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prevents MCKERNEL_RLIMIT_STACK from overwriting

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When mcexec reduces a stack, mcexec stores the original RLIMIT_STACK
in environment variable MCKERNEL_RLIMIT_STACK.
A fix to prohibit overwrite of this time.

Therefore, the value of RLIMIT_STACK of the McKernel's process is
decided in the following order.
(1) If environment variable MCKERNEL_RLIMIT_STACK exists; the value.
(2) A value of RLIMIT_STACK in the mcexec starting.
This commit is contained in:
NAKAMURA Gou
2013-10-30 12:22:51 +09:00
parent 011ef60c4b
commit a80d11cde5
1 changed files with 2 additions and 2 deletions
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4
executer/user/mcexec.c
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@ -491,8 +491,8 @@ static int reduce_stack(struct rlimit *orig_rlim, char *argv[])
return 1; return 1;
} }
#define ALLOW_OVERWRITE 1 #define DO_NOT_OVERWRITE 0
error = setenv(rlimit_stack_envname, newval, ALLOW_OVERWRITE); error = setenv(rlimit_stack_envname, newval, DO_NOT_OVERWRITE);
if (error) { if (error) {
__eprintf("failed to setenv(%s)\n", rlimit_stack_envname); __eprintf("failed to setenv(%s)\n", rlimit_stack_envname);
return 1; return 1;