| Summary: | [3.4/4.0 Regression] Constructors invoking priority problem | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Krzysztof Czyz <kczyz> |
| Component: | c++ | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED INVALID | ||
| Severity: | normal | CC: | gcc-bugs |
| Priority: | P2 | Keywords: | wrong-code |
| Version: | 3.4.0 | ||
| Target Milestone: | 3.4.0 | ||
| Host: | i686-pc-cygwin | Target: | arm-elf |
| Build: | Known to work: | 3.3.3 | |
| Known to fail: | 3.4.0 4.0.0 | Last reconfirmed: | |
We cannot do anything without a testcase. Can you supply one besides say download eCOS. (In reply to comment #1) > We cannot do anything without a testcase. Can you supply one besides say download eCOS. I can supply compiled only; do not assembled files generated using GCC3.4 and GCC3.2. Problem is with (init_priority) atribute, it doesn't work correcly. I think that problem is with generated function name (_ZN12Cyg_Mempolt2I35Cyg_Mempool_dlmalloc_ImplementationEC1EPhij) vs (Z41__static_initialization_and_destruction_0ii) in GCC3.2 GCC3.2: ------- .file "heaps.cxx" .section .debug_abbrev,"",%progbits .Ldebug_abbrev0: .section .debug_info,"",%progbits .Ldebug_info0: .section .debug_line,"",%progbits .Ldebug_line0: .text .Ltext0: .global cygmem_pool_heap1 .section .bss.cygmem_pool_heap1,"aw",%nobits .global cygmem_pool_heap1 .align 2 .type cygmem_pool_heap1,object .size cygmem_pool_heap1,1044 cygmem_pool_heap1: .space 1044 .global cygmem_memalloc_heaps .section .data.cygmem_memalloc_heaps,"aw",%progbits .align 2 .type cygmem_memalloc_heaps,object .size cygmem_memalloc_heaps,8 cygmem_memalloc_heaps: .word cygmem_pool_heap1 .word 0 .section .text._Z41__static_initialization_and_destruction_0ii,"ax",% progbits .align 2 .type _Z41__static_initialization_and_destruction_0ii,function _Z41__static_initialization_and_destruction_0ii: .LFB1: .LSM0: @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp .LCFI0: stmfd sp!, {r4, r5, r6, fp, ip, lr, pc} .LCFI1: ... GCC3.4: ------- .file "heaps.cxx" .section .debug_abbrev,"",%progbits .Ldebug_abbrev0: .section .debug_info,"",%progbits .Ldebug_info0: .section .debug_line,"",%progbits .Ldebug_line0: .text .Ltext0: .section .ctors,"aw",%progbits .align 2 .word _GLOBAL__I_cygmem_pool_heap1 .section .dtors,"aw",%progbits .align 2 .word _GLOBAL__D_cygmem_pool_heap1 .global cygmem_memalloc_heaps .section .data.cygmem_memalloc_heaps,"aw",%progbits .align 2 .type cygmem_memalloc_heaps, %object .size cygmem_memalloc_heaps, 8 cygmem_memalloc_heaps: .word cygmem_pool_heap1 .word 0 .global cygmem_pool_heap1 .section .bss.cygmem_pool_heap1,"aw",%nobits .align 2 .type cygmem_pool_heap1, %object .size cygmem_pool_heap1, 1044 cygmem_pool_heap1: .space 1044 .section .gnu.linkonce.t. _ZN12Cyg_Mempolt2I35Cyg_Mempool_dlmalloc_ImplementationEC1EPhij,"ax",%progbits .align 2 .weak _ZN12Cyg_Mempolt2I35Cyg_Mempool_dlmalloc_ImplementationEC1EPhij .type _ZN12Cyg_Mempolt2I35Cyg_Mempool_dlmalloc_ImplementationEC1EPhij, % function _ZN12Cyg_Mempolt2I35Cyg_Mempool_dlmalloc_ImplementationEC1EPhij: .LFB185: .file 1 "/ecos-c/Arm/System/ecos-ram-eb40a_install/include/cyg/memalloc/mempolt2.inl" .loc 1 73 0 @ args = 0, pretend = 0, frame = 0 @ frame_needed = 1, uses_anonymous_args = 0 mov ip, sp .LCFI0: stmfd sp!, {r4, fp, ip, lr, pc} .LCFI1: >We cannot do anything without a testcase. Can you supply one besides say
>download eCOS
There is testcase:
---------------------
#include <iostream>
struct P
{
P (int i) { std::cout << "Doing " << i << std::endl; }
};
static P first(900) __attribute__ ((init_priority (900)));
static P second(300) __attribute__ ((init_priority (300)));
static P third(3) __attribute__ ((init_priority (3)));
int main ()
{
std::cout << "Blah." << std::endl;
return 0;
}
C>arm-elf-g++ test.cxx
test.cxx:10: warning: attributes after parenthesized initializer ignored
test.cxx:11: warning: attributes after parenthesized initializer ignored
test.cxx:12: warning: attributes after parenthesized initializer ignored
So attributes are ignored, should they be ignored or not?
This works though (but does not compile with anything before 3.4.0):
#include <iostream>
#include <stdio.h>
struct P
{
P (int i) { printf("Doing %d\n", i ); }
};
static P first __attribute__ ((init_priority (900))) (900) ;
static P second __attribute__ ((init_priority (300))) (300);
static P third __attribute__ ((init_priority (200))) (3);
int main ()
{
std::cout << "Blah." << std::endl;
return 0;
}
>This works though (but does not compile with anything before 3.4.0)
Yes, but why GCC3.4 doesn't suport old way of defining attributes ????
The change to ignore the attributes was intentional. See a message I posted to the mailing lists on 2002-08-13: http://gcc.gnu.org/ml/gcc/2002-08/msg00792.html |
Compiling eCOS, compilation succesful, but one of the constructors is invoked in wrong order (Cyg_Mempool_dlmalloc cygmem_pool_heap1), the same code compiled uing GCC3.2 constructors invoked in right order. >arm-elf-gcc -v Reading specs from /ecos-e/Tools/arm-elf-cygwin/bin/../lib/gcc/arm-elf/3.4.0/spe cs Configured with: /c/Src/gcc-3.4-20040215/configure --target=arm-elf --prefix=/c/ gnutools.arm --enable-languages=c,c++ --with-gnu-as --with-gnu-ld --with-newlib --with-gxx-include-dir=/gnutools.arm/arm-elf/include -v : (reconfigured) /c/Src/ gcc-3.4-20040215/configure --target=arm-elf --prefix=/c/gnutools.arm --enable-la nguages=c,c++ --with-gnu-as --with-gnu-ld --with-newlib --with-gxx-include-dir=/ gnutools.arm/arm-elf/include -v Thread model: single gcc version 3.4.0 20040216 (prerelease) How-To-Repeat: Try to compile the eCOS kernel using GCC3.4.