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Continue thread properly taking into account suspend_count

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This commit is contained in:
Derek Parker 2015-03-07 18:21:10 -06:00
parent 0660fcc09b
commit 11405314d8
3 changed files with 23 additions and 7 deletions
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18
proctl/threads_darwin.c
View File

@ -74,8 +74,22 @@ single_step(thread_act_t thread) {
kret = thread_set_state(thread, x86_THREAD_STATE64, (thread_state_t)&regs, count);
if (kret != KERN_SUCCESS) return kret;
// Continue here until we've fully decremented suspend_count
for (;;) {
kret = resume_thread(thread);
if (kret != KERN_SUCCESS) return kret;
return KERN_SUCCESS;
}
kern_return_t
resume_thread(thread_act_t thread) {
kern_return_t kret;
struct thread_basic_info info;
unsigned int info_count = THREAD_BASIC_INFO_COUNT;
kret = thread_info((thread_t)thread, THREAD_BASIC_INFO, (thread_info_t)&info, &info_count);
if (kret != KERN_SUCCESS) return kret;
for (int i = 0; i < info.suspend_count; i++) {
kret = thread_resume(thread);
if (kret != KERN_SUCCESS) break;
}

7
proctl/threads_darwin.go
View File

@ -38,10 +38,9 @@ func (t *ThreadContext) resume() error {
if PtraceCont(t.Process.Pid, 0) == nil {
return nil
}
for {
if C.thread_resume(t.os.thread_act) != C.KERN_SUCCESS {
break
}
kret := C.resume_thread(t.os.thread_act)
if kret != C.KERN_SUCCESS {
return fmt.Errorf("could not continue thread")
}
return nil
}

5
proctl/threads_darwin.h
View File

@ -19,4 +19,7 @@ kern_return_t
single_step(thread_act_t);
kern_return_t
clear_trap_flag(thread_act_t thread);
clear_trap_flag(thread_act_t);
kern_return_t
resume_thread(thread_act_t);