Skip to content

X
xv6-public
提交 c2da23f1 创建 作者: Nickolai Zeldovich's avatar Nickolai Zeldovich
浏览文件
操作

make finishproc the opposite of proc::alloc

hopefully this fixes the filetable 0x..08 corruption bug
上级 e9ed7152
隐藏空白字符变更
内嵌 并排
正在显示 包含 19 行增加 和 10 行删除
include/kernel.hh
浏览文件 @ c2da23f1
......@@ -164,7 +164,7 @@ int pipewrite(struct pipe*, const char*, int);
// proc.c
struct proc* copyproc(struct proc*);
void finishproc(struct proc*);
void finishproc(struct proc*, bool removepid = true);
void exit(void);
int fork(int);
int growproc(int);
......
kernel/proc.cc
浏览文件 @ c2da23f1
......@@ -354,10 +354,10 @@ fork(int flags)
throw_bad_alloc();
auto proc_cleanup = scoped_cleanup([&np]() {
if (!xnspid->remove(np->pid, &np))
panic("fork: ns_remove");
freeproc(np);
});
if (!xnspid->remove(np->pid, &np))
panic("fork: ns_remove");
freeproc(np);
});
if(flags & FORK_SHARE_VMAP) {
np->vmap = myproc()->vmap;
......@@ -400,8 +400,10 @@ fork(int flags)
}
void
finishproc(struct proc *p)
finishproc(struct proc *p, bool removepid)
{
if (removepid && !xnspid->remove(p->pid, &p))
panic("finishproc: ns_remove");
if (p->vmap != nullptr)
p->vmap->decref();
if (p->uwq != nullptr)
......@@ -444,6 +446,7 @@ wait(void)
assert(w);
w->rip = (void*) finishproc;
w->arg0 = p;
w->arg1 = 0;
assert(wqcrit_push(w, p->run_cpuid_) >= 0);
return pid;
......@@ -481,18 +484,24 @@ threadalloc(void (*fn)(void *), void *arg)
p = proc::alloc();
if (p == nullptr)
return 0;
p->vmap = vmap::alloc();
if (p->vmap == nullptr) {
auto proc_cleanup = scoped_cleanup([&p]() {
if (!xnspid->remove(p->pid, &p))
panic("fork: ns_remove");
freeproc(p);
});
p->vmap = vmap::alloc();
if (p->vmap == nullptr)
return 0;
}
p->context->rip = (u64)threadstub;
p->context->r12 = (u64)fn;
p->context->r13 = (u64)arg;
p->parent = nullptr;
p->cwd = nullptr;
proc_cleanup.dismiss();
return p;
}
......
您添加了 0 人 到此讨论。请谨慎行事。
请先完成此评论的编辑！
请 注册 或者 后发表评论