xref: /aosp_15_r20/external/elfutils/tests/testfile-dwp-cu-index-overflow.source (revision 7304104da70ce23c86437a01be71edd1a2d7f37e)

# Dummy program that we patch to generate a dwp file with more than 4GB of
# .debug_info.

# Generate 2 dummy files that result in DWARF blocks.
$ for (( i = 1; i <= 2; i++ )); do echo 'constexpr int filler'$i'[] = { 1 };' > filler$i.cc; done
$ g++ -O2 -g -gsplit-dwarf -fdebug-types-section -dA -S filler{1,2}.cc foo.cc bar.cc main.cc
# Patch the DWARF blocks to be 2GB.
$ for (( i = 1; i <= 2; i++ )); do patch -p1 << EOF
--- a/filler$i.s
+++ b/filler$i.s
@@ -7,5 +7,5 @@
 	.section	.debug_info.dwo,"e",@progbits
 .Ldebug_info0:
-	.long	0x49	# Length of Compilation Unit Info
+	.long	0x80000048	# Length of Compilation Unit Info
 	.value	0x5	# DWARF version number
 	.byte	0x5	# DW_UT_split_compile
@@ -51,9 +51,6 @@
 	.long	0x29	# DW_AT_type
 			# DW_AT_const_expr
-	.byte	0x4	# DW_AT_const_value
-	.byte	0x1	# fp or vector constant word 0
-	.byte	0	# fp or vector constant word 1
-	.byte	0	# fp or vector constant word 2
-	.byte	0	# fp or vector constant word 3
+	.long	0x80000000	# DW_AT_const_value
+	.fill	0x80000000
 	.byte	0	# end of children of DIE 0x14
 	.section	.debug_info,"",@progbits
@@ -171,5 +168,5 @@
 	.uleb128 0x19	# (DW_FORM_flag_present)
 	.uleb128 0x1c	# (DW_AT_const_value)
-	.uleb128 0xa	# (DW_FORM_block1)
+	.uleb128 0x4	# (DW_FORM_block4)
 	.byte	0
 	.byte	0
EOF
done
$ for (( i = 1; i <= 2; i++ )); do as filler$i.s -o filler$i.o; done
$ as foo.s -o foo.o
$ as bar.s -o bar.o
$ as main.s -o main.o
$ g++ filler1.o foo.o filler2.o bar.o main.o -o testfile-dwp-5-cu-index-overflow
# -continue-on-cu-index-overflow was added in LLVM 17:
# https://reviews.llvm.org/D144565.
$ llvm-dwp -continue-on-cu-index-overflow filler1.o foo.o filler2.o bar.o main.o -o testfile-dwp-5-cu-index-overflow.dwp

# Same thing for DWARF 4.
$ g++ -O2 -g -gdwarf-4 -gsplit-dwarf -fdebug-types-section -dA -S filler{1,2}.cc foo.cc bar.cc main.cc
$ for (( i = 1; i <= 2; i++ )); do patch -p1 << EOF
--- a/filler$i.s
+++ b/filler$i.s
@@ -6,5 +6,5 @@
 	.section	.debug_info.dwo,"e",@progbits
 .Ldebug_info0:
-	.long	0x48	# Length of Compilation Unit Info
+	.long	0x80000047	# Length of Compilation Unit Info
 	.value	0x4	# DWARF version number
 	.long	.Ldebug_abbrev0	# Offset Into Abbrev. Section
@@ -49,9 +49,6 @@
 	.long	0x28	# DW_AT_type
 			# DW_AT_const_expr
-	.byte	0x4	# DW_AT_const_value
-	.byte	0x1	# fp or vector constant word 0
-	.byte	0	# fp or vector constant word 1
-	.byte	0	# fp or vector constant word 2
-	.byte	0	# fp or vector constant word 3
+	.long	0x80000000	# DW_AT_const_value
+	.fill	0x80000000
 	.byte	0	# end of children of DIE 0xb
 	.section	.debug_info,"",@progbits
@@ -172,5 +169,5 @@
 	.uleb128 0x19	# (DW_FORM_flag_present)
 	.uleb128 0x1c	# (DW_AT_const_value)
-	.uleb128 0xa	# (DW_FORM_block1)
+	.uleb128 0x4	# (DW_FORM_block4)
 	.byte	0
 	.byte	0
EOF
done
$ for (( i = 1; i <= 2; i++ )); do as filler$i.s -o filler$i.o; done
$ as foo.s -o foo.o
$ as bar.s -o bar.o
$ as main.s -o main.o
$ g++ filler1.o foo.o filler2.o bar.o main.o -o testfile-dwp-4-cu-index-overflow
$ llvm-dwp -continue-on-cu-index-overflow filler1.o foo.o filler2.o bar.o main.o -o testfile-dwp-4-cu-index-overflow.dwp