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[compiler-rt] XFAIL test on iOS 

On iOS, when we `longjmp()` out of the signal handler, a subsequent call
to `sigaltstack()` still reports that we are executing on the signal
handler stack.
Tracking rdar://66789814

Differential Revision: https://reviews.llvm.org/D85677
This commit is contained in:
Julian Lettner 2020-08-10 11:45:51 -07:00
parent ec5f793996
commit bfb0b853b2
1 changed files with 11 additions and 5 deletions
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16
compiler-rt/test/asan/TestCases/Posix/unpoison-alternate-stack.cpp
View File

@ -6,6 +6,8 @@
// RUN: %clangxx_asan -std=c++20 -fexceptions -O0 %s -o %t -pthread
// RUN: %run %t
// XFAIL: ios && !iossim
#include <cassert>
#include <cerrno>
#include <csetjmp>
@ -62,12 +64,14 @@ void testOnCurrentStack() {
c.RightRedzone - c.LeftRedzone));
}
bool isOnSignalStack() {
stack_t Stack;
sigaltstack(nullptr, &Stack);
return Stack.ss_flags == SS_ONSTACK;
}
void signalHandler(int, siginfo_t *, void *) {
{
stack_t Stack;
sigaltstack(nullptr, &Stack);
assert(Stack.ss_flags == SS_ONSTACK);
}
assert(isOnSignalStack());
// test on signal alternate stack
testOnCurrentStack();
@ -110,6 +114,8 @@ void *threadFun(void *AltStack) {
// Test on signal alternate stack, via signalHandler
poisonStackAndJump(defaultStack, [] { raise(SIGUSR1); });
assert(!isOnSignalStack());
assert(0 == __asan_region_is_poisoned(
defaultStack.LeftRedzone,
defaultStack.RightRedzone - defaultStack.LeftRedzone));