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fix PTRACE_O_TRACEFORK, PTRACE_O_TRACEVFORK and PTRACE_O_TRACECLONE.

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allocate debug registers area, for new process.
(gdb testsuite gdb.base/inferior-died.exp)

refs #266
refs #372
This commit is contained in:
Susumu Komae
2015-02-18 16:20:23 +09:00
committed by postpeta
parent 3b04043f2a
commit 2baf274dac
1 changed files with 5 additions and 2 deletions
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7
kernel/syscall.c
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@ -99,6 +99,7 @@ extern unsigned long do_kill(int pid, int tid, int sig, struct siginfo *info, in
int copy_from_user(struct process *, void *, const void *, size_t); int copy_from_user(struct process *, void *, const void *, size_t);
int copy_to_user(struct process *, void *, const void *, size_t); int copy_to_user(struct process *, void *, const void *, size_t);
void do_setpgid(int, int); void do_setpgid(int, int);
extern long alloc_debugreg(struct process *proc);
int prepare_process_ranges_args_envs(struct process *proc, int prepare_process_ranges_args_envs(struct process *proc,
struct program_load_desc *pn, struct program_load_desc *pn,
@ -1550,6 +1551,10 @@ static int ptrace_report_clone(struct process *proc, struct process *new, int ev
new->ftn->ptrace = proc->ftn->ptrace; new->ftn->ptrace = proc->ftn->ptrace;
new->ftn->ppid_parent = new->ftn->parent; /* maybe proc */ new->ftn->ppid_parent = new->ftn->parent; /* maybe proc */
if ((new->ftn->ptrace & PT_TRACED) && new->ptrace_debugreg == NULL) {
alloc_debugreg(new);
}
ihk_mc_spinlock_lock_noirq(&new->ftn->parent->lock); ihk_mc_spinlock_lock_noirq(&new->ftn->parent->lock);
list_for_each_entry_safe(child, next, &new->ftn->parent->children, siblings_list) { list_for_each_entry_safe(child, next, &new->ftn->parent->children, siblings_list) {
if(child == new->ftn) { if(child == new->ftn) {
@ -2855,8 +2860,6 @@ out:
return ret; return ret;
} }
extern long alloc_debugreg(struct process *proc);
static int ptrace_attach(int pid) static int ptrace_attach(int pid)
{ {
int error = 0; int error = 0;