| Issue |
174685
|
| Summary |
[clang] Differential behavior in rodate between clang and gcc
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
hutoushayu
|
example:
`
#include <stdio.h>
void fun01(void)
{
printf("###fun01###\n");
}
void fun02_1(void)
{
printf("###fun02###\n");
}
void fun02_2(void)
{
printf("###fun02###\n");
}
__attribute__((section(".sec03"),noinline))
void fun03(void)
{
printf("###fun03###\n");
}
__attribute__((section(".text"),noinline))
void fun04(void)
{
printf("###fun04###\n");
}
__attribute__((section(".text.sec05"),noinline))
void fun05(void)
{
printf("###fun05###\n");
}
__attribute__((section(".sec06_1"),noinline))
void fun06_1(void)
{
printf("###fun06###\n");
}
__attribute__((section(".sec06_1"),noinline))
void fun06_2(void)
{
printf("###fun06###\n");
}
__attribute__((section(".text.sec07_1"),noinline))
void fun07_1(void)
{
printf("###fun07###\n");
}
__attribute__((section(".text.sec07_2"),noinline))
void fun07_2(void)
{
printf("###fun07###\n");
}
`
version of clang : llvm-20.1.3
version of gcc: gcc-14.3.0
compiler and read section headers:
$clang demo01.c -ffunction-sections -fdata-sections -O2 -c -o demo01-clang.o
$gcc demo01.c -ffunction-sections -fdata-sections -O2 -c -o demo01-gcc.o
$readelf -SW demo01-gcc.o demo01-clang.o
To compare these section headers,we'll see gcc has generated additional sections :
.rodata.fun01.str1
.rodata.fun02_1.str1
.rodata.sec05.str1
.rodata.sec07_1.str1
Strings in functions were placed in separate segments.
But clang do not.
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