ELF Binary Comparison

Overview

Binaries
Resource Consumption
Symbols
- Persisting
- Disappeared
- Appeared
- Similar
- Migrated

Binaries ↩

old: ../../tests/x86_64/libelf_diff_test_debug_old.a (debug)

new: ../../tests/x86_64/libelf_diff_test_debug_new.a (debug)

Statistics ↩

Program Storage

	Old/bytes	New/bytes	Delta/bytes
overall	329	331	2
text	321	323	2
data	8	8	0

Static RAM

	Old/bytes	New/bytes
overall	8	8
data	8	8
bss	0	0

Legend

text	instructions
data	initialized global or static variables
bss	uninitialized global or static variables

Symbol Classes

Class	Entities
Old	7
New	7
Persisting	3
Disappeared	4
Appeared	4
Similar	10
Migrated	3

Symbol Selection

	Old Binary	New Binary
Total	7	7
Selected	7	7
Dropped	0	0
Selection Regex	.*	.*
Exclusion Regex

Symbols ↩

Persisting Symbols ↩

Symbol	Type	Old Size/bytes	New Size/bytes
persisting1(int) ⓘ	T	18	18
persisting2(int) ⓘ	T	18	18
var	D	4	4

Columns

Symbol	The symbol name (possibly mangled)
Type	The symbol type (see the documentation of binutils tool nm for more information)
Old Size	The old symbol size either in RAM or program memory
New Size	The new symbol size either in RAM or program memory
Delta	The change to symbol size

Disappeared Symbols ↩

Symbol	Type	Size/bytes
Test::g(float, float) ⓘ	T	29
Test::f(int, int) ⓘ	T	21
func(int) ⓘ	T	18
Test::m_	D	4

Columns

Symbol	The symbol name (possibly demangled)
Type	The symbol type (see the documentation of binutils tool nm for more information)
Size	The symbol size either in RAM or program memory

New Symbols ↩

Symbol	Type	Size/bytes
Test1::g(float, float) ⓘ	T	29
Test1::f(int, int) ⓘ	T	21
func(double) ⓘ	T	20
Test1::m_	D	4

Columns

Symbol	The symbol name (possibly demangled)
Type	The symbol type (see the documentation of binutils tool nm for more information)
Size	The symbol size either in RAM or program memory

Similar Symbols ↩

Id	Symbols	Types	Sizes/bytes	Deltas/bytes	Sig. Sim./%	Instr. Sim./%
0 ⓘ	Test::f(int, int) Test1::f(int, int)	T T	21 21	0	88.9	100.0
1 ⓘ	Test::g(float, float) Test1::g(float, float)	T T	29 29	0	88.9	100.0
2	Test::m_ Test1::m_	D D	4 4	0	88.0	100.0
3 ⓘ	func(int) func(double)	T T	18 20	2	87.5	93.1
4	Test::f(int, int) Test1::m_	T D	21 4	-17	69.2	0.0
5	Test::g(float, float) Test1::m_	T D	29 4	-25	69.2	0.0
6 ⓘ	Test::f(int, int) Test1::g(float, float)	T T	21 29	8	66.7	81.4
7 ⓘ	Test::g(float, float) Test1::f(int, int)	T T	29 21	-8	66.7	81.4
8	Test::m_ Test1::g(float, float)	D T	4 29	25	61.5	0.0
9	Test::m_ Test1::f(int, int)	D T	4 21	17	61.5	0.0

Columns

ID	Integer id assigned to each symbol pair
Symbols	The two similar symbol names (possibly mangled)
Types	The symbol types (see the documentation of binutils tool nm for more information)
Sizes	The sizes of the symbols either in RAM or program memory
Deltas	The difference in symbol size
Sig. Sim.	Lexicographic symbol signature similarity
Instr. Sim.	Instruction similarity of the symbols' assembly code

Migrated Symbols ↩

Symbol	Old Source Location	New Source Location
persisting1(int) ⓘ	/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:42	/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:42
persisting2(int) ⓘ	/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:43	/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:43
var	/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:24	/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:24

Please Note: Use the settings source_prefix, old_source_prefix or new_source_prefix to eliminate false positives by removing path prefix from source file paths.

Columns

Symbol	The symbol name (possibly mangled)
Old Source Location	The old source file location [file:line]
New Source Location	The new source file location [file:line]

Symbol Details ↩

Persisting Symbols ↩

Persisting symbol persisting1(int) : old size: 18 bytes, new size: 18 bytes, delta: 0 bytes

Old source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:42
New source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:42

	Old			New
f	1	endbr64	f	1	endbr64
	2	push %rbp		2	push %rbp
	3	mov %rsp,%rbp		3	mov %rsp,%rbp
	4	mov %edi,-0x4(%rbp)		4	mov %edi,-0x4(%rbp)
t	5	mov $0x2b,%eax	t	5	mov $0x2a,%eax
	6	pop %rbp		6	pop %rbp
	7	ret		7	ret
	8			8

Persisting symbol persisting2(int) : old size: 18 bytes, new size: 18 bytes, delta: 0 bytes

Old source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:43
New source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:43

	Old			New
f	1	endbr64	f	1	endbr64
	2	push %rbp		2	push %rbp
	3	mov %rsp,%rbp		3	mov %rsp,%rbp
	4	mov %edi,-0x4(%rbp)		4	mov %edi,-0x4(%rbp)
t	5	mov $0x2b,%eax	t	5	mov $0x2a,%eax
	6	pop %rbp		6	pop %rbp
	7	ret		7	ret
	8			8

Disappeared Symbols ↩

Disappeared symbol func(int) : size: 18 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:20

endbr64
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    $0x2a,%eax
pop    %rbp
ret

Disappeared symbol Test::f(int, int) : size: 21 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:37

endbr64
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    $0x2a,%eax
pop    %rbp
ret
nop

Disappeared symbol Test::g(float, float) : size: 29 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:38

endbr64
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
movss  %xmm0,-0xc(%rbp)
movss  %xmm1,-0x10(%rbp)
mov    $0x1,%eax
pop    %rbp
ret

New Symbols ↩

Appeared symbol func(double) : size: 20 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:20

endbr64
push   %rbp
mov    %rsp,%rbp
movsd  %xmm0,-0x8(%rbp)
mov    $0x2a,%eax
pop    %rbp
ret

Appeared symbol Test1::f(int, int) : size: 21 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:37

endbr64
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    $0x2a,%eax
pop    %rbp
ret
nop

Appeared symbol Test1::g(float, float) : size: 29 bytes

Source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:38

endbr64
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
movss  %xmm0,-0xc(%rbp)
movss  %xmm1,-0x10(%rbp)
mov    $0x1,%eax
pop    %rbp
ret

Similar Symbols ↩

Similar pair 0 : old size: 21 bytes, new size: 21 bytes, delta: 0 bytes, sig. sim.: 88.9 %, instr. sim.: 100.0 %

Old: Test::f(int, int) [/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:37]
New: Test1::f(int, int) [/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:37]

Instructions unchanged

Similar pair 1 : old size: 29 bytes, new size: 29 bytes, delta: 0 bytes, sig. sim.: 88.9 %, instr. sim.: 100.0 %

Old: Test::g(float, float) [/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:38]
New: Test1::g(float, float) [/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:38]

Instructions unchanged

Similar pair 3 : old size: 18 bytes, new size: 20 bytes, delta: 2 bytes, sig. sim.: 87.5 %, instr. sim.: 93.1 %

Old: func(int) [/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:20]
New: func(double) [/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:20]

	Old			New
f	1	endbr64	f	1	endbr64
	2	push %rbp		2	push %rbp
	3	mov %rsp,%rbp		3	mov %rsp,%rbp
t	4	mov %edi,-0x4(%rbp)	t	4	movsd %xmm0,-0x8(%rbp)
	5	mov $0x2a,%eax		5	mov $0x2a,%eax
	6	pop %rbp		6	pop %rbp
	7	ret		7	ret
	8			8

Similar pair 6 : old size: 21 bytes, new size: 29 bytes, delta: 8 bytes, sig. sim.: 66.7 %, instr. sim.: 81.4 %

Old: Test::f(int, int) [/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:37]
New: Test1::g(float, float) [/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:38]

	Old			New
f	1	endbr64	f	1	endbr64
	2	push %rbp		2	push %rbp
	3	mov %rsp,%rbp		3	mov %rsp,%rbp
n	4	mov %edi,-0x4(%rbp)	n	4	mov %rdi,-0x8(%rbp)
	5	mov %esi,-0x8(%rbp)		5	movss %xmm0,-0xc(%rbp)
				6	movss %xmm1,-0x10(%rbp)
	6	mov $0x2a,%eax		7	mov $0x1,%eax
	7	pop %rbp		8	pop %rbp
	8	ret		9	ret
t	9	nop	t
	10			10

Similar pair 7 : old size: 29 bytes, new size: 21 bytes, delta: -8 bytes, sig. sim.: 66.7 %, instr. sim.: 81.4 %

Old: Test::g(float, float) [/home/flo/Tmp/elf_diff/testing/src/old/test.cpp:38]
New: Test1::f(int, int) [/home/flo/Tmp/elf_diff/testing/src/new/test.cpp:37]

	Old			New
f	1	endbr64	f	1	endbr64
	2	push %rbp		2	push %rbp
	3	mov %rsp,%rbp		3	mov %rsp,%rbp
n	4	mov %rdi,-0x8(%rbp)	n	4	mov %edi,-0x4(%rbp)
	5	movss %xmm0,-0xc(%rbp)		5	mov %esi,-0x8(%rbp)
	6	movss %xmm1,-0x10(%rbp)
	7	mov $0x1,%eax		6	mov $0x2a,%eax
	8	pop %rbp		7	pop %rbp
	9	ret		8	ret
t			t	9	nop
	10			10

Migrated Symbols ↩

Migrated symbol persisting1(int) : old size: 18 bytes, new size: 18 bytes, delta: 0 bytes

Old source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:42
New source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:42

Migrated symbol persisting2(int) : old size: 18 bytes, new size: 18 bytes, delta: 0 bytes

Old source: /home/flo/Tmp/elf_diff/testing/src/old/test.cpp:43
New source: /home/flo/Tmp/elf_diff/testing/src/new/test.cpp:43