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This commit is contained in:
Masamichi Takagi
2014-09-23 11:12:27 +09:00
committed by Tomoki Shirasawa
parent da17625be9
commit 658b88fd7b
6 changed files with 191 additions and 191 deletions
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1
kernel/host.c
View File

@@ -362,7 +362,6 @@ static int process_msg_prepare_process(unsigned long rphys)
return -ENOMEM;
}
proc->pid = pn->pid;
kprintf("prepare_process,pid=%d,ptrace=%08x\n", proc->pid, proc->ftn->ptrace);
proc->pgid = pn->pgid;
proc->ftn->pid = pn->pid;
proc->vm->region.user_start = pn->user_start;

16
kernel/process.c
View File

@@ -318,8 +318,8 @@ err_free_proc:
}
int ptrace_traceme(void){
struct process *proc = cpu_local_var(current);
struct fork_tree_node *ftn = proc->ftn, *parent;
struct process *proc = cpu_local_var(current);
struct fork_tree_node *ftn = proc->ftn, *parent;
ftn->ptrace = PT_TRACED;
@@ -1952,10 +1952,10 @@ redo:
void check_need_resched(void)
{
struct cpu_local_var *v = get_this_cpu_local_var();
if (v->flags & CPU_FLAG_NEED_RESCHED) {
if (v->flags & CPU_FLAG_NEED_RESCHED) {
v->flags &= ~CPU_FLAG_NEED_RESCHED;
schedule();
}
}
}
@@ -1966,8 +1966,8 @@ int sched_wakeup_process(struct process *proc, int valid_states)
unsigned long irqstate;
struct cpu_local_var *v = get_cpu_local_var(proc->cpu_id);
dkprintf("sched_wakeup_process,proc->pid=%d,valid_states=%08x,proc->status=%08x,proc->cpu_id=%d,my cpu_id=%d\n",
proc->pid, valid_states, proc->status, proc->cpu_id, ihk_mc_get_processor_id());
dkprintf("sched_wakeup_process,proc->pid=%d,valid_states=%08x,proc->status=%08x,proc->cpu_id=%d,my cpu_id=%d\n",
proc->pid, valid_states, proc->status, proc->cpu_id, ihk_mc_get_processor_id());
irqstate = ihk_mc_spinlock_lock(&(proc->spin_sleep_lock));
if (proc->spin_sleep) {
@@ -1982,7 +1982,7 @@ int sched_wakeup_process(struct process *proc, int valid_states)
if (spin_slept) {
return status;
}
}
irqstate = ihk_mc_spinlock_lock(&(v->runq_lock));
@@ -1997,7 +1997,7 @@ int sched_wakeup_process(struct process *proc, int valid_states)
ihk_mc_spinlock_unlock(&(v->runq_lock), irqstate);
if (!status && (proc->cpu_id != ihk_mc_get_processor_id())) {
dkprintf("sched_wakeup_process,issuing IPI,proc->cpu_id=%d\n",
dkprintf("sched_wakeup_process,issuing IPI,proc->cpu_id=%d\n",
proc->cpu_id);
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(proc->cpu_id)->apic_id,
0xd1);

263
kernel/syscall.c
View File

@@ -324,56 +324,57 @@ static int wait_zombie(struct process *proc, struct fork_tree_node *child, int *
return ret;
}
static int wait_stopped(struct process *proc, struct fork_tree_node *child, int *status, int options) {
dkprintf("wait_stopped,proc->pid=%d,child->pid=%d,options=%08x\n",
static int wait_stopped(struct process *proc, struct fork_tree_node *child, int *status, int options)
{
dkprintf("wait_stopped,proc->pid=%d,child->pid=%d,options=%08x\n",
proc->pid, child->pid, options);
int ret;
/* Copy exit_status created in do_signal */
int *exit_status = (child->ptrace & PT_TRACED) ?
&child->exit_status :
&child->group_exit_status;
/* Skip this process because exit_status has been reaped. */
if (!*exit_status) {
ret = 0;
goto out;
}
int ret;
/* TODO: define 0x7f in kernel/include/process.h */
if (status) {
*status = (*exit_status << 8) | 0x7f;
}
/* Reap exit_status. signal_flags is reaped on receiving signal
in do_kill(). */
if(!(options & WNOWAIT)) {
*exit_status = 0;
}
dkprintf("wait_stopped,child->pid=%d,status=%08x\n",
/* Copy exit_status created in do_signal */
int *exit_status = (child->ptrace & PT_TRACED) ?
&child->exit_status :
&child->group_exit_status;
/* Skip this process because exit_status has been reaped. */
if (!*exit_status) {
ret = 0;
goto out;
}
/* TODO: define 0x7f in kernel/include/process.h */
if (status) {
*status = (*exit_status << 8) | 0x7f;
}
/* Reap exit_status. signal_flags is reaped on receiving signal
in do_kill(). */
if(!(options & WNOWAIT)) {
*exit_status = 0;
}
dkprintf("wait_stopped,child->pid=%d,status=%08x\n",
child->pid, status ? *status : -1);
ret = child->pid;
ret = child->pid;
out:
return ret;
return ret;
}
static int wait_continued(struct process *proc, struct fork_tree_node *child, int *status, int options) {
int ret;
if (status) {
*status = 0xffff;
}
int ret;
/* Reap signal_flags */
if(!(options & WNOWAIT)) {
child->signal_flags &= ~SIGNAL_STOP_CONTINUED;
}
if (status) {
*status = 0xffff;
}
dkprintf("wait4,SIGNAL_STOP_CONTINUED,pid=%d,status=%08x\n",
/* Reap signal_flags */
if(!(options & WNOWAIT)) {
child->signal_flags &= ~SIGNAL_STOP_CONTINUED;
}
dkprintf("wait4,SIGNAL_STOP_CONTINUED,pid=%d,status=%08x\n",
child->pid, status ? *status : -1);
ret = child->pid;
return ret;
ret = child->pid;
return ret;
}
/*
@@ -391,92 +392,92 @@ SYSCALL_DECLARE(wait4)
struct waitq_entry waitpid_wqe;
int empty = 1;
dkprintf("wait4,proc->pid=%d,pid=%d\n", proc->pid, pid);
if (options & ~(WNOHANG | WUNTRACED | WCONTINUED)) {
ret = -EINVAL;
goto exit;
}
rescan:
dkprintf("wait4,proc->pid=%d,pid=%d\n", proc->pid, pid);
if (options & ~(WNOHANG | WUNTRACED | WCONTINUED)) {
ret = -EINVAL;
goto exit;
}
rescan:
pid = (int)ihk_mc_syscall_arg0(ctx);
ihk_mc_spinlock_lock_noirq(&proc->ftn->lock);
list_for_each_entry(child_iter, &proc->ftn->children, siblings_list) {
ihk_mc_spinlock_lock_noirq(&child_iter->lock);
if ((pid < 0 && -pid == child_iter->pgid) ||
pid == -1 ||
(pid == 0 && pgid == child_iter->pgid) ||
(pid > 0 && pid == child_iter->pid)) {
empty = 0;
empty = 0;
if(child_iter->status == PS_ZOMBIE) {
ret = wait_zombie(proc, child_iter, status, ctx);
if(ret) {
goto out_found;
}
}
if(child_iter->status == PS_ZOMBIE) {
ret = wait_zombie(proc, child_iter, status, ctx);
if(ret) {
goto out_found;
}
}
if((child_iter->signal_flags & SIGNAL_STOP_STOPPED) &&
(options & WUNTRACED)) {
/* Not ptraced and in stopped state and WUNTRACED is specified */
ret = wait_stopped(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
if((child_iter->signal_flags & SIGNAL_STOP_CONTINUED) &&
(options & WCONTINUED)) {
ret = wait_continued(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
if((child_iter->signal_flags & SIGNAL_STOP_STOPPED) &&
(options & WUNTRACED)) {
/* Not ptraced and in stopped state and WUNTRACED is specified */
ret = wait_stopped(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
if((child_iter->signal_flags & SIGNAL_STOP_CONTINUED) &&
(options & WCONTINUED)) {
ret = wait_continued(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
}
ihk_mc_spinlock_unlock_noirq(&child_iter->lock);
}
list_for_each_entry(child_iter, &proc->ftn->ptrace_children, ptrace_siblings_list) {
ihk_mc_spinlock_lock_noirq(&child_iter->lock);
if ((pid < 0 && -pid == child_iter->pgid) ||
pid == -1 ||
(pid == 0 && pgid == child_iter->pgid) ||
(pid > 0 && pid == child_iter->pid)) {
empty = 0;
empty = 0;
if(child_iter->status == PS_ZOMBIE) {
ret = wait_zombie(proc, child_iter, status, ctx);
if(ret) {
goto out_found;
}
}
if(child_iter->status == PS_ZOMBIE) {
ret = wait_zombie(proc, child_iter, status, ctx);
if(ret) {
goto out_found;
}
}
if(child_iter->status & (PS_STOPPED | PS_TRACED)) {
/* ptraced and in stopped or trace-stopped state */
ret = wait_stopped(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
} else {
/* ptraced and in running or sleeping state */
}
if(child_iter->status & (PS_STOPPED | PS_TRACED)) {
/* ptraced and in stopped or trace-stopped state */
ret = wait_stopped(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
} else {
/* ptraced and in running or sleeping state */
}
if((child_iter->signal_flags & SIGNAL_STOP_CONTINUED) &&
(options & WCONTINUED)) {
ret = wait_continued(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
if((child_iter->signal_flags & SIGNAL_STOP_CONTINUED) &&
(options & WCONTINUED)) {
ret = wait_continued(proc, child_iter, status, options);
if(ret) {
goto out_found;
}
}
}
ihk_mc_spinlock_unlock_noirq(&child_iter->lock);
}
@@ -484,7 +485,7 @@ rescan:
ret = -ECHILD;
goto out_notfound;
}
/* Don't sleep if WNOHANG requested */
if (options & WNOHANG) {
*status = 0;
@@ -493,7 +494,7 @@ rescan:
}
/* Sleep */
dkprintf("wait4,sleeping\n");
dkprintf("wait4,sleeping\n");
waitq_init_entry(&waitpid_wqe, proc);
waitq_prepare_to_wait(&proc->ftn->waitpid_q, &waitpid_wqe, PS_INTERRUPTIBLE);
@@ -505,14 +506,14 @@ rescan:
waitq_finish_wait(&proc->ftn->waitpid_q, &waitpid_wqe);
goto rescan;
exit:
return ret;
return ret;
out_found:
ihk_mc_spinlock_unlock_noirq(&child_iter->lock);
ihk_mc_spinlock_unlock_noirq(&child_iter->lock);
out_notfound:
ihk_mc_spinlock_unlock_noirq(&proc->ftn->lock);
goto exit;
ihk_mc_spinlock_unlock_noirq(&proc->ftn->lock);
goto exit;
}
void
@@ -522,8 +523,8 @@ terminate(int rc, int sig, ihk_mc_user_context_t *ctx)
struct process *proc = cpu_local_var(current);
struct fork_tree_node *ftn = proc->ftn;
struct fork_tree_node *child, *next;
struct process *parent_owner;
int error;
struct process *parent_owner;
int error;
request.number = __NR_exit_group;
request.args[0] = ((rc & 0x00ff) << 8) | (sig & 0xff);
@@ -554,7 +555,7 @@ terminate(int rc, int sig, ihk_mc_user_context_t *ctx)
dkprintf("terminate,ftn->parent->owner->pid=%d\n",
ftn->parent->owner->pid);
ihk_mc_spinlock_lock_noirq(&ftn->lock);
ftn->pid = proc->pid;
ftn->exit_status = ((rc & 0x00ff) << 8) | (sig & 0xff);
@@ -584,7 +585,7 @@ terminate(int rc, int sig, ihk_mc_user_context_t *ctx)
sigchld_parent(ftn->parent->owner, 0);
*/
dkprintf("terminate,klll SIGCHILD,error=%d\n",
error);
error);
}
release_fork_tree_node(ftn->parent);
@@ -605,7 +606,7 @@ terminate(int rc, int sig, ihk_mc_user_context_t *ctx)
void
interrupt_syscall(int pid, int cpuid)
{
dkprintf("interrupt_syscall,target pid=%d,target cpuid=%d\n", pid, cpuid);
dkprintf("interrupt_syscall,target pid=%d,target cpuid=%d\n", pid, cpuid);
ihk_mc_user_context_t ctx;
long lerror;
@@ -1364,7 +1365,8 @@ SYSCALL_DECLARE(arch_prctl)
ihk_mc_syscall_arg1(ctx));
}
static int ptrace_report_exec(struct process *proc) {
static int ptrace_report_exec(struct process *proc)
{
int error = 0;
long rc;
struct siginfo info;
@@ -1382,13 +1384,13 @@ static int ptrace_report_exec(struct process *proc) {
/* Transition process state */
proc->ftn->status = PS_TRACED;
ihk_mc_spinlock_unlock_noirq(&proc->ftn->lock);
/* Signal myself so that my parent can wait for me */
rc = do_kill(proc->ftn->pid, -1, SIGTRAP, &info);
if (rc < 0) {
kprintf("ptrace_report_exec,do_kill failed\n");
}
if (proc->ftn->parent) {
/* kill SIGCHLD */
ihk_mc_spinlock_lock_noirq(&proc->ftn->parent->lock);
@@ -1404,7 +1406,7 @@ static int ptrace_report_exec(struct process *proc) {
}
}
ihk_mc_spinlock_unlock_noirq(&proc->ftn->parent->lock);
/* Wake parent (if sleeping in wait4()) */
waitq_wakeup(&proc->ftn->parent->waitpid_q);
}
@@ -1415,7 +1417,7 @@ out:
SYSCALL_DECLARE(execve)
{
int error;
int error;
long ret;
char *empty_envp[1] = {NULL};
const char *filename = (const char *)ihk_mc_syscall_arg0(ctx);
@@ -1530,10 +1532,10 @@ SYSCALL_DECLARE(execve)
panic("");
}
error = ptrace_report_exec(cpu_local_var(current));
if(error) {
error = ptrace_report_exec(cpu_local_var(current));
if(error) {
kprintf("execve(): ERROR: ptrace_report_exec()\n");
}
}
/* Switch to new execution context */
dkprintf("execve(): switching to new process\n");
@@ -2352,19 +2354,20 @@ SYSCALL_DECLARE(ptrace)
const int pid = (int)ihk_mc_syscall_arg1(ctx);
const long addr = (long)ihk_mc_syscall_arg2(ctx);
const long data = (long)ihk_mc_syscall_arg3(ctx);
int error;
int error;
switch(request) {
case PTRACE_TRACEME:
error = ptrace_traceme();
case PTRACE_KILL:
case PTRACE_CONT:
error = ptrace_wakeup_sig(pid, request, data);
break;
default:
error = 0;
break;
}
switch(request) {
case PTRACE_TRACEME:
error = ptrace_traceme();
break;
case PTRACE_KILL:
case PTRACE_CONT:
error = ptrace_wakeup_sig(pid, request, data);
break;
default:
error = 0;
break;
}
dkprintf("ptrace(%d,%ld,%p,%p): returning %d\n", request, pid, addr, data, error);
return error;