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8253180: ZGC: Implementation of JEP 376: ZGC: Concurrent Thread-Stack Processing

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Reviewed-by: stefank, pliden, rehn, neliasso, coleenp, smonteith
This commit is contained in:
Erik Österlund 2020-10-09 08:40:33 +00:00
parent a2f651904d
commit b9873e1833
131 changed files with 2428 additions and 572 deletions
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12
src/hotspot/share/c1/c1_Runtime1.cpp
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@ -63,6 +63,7 @@
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stackWatermarkSet.hpp"
#include "runtime/threadCritical.hpp"
#include "runtime/vframe.inline.hpp"
#include "runtime/vframeArray.hpp"
@ -505,6 +506,17 @@ JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* t
thread->set_is_method_handle_return(false);
Handle exception(thread, ex);
// This function is called when we are about to throw an exception. Therefore,
// we have to poll the stack watermark barrier to make sure that not yet safe
// stack frames are made safe before returning into them.
if (thread->last_frame().cb() == Runtime1::blob_for(Runtime1::handle_exception_from_callee_id)) {
// The Runtime1::handle_exception_from_callee_id handler is invoked after the
// frame has been unwound. It instead builds its own stub frame, to call the
// runtime. But the throwing frame has already been unwound here.
StackWatermarkSet::after_unwind(thread);
}
nm = CodeCache::find_nmethod(pc);
assert(nm != NULL, "this is not an nmethod");
// Adjust the pc as needed/