forked from Imagelibrary/binutils-gdb
1d98e564c9
The gcc 4.4.x (and earlier) compilers had the problem that the unwind info in
the epilogue was inaccurate.
In order to work around this in gdb, epilogue unwinders were added with a
higher priority than the dwarf unwinders in the amd64 and i386 targets:
- amd64_epilogue_frame_unwind, and
- i386_epilogue_frame_unwind.
Subsequently, the epilogue unwind info problem got fixed in gcc 4.5.0.
However, the epilogue unwinders prevented gdb from taking advantage of the
fixed epilogue unwind info, so the scope of the epilogue unwinders was
limited, bailing out for gcc >= 4.5.0.
There was no regression test added for this preference scheme, so if we now
declare epilogue unwind info from all gcc versions as trusted, no test will
start failing.
Fix this by adding an amd64 and i386 regression test for this.
I have no gcc 4.4.x lying around, so I fabricated the assembly files by:
- commenting out some .cfi directives to break the epilogue unwind info, and
- hand-editing the producer info to 4.4.7 to activate the fix.
Tested on x86_64-linux, target boards unix/{-m64,-m32}.
263 lines
8.0 KiB
ArmAsm
263 lines
8.0 KiB
ArmAsm
.file "unwind-on-each-insn-foo.c"
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.text
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.Ltext0:
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.globl foo
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.type foo, @function
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foo:
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.LFB0:
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.file 1 "/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c"
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# /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c:20
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.loc 1 20 0
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.cfi_startproc
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# BLOCK 2 seq:0
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# PRED: ENTRY (FALLTHRU)
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pushl %ebp
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.cfi_def_cfa_offset 8
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.cfi_offset 5, -8
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movl %esp, %ebp
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.cfi_def_cfa_register 5
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# /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c:22
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.loc 1 22 0
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nop
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popl %ebp
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.cfi_restore 5
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# .cfi_def_cfa 4, 4
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# SUCC: EXIT [100.0%]
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ret
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.cfi_endproc
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.LFE0:
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.size foo, .-foo
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.globl bar
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.type bar, @function
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bar:
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.LFB1:
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# /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c:26
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.loc 1 26 0
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.cfi_startproc
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# BLOCK 2 seq:0
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# PRED: ENTRY (FALLTHRU)
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pushl %ebp
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.cfi_def_cfa_offset 8
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.cfi_offset 5, -8
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movl %esp, %ebp
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.cfi_def_cfa_register 5
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# /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c:27
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.loc 1 27 0
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pushl 8(%ebp)
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call foo
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addl $4, %esp
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# /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c:28
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.loc 1 28 0
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nop
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leave
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.cfi_restore 5
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# .cfi_def_cfa 4, 4
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# SUCC: EXIT [100.0%]
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ret
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.cfi_endproc
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.LFE1:
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.size bar, .-bar
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.Letext0:
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.section .debug_info,"",@progbits
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.Ldebug_info0:
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.long 0x74 # Length of Compilation Unit Info
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.value 0x4 # DWARF version number
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.long .Ldebug_abbrev0 # Offset Into Abbrev. Section
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.byte 0x4 # Pointer Size (in bytes)
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.uleb128 0x1 # (DIE (0xb) DW_TAG_compile_unit)
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.long .LASF0 # DW_AT_producer: "GNU C11 4.4.7 -m32 -mtune=generic -march=x86-64 -g -fno-stack-protector"
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.byte 0xc # DW_AT_language
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.long .LASF1 # DW_AT_name: "/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c"
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.long .LASF2 # DW_AT_comp_dir: "/home/vries/gdb_versions/devel/build/gdb/testsuite"
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.long .Ltext0 # DW_AT_low_pc
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.long .Letext0-.Ltext0 # DW_AT_high_pc
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.long .Ldebug_line0 # DW_AT_stmt_list
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.uleb128 0x2 # (DIE (0x25) DW_TAG_subprogram)
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# DW_AT_external
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.ascii "bar\0" # DW_AT_name
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.byte 0x1 # DW_AT_decl_file (/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c)
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.byte 0x19 # DW_AT_decl_line
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# DW_AT_prototyped
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.long .LFB1 # DW_AT_low_pc
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.long .LFE1-.LFB1 # DW_AT_high_pc
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.uleb128 0x1 # DW_AT_frame_base
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.byte 0x9c # DW_OP_call_frame_cfa
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# DW_AT_GNU_all_tail_call_sites
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.long 0x47 # DW_AT_sibling
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.uleb128 0x3 # (DIE (0x3a) DW_TAG_formal_parameter)
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.ascii "s\0" # DW_AT_name
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.byte 0x1 # DW_AT_decl_file (/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c)
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.byte 0x19 # DW_AT_decl_line
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.long 0x47 # DW_AT_type
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.uleb128 0x2 # DW_AT_location
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.byte 0x91 # DW_OP_fbreg
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.sleb128 0
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.byte 0 # end of children of DIE 0x25
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.uleb128 0x4 # (DIE (0x47) DW_TAG_pointer_type)
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.byte 0x4 # DW_AT_byte_size
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.long 0x54 # DW_AT_type
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.uleb128 0x5 # (DIE (0x4d) DW_TAG_base_type)
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.byte 0x1 # DW_AT_byte_size
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.byte 0x6 # DW_AT_encoding
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.long .LASF3 # DW_AT_name: "char"
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.uleb128 0x6 # (DIE (0x54) DW_TAG_const_type)
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.long 0x4d # DW_AT_type
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.uleb128 0x7 # (DIE (0x59) DW_TAG_subprogram)
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# DW_AT_external
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.ascii "foo\0" # DW_AT_name
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.byte 0x1 # DW_AT_decl_file (/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c)
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.byte 0x13 # DW_AT_decl_line
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# DW_AT_prototyped
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.long .LFB0 # DW_AT_low_pc
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.long .LFE0-.LFB0 # DW_AT_high_pc
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.uleb128 0x1 # DW_AT_frame_base
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.byte 0x9c # DW_OP_call_frame_cfa
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# DW_AT_GNU_all_call_sites
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.uleb128 0x3 # (DIE (0x6a) DW_TAG_formal_parameter)
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.ascii "s\0" # DW_AT_name
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.byte 0x1 # DW_AT_decl_file (/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c)
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.byte 0x13 # DW_AT_decl_line
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.long 0x47 # DW_AT_type
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.uleb128 0x2 # DW_AT_location
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.byte 0x91 # DW_OP_fbreg
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.sleb128 0
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.byte 0 # end of children of DIE 0x59
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.byte 0 # end of children of DIE 0xb
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.section .debug_abbrev,"",@progbits
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.Ldebug_abbrev0:
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.uleb128 0x1 # (abbrev code)
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.uleb128 0x11 # (TAG: DW_TAG_compile_unit)
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.byte 0x1 # DW_children_yes
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.uleb128 0x25 # (DW_AT_producer)
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.uleb128 0xe # (DW_FORM_strp)
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.uleb128 0x13 # (DW_AT_language)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3 # (DW_AT_name)
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.uleb128 0xe # (DW_FORM_strp)
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.uleb128 0x1b # (DW_AT_comp_dir)
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.uleb128 0xe # (DW_FORM_strp)
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.uleb128 0x11 # (DW_AT_low_pc)
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.uleb128 0x1 # (DW_FORM_addr)
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.uleb128 0x12 # (DW_AT_high_pc)
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.uleb128 0x6 # (DW_FORM_data4)
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.uleb128 0x10 # (DW_AT_stmt_list)
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.uleb128 0x17 # (DW_FORM_sec_offset)
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.byte 0
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.byte 0
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.uleb128 0x2 # (abbrev code)
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.uleb128 0x2e # (TAG: DW_TAG_subprogram)
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.byte 0x1 # DW_children_yes
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.uleb128 0x3f # (DW_AT_external)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.uleb128 0x3 # (DW_AT_name)
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.uleb128 0x8 # (DW_FORM_string)
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.uleb128 0x3a # (DW_AT_decl_file)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3b # (DW_AT_decl_line)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x27 # (DW_AT_prototyped)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.uleb128 0x11 # (DW_AT_low_pc)
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.uleb128 0x1 # (DW_FORM_addr)
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.uleb128 0x12 # (DW_AT_high_pc)
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.uleb128 0x6 # (DW_FORM_data4)
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.uleb128 0x40 # (DW_AT_frame_base)
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.uleb128 0x18 # (DW_FORM_exprloc)
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.uleb128 0x2116 # (DW_AT_GNU_all_tail_call_sites)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.uleb128 0x1 # (DW_AT_sibling)
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.uleb128 0x13 # (DW_FORM_ref4)
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.byte 0
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.byte 0
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.uleb128 0x3 # (abbrev code)
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.uleb128 0x5 # (TAG: DW_TAG_formal_parameter)
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.byte 0 # DW_children_no
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.uleb128 0x3 # (DW_AT_name)
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.uleb128 0x8 # (DW_FORM_string)
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.uleb128 0x3a # (DW_AT_decl_file)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3b # (DW_AT_decl_line)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x49 # (DW_AT_type)
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.uleb128 0x13 # (DW_FORM_ref4)
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.uleb128 0x2 # (DW_AT_location)
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.uleb128 0x18 # (DW_FORM_exprloc)
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.byte 0
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.byte 0
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.uleb128 0x4 # (abbrev code)
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.uleb128 0xf # (TAG: DW_TAG_pointer_type)
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.byte 0 # DW_children_no
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.uleb128 0xb # (DW_AT_byte_size)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x49 # (DW_AT_type)
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.uleb128 0x13 # (DW_FORM_ref4)
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.byte 0
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.byte 0
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.uleb128 0x5 # (abbrev code)
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.uleb128 0x24 # (TAG: DW_TAG_base_type)
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.byte 0 # DW_children_no
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.uleb128 0xb # (DW_AT_byte_size)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3e # (DW_AT_encoding)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3 # (DW_AT_name)
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.uleb128 0xe # (DW_FORM_strp)
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.byte 0
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.byte 0
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.uleb128 0x6 # (abbrev code)
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.uleb128 0x26 # (TAG: DW_TAG_const_type)
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.byte 0 # DW_children_no
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.uleb128 0x49 # (DW_AT_type)
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.uleb128 0x13 # (DW_FORM_ref4)
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.byte 0
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.byte 0
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.uleb128 0x7 # (abbrev code)
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.uleb128 0x2e # (TAG: DW_TAG_subprogram)
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.byte 0x1 # DW_children_yes
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.uleb128 0x3f # (DW_AT_external)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.uleb128 0x3 # (DW_AT_name)
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.uleb128 0x8 # (DW_FORM_string)
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.uleb128 0x3a # (DW_AT_decl_file)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x3b # (DW_AT_decl_line)
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.uleb128 0xb # (DW_FORM_data1)
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.uleb128 0x27 # (DW_AT_prototyped)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.uleb128 0x11 # (DW_AT_low_pc)
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.uleb128 0x1 # (DW_FORM_addr)
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.uleb128 0x12 # (DW_AT_high_pc)
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.uleb128 0x6 # (DW_FORM_data4)
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.uleb128 0x40 # (DW_AT_frame_base)
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.uleb128 0x18 # (DW_FORM_exprloc)
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.uleb128 0x2117 # (DW_AT_GNU_all_call_sites)
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.uleb128 0x19 # (DW_FORM_flag_present)
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.byte 0
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.byte 0
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.byte 0
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.section .debug_aranges,"",@progbits
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.long 0x1c # Length of Address Ranges Info
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.value 0x2 # DWARF Version
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.long .Ldebug_info0 # Offset of Compilation Unit Info
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.byte 0x4 # Size of Address
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.byte 0 # Size of Segment Descriptor
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.value 0 # Pad to 8 byte boundary
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.value 0
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.long .Ltext0 # Address
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.long .Letext0-.Ltext0 # Length
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.long 0
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.long 0
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.section .debug_line,"",@progbits
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.Ldebug_line0:
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.section .debug_str,"MS",@progbits,1
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.LASF0:
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.string "GNU C11 4.4.7 -m32 -mtune=generic -march=x86-64 -g -fno-stack-protector"
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.LASF2:
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.string "/home/vries/gdb_versions/devel/build/gdb/testsuite"
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.LASF1:
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.string "/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/unwind-on-each-insn-foo.c"
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.LASF3:
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.string "char"
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.ident "GCC: (SUSE Linux) 7.5.0"
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.section .note.GNU-stack,"",@progbits
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