sambuc/codezero
1
0
Fork 0
mirror of https://github.com/drasko/codezero.git synced 2026-01-16 04:43:16 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

clone() call working. Tested exit(), clone() and fork() mixture running about 22 threads, processes.

Browse Source
This commit is contained in:
Bahadir Balban
2008-11-10 17:58:33 +02:00
parent 66388a0fc3
commit 44c34026b2
8 changed files with 68 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
tasks/test0/src/clone.c
View File

@@ -1,42 +0,0 @@
/*
* Clone test.
*/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sched.h>
#include <errno.h>
int my_thread_func(void *arg)
{
printf("Cloned child running...\n");
printf("PID: %d\n", getpid());
_exit(0);
}
int clonetest(void)
{
pid_t childid;
void *child_stack;
if ((child_stack = mmap(0, 0x1000, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_GROWSDOWN, 0, 0)) == MAP_FAILED) {
printf("MMAP failed.\n");
_exit(1);
} else {
printf("Mapped area starting at %p\n", child_stack);
}
((int *)child_stack)[-1] = 5; /* Test mapped area */
printf("Cloning...\n");
if ((childid = clone(my_thread_func, child_stack,
CLONE_PARENT | CLONE_FS | CLONE_VM | CLONE_THREAD | CLONE_SIGHAND, 0)) < 0) {
perror("CLONE failed.\n");
} else {
printf("Cloned a new thread with child pid %d\n", childid);
}
return 0;
}

49
tasks/test0/src/clonetest.c Normal file
View File

@@ -0,0 +1,49 @@
/*
* Clone test.
*/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sched.h>
#include <errno.h>
int clone_global = 0;
int my_thread_func(void *arg)
{
printf("Cloned child %d running...\n", getpid());
for (int i = 0; i < 25; i++)
clone_global++;
printf("Cloned child exiting with global increased to: %d. (Should be just about 100 at final)\n", clone_global);
_exit(0);
}
int clonetest(void)
{
pid_t childid;
void *child_stack;
/* Parent loops and calls clone() to clone new threads. Children don't come back from the clone() call */
for (int i = 0; i < 4; i++) {
if ((child_stack = mmap(0, 0x1000, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_GROWSDOWN, 0, 0)) == MAP_FAILED) {
printf("MMAP failed.\n");
_exit(1);
} else {
printf("Mapped area starting at %p\n", child_stack);
}
((int *)child_stack)[-1] = 5; /* Test mapped area */
printf("Cloning...\n");
if ((childid = clone(my_thread_func, child_stack,
CLONE_PARENT | CLONE_FS | CLONE_VM | CLONE_THREAD | CLONE_SIGHAND, 0)) < 0) {
perror("CLONE failed.\n");
} else {
printf("Cloned a new thread with child pid %d\n", childid);
}
}
_exit(0);
return 0;
}