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runtime: in newstack, double-check calling goroutine

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Checking this condition helped me find the arm problem last night.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12267043
This commit is contained in:
Russ Cox 2013-08-02 13:51:28 -04:00
parent b8b48abe0f
commit ebc5513be6
1 changed files with 7 additions and 0 deletions
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7
src/pkg/runtime/stack.c
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@ -201,6 +201,13 @@ runtime·newstack(void)
bool reflectcall;
uintptr free;
if(m->morebuf.g != m->curg) {
runtime·printf("runtime: newstack called from g=%p\n"
"\tm=%p m->curg=%p m->g0=%p m->gsignal=%p\n",
m->morebuf.g, m, m->curg, m->g0, m->gsignal);
runtime·throw("runtime: wrong goroutine in newstack");
}
// gp->status is usually Grunning, but it could be Gsyscall if a stack split
// happens during a function call inside entersyscall.
gp = m->curg;