Messages in this thread Patch in this message | | | From | Pavel Krauz <> | Subject | [PATCH] Re: READ-ONLY mmap not present in core | Date | Tue, 21 Oct 2003 15:43:33 +0200 (CEST) |
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> I have verified that the READ_ONLY mmap mapping of file did not propagate > to core file.
Here goes a patch that solves the problem. The READ_ONLY - only mappings are now included to the core file. The executable regions are still excluded. The size of core did not change a lot and you have all important info in core and don't get unreferencable pointers inside a debugger.
Please apply to 2.4.X and 2.6.X also Pavel
with patch (emacs, netscape, xemacs): 4706304 core.all.emacs 9129984 core.all.netscape 5726208 core.all.xemacs
without patch: 4452352 core.emacs 8851456 core.netscape 5459968 core.xemacs
--- linux/fs/binfmt_elf.c.bak Tue Oct 21 15:21:13 2003 +++ linux/fs/binfmt_elf.c Tue Oct 21 15:21:18 2003 @@ -952,7 +952,7 @@ #if 1 if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN)) return 1; - if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED)) + if (vma->vm_flags & (VM_EXEC|VM_EXECUTABLE)) return 0; #endif return 1;
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