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| #include <pthread.h> | |
| #include <pthread_np.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <sys/types.h> | |
| #include <sys/time.h> | |
| #include <unistd.h> | |
| #include <sys/resource.h> | |
| #include <sys/sysctl.h> | |
| #include <sys/user.h> | |
| int pipefds[2]; | |
| int (*volatile use_all_stack_fun)(void *limit); | |
| void* (*volatile frame_addr_fun)(void); | |
| static void* frame_addr() { | |
| return __builtin_frame_address(0); | |
| } | |
| static int use_all_stack(void *limit) | |
| { | |
| if (frame_addr_fun() < limit) { | |
| return 1; | |
| } | |
| return 1 + use_all_stack_fun(limit); | |
| } | |
| void *start_routine(void *arg) { | |
| pthread_attr_t attr; | |
| pthread_attr_init(&attr); | |
| void *addr; | |
| size_t size; | |
| size_t guardsize; | |
| use_all_stack_fun = use_all_stack; | |
| frame_addr_fun = frame_addr; | |
| if (pthread_attr_get_np(pthread_self(), &attr)) { | |
| perror("attr_get_np"); | |
| exit(1); | |
| } | |
| if (pthread_attr_getstack(&attr, &addr, &size)) { | |
| perror("getstack"); | |
| exit(1); | |
| } | |
| if (pthread_attr_getguardsize(&attr, &guardsize)) { | |
| perror("getguardsize"); | |
| exit(1); | |
| } | |
| /* Checking that we can actually use stack from addr+size to addr+size */ | |
| void *limit = (char*)addr + 256; | |
| int recur_depth = use_all_stack(limit); | |
| fprintf(stderr, "Thread %zd: stack low: %p; high: %p; size: %zd\n" | |
| " guardsize: %zd (%p->%p)\n" | |
| " frame addr: %p; (%zd from high)\n" | |
| " recursion depth: %d\n", | |
| (uintptr_t) arg, addr, (char*)addr+size, size, | |
| guardsize, (char*)addr-guardsize, addr, | |
| frame_addr(), (size_t)((char*)addr+size-(uintptr_t)frame_addr()), | |
| recur_depth); | |
| write(pipefds[1], ".", 1); | |
| char c; | |
| read(pipefds[1], &c, 1); | |
| fprintf(stderr, "Thread done"); | |
| return NULL; | |
| } | |
| int main() { | |
| pthread_t t1, t2, t3; | |
| pthread_attr_t attr1, attr2, attr3; | |
| if (pipe(pipefds)) { | |
| perror("pipe"); | |
| exit(1); | |
| } | |
| pthread_attr_init(&attr1); | |
| if (pthread_create(&t1, &attr1, &start_routine, (void*)1)) { | |
| perror("pthread_create(t1)"); | |
| exit(1); | |
| } | |
| pthread_attr_init(&attr2); | |
| pthread_attr_setguardsize(&attr2, 1*1024*1024); | |
| pthread_create(&t2, &attr2, start_routine, (void*)2); | |
| pthread_attr_init(&attr3); | |
| pthread_attr_setguardsize(&attr3, 16*1024*1024); | |
| pthread_create(&t3, &attr3, start_routine, (void*)3); | |
| for (int i = 0; i < 3; i++) { | |
| char c; | |
| if (read(pipefds[0], &c, 1) != 1) { | |
| perror("read"); | |
| exit(1); | |
| } | |
| } | |
| char buf[4096]; | |
| sprintf(buf, "procstat vm %d >&2", getpid()); | |
| system(buf); | |
| return 0; | |
| } |
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