https://bugs.kde.org/show_bug.cgi?id=392855
David Rankin <drankina...@suddenlinkmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|INVALID |---
--- Comment #5 from David Rankin <drankina...@suddenlinkmail.com> ---
But that is what I'm saying, with gcc 7.3 it is still broken with -O0, e.g.
$ gcc -S -O0 -o vgtest_noopt.asm vgtest2.c
$ cat vgtest_noopt.asm
.file "vgtest2.c"
.text
.section .rodata
.LC0:
.string "a: %d\n"
.text
.globl main
.type main, @function
main:
.LFB5:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
subq $16, %rsp
movl $4, %edi
call malloc@PLT
movq %rax, -8(%rbp)
movq -8(%rbp), %rax
movl $5, (%rax)
movq -8(%rbp), %rax
movl (%rax), %eax
movl %eax, %esi
leaq .LC0(%rip), %rdi
movl $0, %eax
call printf@PLT
movq -8(%rbp), %rax
movq %rax, %rdi
call free@PLT
movl $0, %eax
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE5:
.size main, .-main
.ident "GCC: (GNU) 7.3.1 20180406"
.section .note.GNU-stack,"",@progbits
valgrind still reports the wrong memory allocation. This time 1028-bytes
(showing the 4-bytes allocated for the int, but a magic 1024 more)
$ valgrind ./bin/vgtest_noopt
==17950== Memcheck, a memory error detector
==17950== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==17950== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==17950== Command: ./bin/vgtest_noopt
==17950==
a: 5
==17950==
==17950== HEAP SUMMARY:
==17950== in use at exit: 0 bytes in 0 blocks
==17950== total heap usage: 2 allocs, 2 frees, 1,028 bytes allocated
==17950==
==17950== All heap blocks were freed -- no leaks are possible
==17950==
==17950== For counts of detected and suppressed errors, rerun with: -v
==17950== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
Thank you for looking at this.
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