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Increase alternative signal stack size on 64-bit devices.

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Bug: 23041777
Bug: 24187462
Change-Id: I7d84c0cc775a74753a3e8e101169c0fb5dbf7437
This commit is contained in:
Yabin Cui
2015-09-22 11:16:15 -07:00
parent 1399759118
commit 33ac04a215
3 changed files with 31 additions and 2 deletions
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24
tests/pthread_test.cpp
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@@ -27,6 +27,7 @@
#include <sys/syscall.h>
#include <time.h>
#include <unistd.h>
#include <unwind.h>
#include <atomic>
#include <regex>
@@ -1632,3 +1633,26 @@ TEST_F(pthread_DeathTest, pthread_mutex_unlock_null_64) {
GTEST_LOG_(INFO) << "This test tests bionic implementation details on 64 bit devices.";
#endif
}
extern _Unwind_Reason_Code FrameCounter(_Unwind_Context* ctx, void* arg);
static volatile bool signal_handler_on_altstack_done;
static void SignalHandlerOnAltStack(int signo, siginfo_t*, void*) {
ASSERT_EQ(SIGUSR1, signo);
// Check if we have enough stack space for unwinding.
int count = 0;
_Unwind_Backtrace(FrameCounter, &count);
ASSERT_GT(count, 0);
// Check if we have enough stack space for logging.
std::string s(2048, '*');
GTEST_LOG_(INFO) << s;
signal_handler_on_altstack_done = true;
}
TEST(pthread, big_enough_signal_stack_for_64bit_arch) {
signal_handler_on_altstack_done = false;
ScopedSignalHandler handler(SIGUSR1, SignalHandlerOnAltStack, SA_SIGINFO | SA_ONSTACK);
kill(getpid(), SIGUSR1);
ASSERT_TRUE(signal_handler_on_altstack_done);
}