stmt 0 # test.cpp:3:13
+.Lfunc_end1:
+ .size _Z3bazv, .Lfunc_end1-_Z3bazv
+
+.section .debug_str,"MS", at progbits,1
+.Linfo_string0:
+ .asciz "stub"
+
+.section .debug_str_offsets,"", at progbits
+ .long 8
+ .short 5
+ .short 0
+.Lstr_offsets_base0:
+ .long .Linfo_string0
+
+.section .debug_abbrev,"", at progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .byte 37 # DW_FORM_strx1
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 114 # DW_AT_str_offsets_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 27 # DW_AT_comp_dir
+ .byte 37 # DW_FORM_strx1
+ .byte 115 # DW_AT_addr_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 85 # DW_AT_ranges
+ .byte 35 # DW_FORM_rnglistx
+ .byte 116 # DW_AT_rnglists_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 2 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 0 # DW_CHILDREN_no
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 64 # DW_AT_frame_base
+ .byte 24 # DW_FORM_exprloc
+ .byte 110 # DW_AT_linkage_name
+ .byte 37 # DW_FORM_strx1
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 3 # Abbreviation Code
+ .byte 36 # DW_TAG_base_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 62 # DW_AT_encoding
+ .byte 11 # DW_FORM_data1
+ .byte 11 # DW_AT_byte_size
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+.section .debug_info,"", at progbits
+.Lcu_begin0:
+ .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+ .short 5 # DWARF version number
+ .byte 1 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .byte 1 # Abbrev [1] 0xc:0x44 DW_TAG_compile_unit
+ .byte 0 # DW_AT_producer
+ .short 4 # DW_AT_language
+ .byte 0 # DW_AT_name
+ .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .byte 2 # DW_AT_comp_dir
+ .long 0 # DW_AT_addr_base
+ .quad 0 # DW_AT_low_pc
+ .byte 0 # DW_AT_ranges
+ .long 0 # DW_AT_rnglists_base
+ .byte 2 # Abbrev [2] 0x2b:0x10 DW_TAG_subprogram
+ .byte 0 # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 86
+ .byte 3 # DW_AT_linkage_name
+ .byte 0 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 75 # DW_AT_type
+ # DW_AT_external
+ .byte 2 # Abbrev [2] 0x3b:0x10 DW_TAG_subprogram
+ .byte 1 # DW_AT_low_pc
+ .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 86
+ .byte 6 # DW_AT_linkage_name
+ .byte 0 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 3 # DW_AT_decl_line
+ .long 75 # DW_AT_type
+ # DW_AT_external
+ .byte 3 # Abbrev [3] 0x4b:0x4 DW_TAG_base_type
+ .byte 0 # DW_AT_name
+ .byte 5 # DW_AT_encoding
+ .byte 4 # DW_AT_byte_size
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end0:
+
+.section .debug_line,"", at progbits
+.Lline_table_start0:
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