WebSVN – HelenOS – Diff – /branches/tracing/kernel/generic/src/proc/task.c

 #include <mm/slab.h>
 #include <atomic.h>
 #include <synch/spinlock.h>
 #include <synch/waitq.h>
 #include <arch.h>
+#include <arch/barrier.h>
 #include <panic.h>
 #include <adt/avl.h>
 #include <adt/btree.h>
 #include <adt/list.h>
 #include <ipc/ipc.h>
             spinlock_unlock(&tasks_lock);
             interrupts_restore(ipl);
 #ifdef CONFIG_DEBUG
-            printf("Killing task %llu\n", id);
+            printf("Killing task %" PRIu64 "\n", id);
 #endif
             task_kill(id);
             thread_usleep(10000);
         } else {
             spinlock_unlock(&tasks_lock);
     free(t);
     TASK = NULL;
+}
-/** Create new task with 1 thread and run it
+/** Syscall for reading task ID from userspace.
+ *
- * @param program_addr Address of program executable image.
+ * @param uspace_task_id Userspace address of 8-byte buffer where to store
- * @param name Program name.
+ * current task ID.
+ *
- * @return Task of the running program or NULL on error.
+ * @return 0 on success or an error code from @ref errno.h.
  */
-task_t *task_run_program(void *program_addr, char *name)
+unative_t sys_task_get_id(task_id_t *uspace_task_id)
+{
-    as_t *as;
+    /*
-    as_area_t *a;
+     * No need to acquire lock on TASK because taskid
-    unsigned int rc;
+     * remains constant for the lifespan of the task.
-    thread_t *t;
+     */
-    task_t *task;
+    return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid,
-    uspace_arg_t *kernel_uarg;
+        sizeof(TASK->taskid));
+}
+unative_t sys_task_spawn(void *image, size_t size)
+{
-    as = as_create(0);
+    void *kimage = malloc(size, 0);
+    if (kimage == NULL)
+        return ENOMEM;
+    int rc = copy_from_uspace(kimage, image, size);
+    if (rc != EOK)
-    ASSERT(as);
+        return rc;
+    /*
-    rc = elf_load((elf_header_t *) program_addr, as);
+     * Not very efficient and it would be better to call it on code only,
-    if (rc != EE_OK) {
+     * but this whole function is a temporary hack anyway and one day it
-        as_destroy(as);
+     * will go in favor of the userspace dynamic loader.
-        return NULL;
-    }
+     */
+    smc_coherence_block(kimage, size);
+    uspace_arg_t *kernel_uarg;
     kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
+    if (kernel_uarg == NULL) {
+        free(kimage);
+        return ENOMEM;
+    }
     kernel_uarg->uspace_entry =
-        (void *) ((elf_header_t *) program_addr)->e_entry;
+        (void *) ((elf_header_t *) kimage)->e_entry;
     kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;
     kernel_uarg->uspace_thread_function = NULL;
     kernel_uarg->uspace_thread_arg = NULL;
     kernel_uarg->uspace_uarg = NULL;
-    task = task_create(as, name);
+    as_t *as = as_create(0);
+    if (as == NULL) {
+        free(kernel_uarg);
-    ASSERT(task);
+        free(kimage);
+        return ENOMEM;
+    }
-    /*
+    unsigned int erc = elf_load((elf_header_t *) kimage, as);
+    if (erc != EE_OK) {
+        as_destroy(as);
-     * Create the data as_area.
+        free(kernel_uarg);
+        free(kimage);
+        return ENOENT;
-     */
+    }
+    as_area_t *area = as_area_create(as,
-    a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,
+        AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,
         LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS,
         AS_AREA_ATTR_NONE, &anon_backend, NULL);
-    /*
-     * Create the main thread.
+    if (area == NULL) {
-     */
+        as_destroy(as);
-    t = thread_create(uinit, kernel_uarg, task, THREAD_FLAG_USPACE,
+        free(kernel_uarg);
-        "uinit", false);
+        free(kimage);
-    ASSERT(t);
+        return ENOMEM;
+    }
+    task_t *task = task_create(as, "app");
+    if (task == NULL) {
-    thread_ready(t);
+        as_destroy(as);
+        free(kernel_uarg);
+        free(kimage);
-    return task;
+        return ENOENT;
-}
+    }
-/** Syscall for reading task ID from userspace.
+    // FIXME: control the capabilities
+    cap_set(task, cap_get(TASK));
- *
- * @param uspace_task_id Userspace address of 8-byte buffer where to store
+    thread_t *thread = thread_create(uinit, kernel_uarg, task,
+        THREAD_FLAG_USPACE, "user", false);
+    if (thread == NULL) {
- * current task ID.
+        task_destroy(task);
- *
+        as_destroy(as);
- * @return 0 on success or an error code from @ref errno.h.
+        free(kernel_uarg);
- */
+        free(kimage);
-unative_t sys_task_get_id(task_id_t *uspace_task_id)
+        return ENOENT;
-{
+    }
-    /*
-     * No need to acquire lock on TASK because taskid
-     * remains constant for the lifespan of the task.
+    thread_ready(thread);
-     */
-    return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid,
-        sizeof(TASK->taskid));
+    return EOK;
+}
 /** Find task structure corresponding to task ID.
+ *
  * The tasks_lock must be already held by the caller of this function
     spinlock_lock(&t->lock);
     uint64_t cycles;
     char suffix;
     order(task_get_accounting(t), &cycles, &suffix);
-    if (sizeof(void *) == 4)
+#ifdef __32_BITS__
-        printf("%-6llu %-10s %-3ld %#10zx %#10zx %9llu%c %7zd %6zd",
+    printf("%-6" PRIu64 " %-10s %-3" PRIu32 " %10p %10p %9" PRIu64
-            t->taskid, t->name, t->context, t, t->as, cycles, suffix,
+        "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles,
-            t->refcount, atomic_get(&t->active_calls));
+        suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls));
-    else
+#endif
+#ifdef __64_BITS__
-        printf("%-6llu %-10s %-3ld %#18zx %#18zx %9llu%c %7zd %6zd",
+    printf("%-6" PRIu64 " %-10s %-3" PRIu32 " %18p %18p %9" PRIu64
-            t->taskid, t->name, t->context, t, t->as, cycles, suffix,
+        "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles,
-            t->refcount, atomic_get(&t->active_calls));
+        suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls));
+#endif
     for (j = 0; j < IPC_MAX_PHONES; j++) {
         if (t->phones[j].callee)
-            printf(" %zd:%#zx", j, t->phones[j].callee);
+            printf(" %d:%p", j, t->phones[j].callee);
+    }
     printf("\n");
     spinlock_unlock(&t->lock);
     return true;
     ipl_t ipl;
     /* Messing with task structures, avoid deadlock */
     ipl = interrupts_disable();
     spinlock_lock(&tasks_lock);
-    if (sizeof(void *) == 4) {
+#ifdef __32_BITS__
-        printf("taskid name       ctx address    as         "
+    printf("taskid name       ctx address    as         "
-            "cycles     threads calls  callee\n");
+        "cycles     threads calls  callee\n");
-        printf("------ ---------- --- ---------- ---------- "
+    printf("------ ---------- --- ---------- ---------- "
-            "---------- ------- ------ ------>\n");
+        "---------- ------- ------ ------>\n");
-    } else {
+#endif
+#ifdef __64_BITS__
-        printf("taskid name       ctx address            as                 "
+    printf("taskid name       ctx address            as                 "
-            "cycles     threads calls  callee\n");
+        "cycles     threads calls  callee\n");
-        printf("------ ---------- --- ------------------ ------------------ "
+    printf("------ ---------- --- ------------------ ------------------ "
-            "---------- ------- ------ ------>\n");
+        "---------- ------- ------ ------>\n");
-    }
+#endif
     avltree_walk(&tasks_tree, task_print_walker, NULL);
     spinlock_unlock(&tasks_lock);
     interrupts_restore(ipl);

Subversion Repositories HelenOS

(root)/branches/tracing/kernel/generic/src/proc/task.c – Rev 3035 → 3424