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Re: more readable format for gpp -S


From: Grizlyk
Subject: Re: more readable format for gpp -S
Date: Mon, 12 Feb 2007 04:39:54 +0300

FÖLDY Lajos wrote:
>
> 'gpp -S -fverbose-asm test.cpp' (adds variable names) or
> 'gpp -c -g test.cpp && objdump -S -d -l test.o' (adds source lines)
>

It makes strange output. Some parts of output contain only source without
code

int     main()
{
try{

Ta_ptr  tmp;

    tmp=new char[100];
    #ifdef MY_DBG
    printf("%p->%p\n",&tmp, tmp(0) );
    #endif
...

but late placed code with links to corect lines, without source and external
names

00000180 <_main>:
main():
test.cpp:206 (this is "int     main()")
 180: 8d 4c 24 04           lea    0x4(%esp),%ecx
 184: 83 e4 f0              and    $0xfffffff0,%esp
 187: ff 71 fc              pushl  0xfffffffc(%ecx)
 18a: 55                    push   %ebp
 18b: 89 e5                 mov    %esp,%ebp
 18d: 56                    push   %esi
 18e: 53                    push   %ebx
 18f: 51                    push   %ecx
 190: 83 ec 1c              sub    $0x1c,%esp
test.cpp:210 (this is "tmp=new char[100];")
 193: 83 ec 08              sub    $0x8,%esp
 196: 6a 00                 push   $0x0
 198: 8d 45 e4              lea    0xffffffe4(%ebp),%eax
 19b: 50                    push   %eax
 19c: e8 5f fe ff ff        call   0 <.text>

(no extern name given - 0 <.text>)

...


There are some troubles
1. no extern name given
2. hard to filter the output from useless copy of sources

Probably 'gpp -c -g test.cpp && objdump -S -d -l test.o' works only for C 
functions, not for C++.

-- 
Maksim A. Polyanin





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