The patch titled
Subject: c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat
has been added to the -mm tree. Its filename is
c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat.patch
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------------------------------------------------------
From: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Subject: c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat
We would like to have an ability to restore command line arguments and
program environment pointers but first we need to obtain them somehow.
Thus we put these values into /proc/$pid/stat. The exit_code is needed to
restore zombie tasks.
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Andrew Vagin <avagin@xxxxxxxxxx>
Cc: Vasiliy Kulikov <segoon@xxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 5 +++++
fs/proc/array.c | 20 +++++++++++++++++---
2 files changed, 22 insertions(+), 3 deletions(-)
diff -puN Documentation/filesystems/proc.txt~c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat Documentation/filesystems/proc.txt
--- a/Documentation/filesystems/proc.txt~c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat
+++ a/Documentation/filesystems/proc.txt
@@ -311,6 +311,11 @@ Table 1-4: Contents of the stat files (a
start_data address above which program data+bss is placed
end_data address below which program data+bss is placed
start_brk address above which program heap can be expanded with brk()
+ arg_start address above which program command line is placed
+ arg_end address below which program command line is placed
+ env_start address above which program environment is placed
+ env_end address below which program environment is placed
+ exit_code the thread's exit_code in the form reported by the waitpid system call
..............................................................................
The /proc/PID/maps file containing the currently mapped memory regions and
diff -puN fs/proc/array.c~c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat fs/proc/array.c
--- a/fs/proc/array.c~c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat
+++ a/fs/proc/array.c
@@ -508,9 +508,23 @@ static int do_task_stat(struct seq_file
seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task));
seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime));
seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime));
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_data : 0);
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->end_data : 0);
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_brk : 0);
+
+ if (mm && permitted) {
+ seq_put_decimal_ull(m, ' ', mm->start_data);
+ seq_put_decimal_ull(m, ' ', mm->end_data);
+ seq_put_decimal_ull(m, ' ', mm->start_brk);
+ seq_put_decimal_ull(m, ' ', mm->arg_start);
+ seq_put_decimal_ull(m, ' ', mm->arg_end);
+ seq_put_decimal_ull(m, ' ', mm->env_start);
+ seq_put_decimal_ull(m, ' ', mm->env_end);
+ } else
+ seq_printf(m, " 0 0 0 0 0 0 0");
+
+ if (permitted)
+ seq_put_decimal_ll(m, ' ', task->exit_code);
+ else
+ seq_put_decimal_ll(m, ' ', 0);
+
seq_putc(m, '\n');
if (mm)
mmput(mm);
_
Subject: Subject: c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat
Patches currently in -mm which might be from gorcunov@xxxxxxxxxx are
linux-next.patch
sysctl-make-kernelns_last_pid-control-being-checkpoint_restore-dependent.patch
fs-proc-introduce-proc-pid-task-tid-children-entry-v9.patch
syscalls-x86-add-__nr_kcmp-syscall-v8.patch
syscalls-x86-add-__nr_kcmp-syscall-v8-fix.patch
c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat.patch
c-r-prctl-extend-pr_set_mm-to-set-up-more-mm_struct-entries-v2.patch
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