This patch enables to omit anonymous shared memory from an ELF
formatted core file when it is generated.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
---
fs/binfmt_elf.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
Index: linux-2.6.20-mm2/fs/binfmt_elf.c
===================================================================
--- linux-2.6.20-mm2.orig/fs/binfmt_elf.c
+++ linux-2.6.20-mm2/fs/binfmt_elf.c
@@ -1191,9 +1191,15 @@ static int maydump(struct vm_area_struct
if (vma->vm_flags & (VM_IO | VM_RESERVED))
return 0;
- /* Dump shared memory only if mapped from an anonymous file. */
- if (vma->vm_flags & VM_SHARED)
- return vma->vm_file->f_path.dentry->d_inode->i_nlink == 0;
+ /*
+ * Dump shared memory only if mapped from an anonymous file and
+ * /proc/<pid>/coredump_omit_anonymous_shared flag is not set.
+ */
+ if (vma->vm_flags & VM_SHARED) {
+ if (vma->vm_file->f_path.dentry->d_inode->i_nlink)
+ return 0;
+ return vma->vm_mm->coredump_omit_anon_shared == 0;
+ }
/* If it hasn't been written to, don't write it out */
if (!vma->anon_vma)
-
