java-9-openjdk/ppc_stack_overflow_fix.patch

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2017-08-15 17:40:47 +00:00
diff --git a/src/cpu/zero/vm/stack_zero.hpp b/src/cpu/zero/vm/stack_zero.hpp
--- jdk9/hotspot/src/cpu/zero/vm/stack_zero.hpp
+++ jdk9/hotspot/src/cpu/zero/vm/stack_zero.hpp
@@ -99,7 +99,7 @@
int shadow_pages_size() const {
return _shadow_pages_size;
}
- int abi_stack_available(Thread *thread) const;
+ ssize_t abi_stack_available(Thread *thread) const;
public:
void overflow_check(int required_words, TRAPS);
diff --git a/src/cpu/zero/vm/stack_zero.inline.hpp b/src/cpu/zero/vm/stack_zero.inline.hpp
--- jdk9/hotspot/src/cpu/zero/vm/stack_zero.inline.hpp
+++ jdk9/hotspot/src/cpu/zero/vm/stack_zero.inline.hpp
@@ -47,12 +47,12 @@
// This method returns the amount of ABI stack available for us
// to use under normal circumstances. Note that the returned
// value can be negative.
-inline int ZeroStack::abi_stack_available(Thread *thread) const {
+inline ssize_t ZeroStack::abi_stack_available(Thread *thread) const {
guarantee(Thread::current() == thread, "should run in the same thread");
- int stack_used = thread->stack_base() - (address) &stack_used
+ ssize_t stack_used = thread->stack_base() - (address) &stack_used
+ (JavaThread::stack_guard_zone_size() + JavaThread::stack_shadow_zone_size());
- int stack_free = thread->stack_size() - stack_used;
+ ssize_t stack_free = thread->stack_size() - stack_used;
return stack_free;
}
#endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
diff --git a/src/os/linux/vm/os_linux.cpp b/src/os/linux/vm/os_linux.cpp
--- jdk9/hotspot/src/os/posix/vm/os_posix.cpp
+++ jdk9/hotspot/src/os/posix/vm/os_posix.cpp
@@ -4791,6 +4791,13 @@
JavaThread::stack_shadow_zone_size();
_java_thread_min_stack_allowed = align_size_up(_java_thread_min_stack_allowed, vm_page_size());
+#ifdef ZERO
+ // If this is Zero, allow at the very minimum one page each for the
+ // Zero stack and the native stack. This won't make any difference
+ // for 4k pages, but is significant for large pages.
+ _java_thread_min_stack_allowed = MAX2(_java_thread_min_stack_allowed,
+ align_size_up((size_t)(JavaThread::stack_guard_zone_size()+JavaThread::stack_shadow_zone_size()+2) * vm_page_size(), vm_page_size());
+#endif
size_t stack_size_in_bytes = ThreadStackSize * K;
if (stack_size_in_bytes != 0 &&