Hello all
I have stupid question regarding constructors and destructors in c++.
After compilation there are two assembler functions (__ZN4testC2Ev,
__ZN4testC1Ev)
that represent constructor, same is for destructors (__ZN4testD2Ev,
__ZN4testD1Ev).
Functions are completely the same.
What is the reason for such compilere behaviour?
Here is small sample:
class test
{
public:
test();
~test();
};
test::test()
{
}
test::~test()
{
}
Here is output after objdump:
SYMBOL TABLE:
[ 2](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 1) 0x00000000 __ZN4testC2Ev
[ 4](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x00000006 __ZN4testC1Ev
[ 5](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x0000000c __ZN4testD2Ev
[ 6](sec 1)(fl 0x00)(ty 20)(scl 2) (nx 0) 0x00000012 __ZN4testD1Ev
....
Disassembly of section .text:
00000000 <__ZN4testC2Ev>:
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 5d pop %ebp
4: c3 ret
5: 90 nop
00000006 <__ZN4testC1Ev>:
6: 55 push %ebp
7: 89 e5 mov %esp,%ebp
9: 5d pop %ebp
a: c3 ret
b: 90 nop
0000000c <__ZN4testD2Ev>:
c: 55 push %ebp
d: 89 e5 mov %esp,%ebp
f: 5d pop %ebp
10: c3 ret
11: 90 nop
00000012 <__ZN4testD1Ev>:
12: 55 push %ebp
13: 89 e5 mov %esp,%ebp
15: 5d pop %ebp
16: c3 ret
Thanks in advanced
Mile
