Author: labath
Date: Wed May 22 04:44:36 2019
New Revision: 361373
URL: http://llvm.org/viewvc/llvm-project?rev=361373&view=rev
Log:
DWARF: Add debug_ranges/rnglists tests
.debug_ranges parsing is not well tested [citation needed] because this
section tends to be only used in optimized code, and we don't build
optimized executables in our tests, as they produce unpredictable
results.
This patch aims to add some very simple tests for parsing static range
data, which can serve as a first line of defense in case things break.
I also include one XFAILed test, which demonstrates that we don't
correctly handle mixed DWARF v5 and v4 ranges in a single file.
Added:
lldb/trunk/lit/SymbolFile/DWARF/debug_ranges.s
lldb/trunk/lit/SymbolFile/DWARF/debug_ranges_and_rnglists.test
lldb/trunk/lit/SymbolFile/DWARF/debug_rnglists.s
Added: lldb/trunk/lit/SymbolFile/DWARF/debug_ranges.s
URL:
http://llvm.org/viewvc/llvm-project/lldb/trunk/lit/SymbolFile/DWARF/debug_ranges.s?rev=361373&view=auto
==============================================================================
--- lldb/trunk/lit/SymbolFile/DWARF/debug_ranges.s (added)
+++ lldb/trunk/lit/SymbolFile/DWARF/debug_ranges.s Wed May 22 04:44:36 2019
@@ -0,0 +1,92 @@
+# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
+# RUN: %lldb %t -o "image lookup -v -s lookup_ranges" -o exit | FileCheck %s
+
+# CHECK: Function: id = {0x7fffffff0000001c}, name = "ranges", range =
[0x0000000000000000-0x0000000000000004)
+# CHECK: Blocks: id = {0x7fffffff0000001c}, range = [0x00000000-0x00000004)
+# CHECK-NEXT: id = {0x7fffffff0000002d}, ranges =
[0x00000001-0x00000002)[0x00000003-0x00000004)
+
+ .text
+ .p2align 12
+ .globl ranges
+ .type ranges,@function
+ranges: # @ranges
+.Lfoo_begin:
+ nop
+.Lblock1_begin:
+lookup_ranges:
+ nop
+.Lblock1_end:
+ nop
+.Lblock2_begin:
+ nop
+.Lblock2_end:
+.Lfunc_end0:
+ .size ranges, .Lfunc_end0-ranges
+ # -- End function
+ .section .debug_str,"MS",@progbits,1
+.Lproducer:
+ .asciz "Hand-written DWARF"
+.Lranges:
+ .asciz "ranges"
+
+ .section .debug_abbrev,"",@progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .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 1 # DW_CHILDREN_yes
+ .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 5 # Abbreviation Code
+ .byte 11 # DW_TAG_lexical_block
+ .byte 0 # DW_CHILDREN_no
+ .byte 85 # DW_AT_ranges
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+ .section .debug_info,"",@progbits
+.Lcu_begin0:
+ .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:0x7b
DW_TAG_compile_unit
+ .long .Lproducer # DW_AT_producer
+ .quad .Lfoo_begin # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfoo_begin # DW_AT_high_pc
+ .byte 2 # Abbrev [2] 0x2a:0x4d
DW_TAG_subprogram
+ .quad .Lfoo_begin # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfoo_begin # DW_AT_high_pc
+ .long .Lranges # DW_AT_name
+ .byte 5 # Abbrev [5] 0x61:0x15
DW_TAG_lexical_block
+ .long .Ldebug_ranges0 # DW_AT_ranges
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end0:
+
+ .section .debug_ranges,"",@progbits
+.Ldebug_ranges0:
+ .quad .Lblock1_begin-.Lfoo_begin
+ .quad .Lblock1_end-.Lfoo_begin
+ .quad .Lblock2_begin-.Lfoo_begin
+ .quad .Lblock2_end-.Lfoo_begin
+ .quad 0
+ .quad 0
Added: lldb/trunk/lit/SymbolFile/DWARF/debug_ranges_and_rnglists.test
URL:
http://llvm.org/viewvc/llvm-project/lldb/trunk/lit/SymbolFile/DWARF/debug_ranges_and_rnglists.test?rev=361373&view=auto
==============================================================================
--- lldb/trunk/lit/SymbolFile/DWARF/debug_ranges_and_rnglists.test (added)
+++ lldb/trunk/lit/SymbolFile/DWARF/debug_ranges_and_rnglists.test Wed May 22
04:44:36 2019
@@ -0,0 +1,19 @@
+# REQUIRES: lld
+# XFAIL: *
+
+# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %S/debug_ranges.s >
%t-ranges.o
+# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %S/debug_rnglists.s >
%t-rnglists.o
+# RUN: ld.lld -r %t-ranges.o %t-rnglists.o -o %t
+# RUN: %lldb %t -s %s | FileCheck %s
+
+image lookup -v -s lookup_ranges
+# CHECK-LABEL: image lookup -v -s lookup_ranges
+# CHECK: Function: {{.*}} name = "ranges", range =
[0x0000000000000000-0x0000000000000004)
+# CHECK: Blocks: {{.*}} range = [0x00000000-0x00000004)
+# CHECK-NEXT: {{.*}} ranges =
[0x00000001-0x00000002)[0x00000003-0x00000004)
+
+image lookup -v -s lookup_rnglists
+# CHECK-LABEL: image lookup -v -s lookup_rnglists
+# CHECK: Function: {{.*}} name = "rnglists", range =
[0x0000000000001000-0x0000000000001004)
+# CHECK: Blocks: {{.*}} range = [0x00001000-0x00001004)
+# CHECK-NEXT: {{.*}} ranges =
[0x00001001-0x00001002)[0x00001003-0x00001004)
Added: lldb/trunk/lit/SymbolFile/DWARF/debug_rnglists.s
URL:
http://llvm.org/viewvc/llvm-project/lldb/trunk/lit/SymbolFile/DWARF/debug_rnglists.s?rev=361373&view=auto
==============================================================================
--- lldb/trunk/lit/SymbolFile/DWARF/debug_rnglists.s (added)
+++ lldb/trunk/lit/SymbolFile/DWARF/debug_rnglists.s Wed May 22 04:44:36 2019
@@ -0,0 +1,108 @@
+# RUN: llvm-mc -triple=x86_64-pc-linux -filetype=obj %s > %t
+# RUN: %lldb %t -o "image lookup -v -s lookup_rnglists" -o exit | FileCheck %s
+
+# CHECK: Function: id = {0x7fffffff00000021}, name = "rnglists", range =
[0x0000000000000000-0x0000000000000004)
+# CHECK: Blocks: id = {0x7fffffff00000021}, range = [0x00000000-0x00000004)
+# CHECK-NEXT: id = {0x7fffffff00000032}, ranges =
[0x00000001-0x00000002)[0x00000003-0x00000004)
+
+ .text
+ .p2align 12
+ .globl rnglists
+ .type rnglists,@function
+rnglists: # @rnglists
+.Lfoo_begin:
+ nop
+.Lblock1_begin:
+lookup_rnglists:
+ nop
+.Lblock1_end:
+ nop
+.Lblock2_begin:
+ nop
+.Lblock2_end:
+.Lfunc_end0:
+ .size rnglists, .Lfunc_end0-rnglists
+ # -- End function
+ .section .debug_str,"MS",@progbits,1
+.Lproducer:
+ .asciz "Hand-written DWARF"
+.Lrnglists:
+ .asciz "rnglists"
+
+ .section .debug_abbrev,"",@progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .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 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 1 # DW_CHILDREN_yes
+ .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 5 # Abbreviation Code
+ .byte 11 # DW_TAG_lexical_block
+ .byte 0 # DW_CHILDREN_no
+ .byte 85 # DW_AT_ranges
+ .byte 35 # DW_FORM_rnglistx
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+ .section .debug_info,"",@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:0x5f
DW_TAG_compile_unit
+ .long .Lproducer # DW_AT_producer
+ .quad .Lfoo_begin # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfoo_begin # DW_AT_high_pc
+ .long .Lrnglists_table_base0 # DW_AT_rnglists_base
+ .byte 2 # Abbrev [2] 0x2b:0x37
DW_TAG_subprogram
+ .quad .Lfoo_begin # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfoo_begin # DW_AT_high_pc
+ .long .Lrnglists # DW_AT_name
+ .byte 5 # Abbrev [5] 0x52:0xf
DW_TAG_lexical_block
+ .byte 0 # DW_AT_ranges
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end0:
+
+ .section .debug_rnglists,"",@progbits
+ .long .Ldebug_rnglist_table_end0-.Ldebug_rnglist_table_start0 #
Length
+.Ldebug_rnglist_table_start0:
+ .short 5 # Version
+ .byte 8 # Address size
+ .byte 0 # Segment selector size
+ .long 1 # Offset entry count
+.Lrnglists_table_base0:
+ .long .Ldebug_ranges0-.Lrnglists_table_base0
+.Ldebug_ranges0:
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Lblock1_begin-.Lfoo_begin # starting offset
+ .uleb128 .Lblock1_end-.Lfoo_begin # ending offset
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Lblock2_begin-.Lfoo_begin # starting offset
+ .uleb128 .Lblock2_end-.Lfoo_begin # ending offset
+ .byte 0 # DW_RLE_end_of_list
+.Ldebug_rnglist_table_end0:
+ .section .debug_macinfo,"",@progbits
+ .byte 0 # End Of Macro List Mark
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