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mcexec: Add --stack-premap=<premap_size>[,<max>]

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<premap_size> of stack is pre-mapped on creating a process.
And its max size of stack is set to <max>.
This replaces MCKERNEL_RLIMIT_STACK=<premap_size>,<max>.
This commit is contained in:
Masamichi Takagi
2017-09-26 16:49:40 +09:00
parent c43c1b640a
commit be4d84c0c1
5 changed files with 67 additions and 16 deletions
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11
kernel/process.c
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@@ -2089,15 +2089,16 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
#ifdef POSTK_DEBUG_ARCH_DEP_80 /* user stack prepage size fix */
minsz = LARGE_PAGE_SIZE;
#else /* POSTK_DEBUG_ARCH_DEP_80 */
minsz = (proc->rlimit[MCK_RLIMIT_STACK].rlim_cur
minsz = (pn->stack_premap
+ LARGE_PAGE_SIZE - 1) & LARGE_PAGE_MASK;
#endif /* POSTK_DEBUG_ARCH_DEP_80 */
size = (proc->rlimit[MCK_RLIMIT_STACK].rlim_max
size = (proc->rlimit[MCK_RLIMIT_STACK].rlim_cur
+ LARGE_PAGE_SIZE - 1) & LARGE_PAGE_MASK;
dkprintf("%s: rlim_max: %lu, rlim_cur: %lu\n",
dkprintf("%s: stack_premap: %lu, rlim_cur: %lu, minsz: %lu, size: %lu\n",
__FUNCTION__,
proc->rlimit[MCK_RLIMIT_STACK].rlim_max,
proc->rlimit[MCK_RLIMIT_STACK].rlim_cur);
pn->stack_premap,
proc->rlimit[MCK_RLIMIT_STACK].rlim_cur,
minsz, size);
if (size > (USER_END / 2)) {
size = USER_END / 2;
}