gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mcexec: add use of MCKERNEL_RLIMIT_STACK

Browse Source 
MCKERNEL_RLIMIT_STACK is a environment variable which
specify RLIMIT_STACK value on McKernel.

syntax: MCKERNEL_RLIMIT_STACK=<cur>,<max>

example: MCKERNEL_RLIMIT_STACK=0x800000,-1
cur=8MiB, max=unlimited
This commit is contained in:
NAKAMURA Gou
2013-10-11 20:32:36 +09:00
parent 4fb6620f3a
commit 3d32350be0
1 changed files with 21 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
executer/user/mcexec.c
View File

@@ -82,6 +82,7 @@ int main_loop(int fd, int cpu, pthread_mutex_t *lock);
static int fd;
static char *altroot;
static const char rlimit_stack_envname[] = "MCKERNEL_RLIMIT_STACK";
struct program_load_desc *load_elf(FILE *fp, char **interp_pathp)
{
@@ -493,6 +494,9 @@ int main(int argc, char **argv)
char *path;
int error;
struct rlimit rlim_stack;
int n;
unsigned long lcur;
unsigned long lmax;
#ifdef USE_SYSCALL_MOD_CALL
__glob_argc = argc;
@@ -570,6 +574,23 @@ int main(int argc, char **argv)
desc->args = args;
//print_flat(args);
p = getenv(rlimit_stack_envname);
if (p) {
n = sscanf(p, "%lx,%lx", &lcur, &lmax);
if (n != 2) {
fprintf(stderr, "Error: Failed to parse %s\n",
rlimit_stack_envname);
return 1;
}
if (lmax > rlim_stack.rlim_max) {
lmax = rlim_stack.rlim_max;
}
if (lcur > lmax) {
lcur = lmax;
}
rlim_stack.rlim_cur = lcur;
rlim_stack.rlim_max = lmax;
}
desc->rlimit_stack_cur = rlim_stack.rlim_cur;
desc->rlimit_stack_max = rlim_stack.rlim_max;