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[DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing

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This patch adds half a dozen new tests that test various edge cases in
the behaviour of the symbolizer and DWARF data parsing. All of them test
the current behaviour.

Reviewed by: JDevlieghere, aprantl

Differential Revision: https://reviews.llvm.org/D57741

llvm-svn: 353286
This commit is contained in:
James Henderson 2019-02-06 10:13:14 +00:00
parent 0d2c2e0745
commit 89642abc65
8 changed files with 307 additions and 0 deletions
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6
test/DebugInfo/Inputs/symbolize-64bit-addr.c Normal file
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int _start() {
return 0;
}
// Compile with "clang --target=x86_64-pc-linux -c -g symbolize-64bit-addr.c".
// Link with "ld.lld -Ttext=0xffffffff00000000 symbolize-64bit-addr.o -o symbolize-64bit-addr.elf.x86_64".

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test/DebugInfo/Inputs/symbolize-64bit-addr.elf.x86_64 Executable file
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6
test/DebugInfo/symbolize-64bit-address.test Normal file
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RUN: llvm-symbolizer 0xffffffff00000000 -a --obj=%p/Inputs/symbolize-64bit-addr.elf.x86_64 \
RUN: | FileCheck %s
CHECK: 0xffffffff00000000
CHECK-NEXT: _start
CHECK-NEXT: symbolize-64bit-addr.c:1:0

106
test/DebugInfo/symbolize-absolute-path-in-debug-line.s Normal file
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# Create .debug_line containing absolute path in filename. Show that the path is sensibly printed/found/etc.
# REQUIRES: x86-registered-target
# RUN: sed s!FILEPATH!%/s! %s > %t.s
# RUN: llvm-mc --filetype=obj --triple=x86_64-pc-linux %t.s -o %t.o
# RUN: llvm-symbolizer --obj=%t.o 0 | FileCheck %s -DPATH=%/s
# CHECK: {{^}}[[PATH]]:1:0
.type _start,@function
_start:
.Lfunc_begin0:
ret
.Lfunc_end0:
.section .debug_str,"MS",@progbits,1
.Linfo_string1:
.asciz "test.c"
.Linfo_string2:
.asciz "/some/dir"
.Linfo_string3:
.asciz "_start"
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 14 # DW_FORM_strp
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.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 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.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:0x35 DW_TAG_compile_unit
.long .Linfo_string1 # DW_AT_name
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Linfo_string2 # DW_AT_comp_dir
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 2 # Abbrev [2] 0x2a:0x15 DW_TAG_subprogram
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.long .Linfo_string3 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
# DW_AT_external
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
# Hand-written .debug_line to allow replacing in the absolute path
# into the filename table at runtime.
.section .debug_line,"",@progbits
.Lline_table_start0:
.long .Ltable_end - .Ltable_start # unit length
.Ltable_start:
.short 4 # version
.long .Lheader_end - .Lheader_start # header length
.Lheader_start:
.byte 1 # min instruction length
.byte 1 # max ops per instruction
.byte 1 # 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 # standard opcode lengths
.byte 0 # directory table
.asciz "FILEPATH" # filename table
.byte 0, 0, 0
.byte 0
.Lheader_end:
.byte 0, 9, 2 # DW_LNE_set_address
.quad .Lfunc_begin0
.byte 1 # DW_LNS_copy
.byte 33 # +1 address, +1 line
.byte 0, 1, 1 # DW_LNE_end_sequence
.Ltable_end:

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test/DebugInfo/symbolize-no-debug-str.test Normal file
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RUN: llvm-objcopy -R .debug_str %p/Inputs/llvm-symbolizer-test.elf-x86-64 %t.elf
RUN: llvm-symbolizer --functions=linkage --obj=%t.elf 0x401140 | FileCheck %s --check-prefix=LINKAGE
RUN: llvm-symbolizer --functions=short --obj=%t.elf 0x401140 | FileCheck %s --check-prefix=SHORT
LINKAGE: main
LINKAGE-NEXT: {{^}}llvm-symbolizer-test.c:10:0
SHORT: ??
SHORT-NEXT: {{^}}llvm-symbolizer-test.c:10:0

162
test/DebugInfo/symbolize-shared-abbrev.s Normal file
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# Show that multiple CUs can have a single common .debug_abbrev table. This can
# occur due to e.g. LTO.
# REQUIRES: x86-registered-target
# RUN: llvm-mc --filetype=obj --triple=x86_64-pc-linux %s -o %t.o
# RUN: llvm-symbolizer --obj=%t.o 0 16 --functions=short | FileCheck %s
# CHECK: foo
# CHECK-NEXT: foo.c:1:0
# CHECK: bar
# CHECK-NEXT: bar.c:2:0
.global foo
.type foo,@function
foo:
.Lfunc_begin0:
.file 1 "." "foo.c"
.loc 1 1 0
ret
.Lfunc_end0:
.global bar
.p2align 4, 0x90
.type bar,@function
bar:
.Lfunc_begin1:
.file 2 "." "bar.c"
.loc 2 2 0
ret
.Lfunc_end1:
.section .debug_str,"MS",@progbits,1
.Linfo_string1:
.asciz "foo.c"
.Linfo_string2:
.asciz "."
.Linfo_string3:
.asciz "foo"
.Linfo_string4:
.asciz "bar.c"
.Linfo_string5:
.asciz "bar"
# Regular .debug_abbrev section with CU and subprogram, but duplicated, with second
# half reordered slightly, to show that the correct abbrev is being referenced.
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 14 # DW_FORM_strp
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.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 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
# Second-half starts here.
.byte 3 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 14 # DW_FORM_strp
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 4 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
# First CU table.
.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:0x35 DW_TAG_compile_unit
.long .Linfo_string1 # DW_AT_name
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Linfo_string2 # DW_AT_comp_dir
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 2 # Abbrev [2] 0x2a:0x15 DW_TAG_subprogram
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.long .Linfo_string3 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
# DW_AT_external
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
# Second CU table.
.long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
.Ldebug_info_start1:
.short 4 # DWARF version number
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 8 # Address Size (in bytes)
.byte 3 # Abbrev [1] 0xb:0x35 DW_TAG_compile_unit
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Linfo_string2 # DW_AT_comp_dir
.quad .Lfunc_begin1 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.long .Linfo_string4 # DW_AT_name
.byte 4 # Abbrev [2] 0x2a:0x15 DW_TAG_subprogram
.quad .Lfunc_begin1 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
# DW_AT_external
.long .Linfo_string5 # DW_AT_name
.byte 0 # End Of Children Mark
.Ldebug_info_end1:
.section .debug_line,"",@progbits
.Lline_table_start0:

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test/DebugInfo/symbolize-stripped-sections.test Normal file
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RUN: llvm-symbolizer --obj=%p/Inputs/llvm-symbolizer-test.elf-x86-64 0x401140 \
RUN: | FileCheck %s --check-prefix=UNSTRIPPED
RUN: llvm-objcopy --strip-sections %p/Inputs/llvm-symbolizer-test.elf-x86-64 %t.elf
RUN: llvm-symbolizer --obj=%t.elf 0x401140 | FileCheck %s --check-prefix=STRIPPED
UNSTRIPPED: main
UNSTRIPPED-NEXT: llvm-symbolizer-test.c:10:0
STRIPPED: ??
STRIPPED-NEXT: ??:0:0

7
test/tools/llvm-symbolizer/invalid-input-address.test Normal file
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# Use address that can't fit in a 64-bit number. Show that llvm-symbolizer
# simply echoes it as per other malformed input addresses.
RUN: llvm-symbolizer --obj=addr.exe 0x10000000000000000 | FileCheck %s
CHECK-NOT: {{.}}
CHECK: 0x10000000000000000
CHECK-NOT: {{.}}