HelloService.getValue.c

void * -[HelloService getValue](void * self, void * _cmd) {
    var_18 = [@"Hello thanhvu.dev" retain];
    var_28 = [var_18 retain];
    objc_storeStrong(var_18, 0x0);
    rax = [var_28 autorelease];
    return rax;
}

HelloService.getValue.s

0000000100000e40 55                     push       rbp                          ; Objective C Implementation defined at 0x1000010f8 (instance method), DATA XREF=0x1000010f8
0000000100000e41 4889E5                 mov        rbp, rsp
0000000100000e44 4883EC30               sub        rsp, 0x30
0000000100000e48 48897DF8               mov        qword [rbp+var_8], rdi
0000000100000e4c 488975F0               mov        qword [rbp+var_10], rsi
0000000100000e50 488D3D09020000         lea        rdi, qword [cfstring_Hello_thanhvu_dev] ; @"Hello thanhvu.dev", argument "instance" for method _objc_retain
0000000100000e57 488B35BA010000         mov        rsi, qword [_objc_retain_100001018]
0000000100000e5e 488975E0               mov        qword [rbp+var_20], rsi
0000000100000e62 FFD6                   call       rsi                          ; _objc_retain ; Retain biến s
0000000100000e64 488945E8               mov        qword [rbp+var_18], rax
0000000100000e68 488B7DE8               mov        rdi, qword [rbp+var_18]
0000000100000e6c 488B45E0               mov        rax, qword [rbp+var_20]
0000000100000e70 FFD0                   call       rax
0000000100000e72 31C9                   xor        ecx, ecx
0000000100000e74 89CE                   mov        esi, ecx                     
0000000100000e76 488D7DE8               lea        rdi, qword [rbp+var_18]      
0000000100000e7a 488945D8               mov        qword [rbp+var_28], rax
0000000100000e7e E8A7000000             call       imp___stubs__objc_storeStrong  ; Release biến s
0000000100000e83 488B45D8               mov        rax, qword [rbp+var_28] 			; Lấy địa chỉ vùng nhớ của object mà pointer s trỏ tới
0000000100000e87 4889C7                 mov        rdi, rax                     ; argument "instance" for method imp___stubs__objc_autoreleaseReturnValue
0000000100000e8a 4883C430               add        rsp, 0x30
0000000100000e8e 5D                     pop        rbp
0000000100000e8f E98A000000             jmp        imp___stubs__objc_autoreleaseReturnValue 	; Thực hiện đẩy object của pointer s vào trong autorelease

HelloService.run.c

void -[HelloService run](void * self, void * _cmd) {
    var_18 = [[self getValue] retain];
    var_20 = [var_18 retain];
    NSLog(@"%@", var_18);
    objc_storeStrong(var_20, 0x0);
    objc_storeStrong(var_18, 0x0);
    return;
}

HelloService.run.s

 										-[HelloService run]
0000000100000db0 55                     push       rbp                          ; Objective C Implementation defined at 0x1000010e0 (instance method), DATA XREF=0x1000010e0
0000000100000db1 4889E5                 mov        rbp, rsp
0000000100000db4 4883EC30               sub        rsp, 0x30
0000000100000db8 48897DF8               mov        qword [rbp+var_8], rdi   ; Biến self
0000000100000dbc 488975F0               mov        qword [rbp+var_10], rsi  ; Biến _cmd
0000000100000dc0 488B75F8               mov        rsi, qword [rbp+var_8]
0000000100000dc4 488B3D8D030000         mov        rdi, qword [0x100001158]     ; @selector(getValue)
0000000100000dcb 48897DD8               mov        qword [rbp+var_28], rdi
0000000100000dcf 4889F7                 mov        rdi, rsi                     
0000000100000dd2 488B75D8               mov        rsi, qword [rbp+var_28]      
0000000100000dd6 FF1534020000           call       qword [_objc_msgSend_100001010] ; _objc_msgSend, Ở đây là gọi hàm getValue từ self
0000000100000ddc 4889C7                 mov        rdi, rax                     
0000000100000ddf E840010000             call       imp___stubs__objc_retainAutoreleasedReturnValue  ; ARC thực hiện gọi code retain lại object được return từ [self getValue]
0000000100000de4 488945E8               mov        qword [rbp+var_18], rax		; Kết quả của [self getValue] được lưu tại đây, biến helloString
0000000100000de8 488B45E8               mov        rax, qword [rbp+var_18]
0000000100000dec 4889C7                 mov        rdi, rax                     
0000000100000def FF1523020000           call       qword [_objc_retain_100001018] ; _objc_retain ; Object được retain lại lần nữa
0000000100000df5 488D3544020000         lea        rsi, qword [cfstring___]     ; @"%@"
0000000100000dfc 488945E0               mov        qword [rbp+var_20], rax		; Đây là biến strongRefHelloString, khi gán strongRefHelloString thì ARC tự động gọi retain :D
0000000100000e00 488B45E8               mov        rax, qword [rbp+var_18]
0000000100000e04 4889F7                 mov        rdi, rsi                     ; argument "format" for method imp___stubs__NSLog
0000000100000e07 4889C6                 mov        rsi, rax
0000000100000e0a B000                   mov        al, 0x0
0000000100000e0c E807010000             call       imp___stubs__NSLog
0000000100000e11 31C9                   xor        ecx, ecx
0000000100000e13 89CE                   mov        esi, ecx                     
0000000100000e15 488D7DE0               lea        rdi, qword [rbp+var_20]      
0000000100000e19 E80C010000             call       imp___stubs__objc_storeStrong	; Thực hiện gọi objc_storeStrong(strongRefHelloString, 0x0) để release
0000000100000e1e 31C9                   xor        ecx, ecx
0000000100000e20 89CE                   mov        esi, ecx                     
0000000100000e22 488D7DE8               lea        rdi, qword [rbp+var_18]      
0000000100000e26 E8FF000000             call       imp___stubs__objc_storeStrong 	; Thực hiện gọi objc_storeStrong(helloString, 0x0) để release
0000000100000e2b 4883C430               add        rsp, 0x30
0000000100000e2f 5D                     pop        rbp
0000000100000e30 C3                     ret