diff options
Diffstat (limited to 'runtime/thread_linux.cc')
| -rw-r--r-- | runtime/thread_linux.cc | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/runtime/thread_linux.cc b/runtime/thread_linux.cc index ee66ccc29a..9aacb301ec 100644 --- a/runtime/thread_linux.cc +++ b/runtime/thread_linux.cc @@ -32,11 +32,18 @@ static void SigAltStack(stack_t* new_stack, stack_t* old_stack) { } } +// The default SIGSTKSZ on linux is 8K. If we do any logging in a signal +// handler this is too small. We allocate 16K instead. +static constexpr int kHostAltSigStackSize = 16*1024; // 16K signal stack. + void Thread::SetUpAlternateSignalStack() { // Create and set an alternate signal stack. +#ifdef HAVE_ANDROID_OS + LOG(FATAL) << "Invalid use of alternate signal stack on Android"; +#endif stack_t ss; - ss.ss_sp = new uint8_t[SIGSTKSZ]; - ss.ss_size = SIGSTKSZ; + ss.ss_sp = new uint8_t[kHostAltSigStackSize]; + ss.ss_size = kHostAltSigStackSize; ss.ss_flags = 0; CHECK(ss.ss_sp != NULL); SigAltStack(&ss, NULL); @@ -56,7 +63,7 @@ void Thread::TearDownAlternateSignalStack() { // Tell the kernel to stop using it. ss.ss_sp = NULL; ss.ss_flags = SS_DISABLE; - ss.ss_size = SIGSTKSZ; // Avoid ENOMEM failure with Mac OS' buggy libc. + ss.ss_size = kHostAltSigStackSize; // Avoid ENOMEM failure with Mac OS' buggy libc. SigAltStack(&ss, NULL); // Free it. |