/*
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* assertentry()= cont.ntrySP) ";
ecom you have
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#
#define SHARE_RUNTIME_STACKWATERMARK_HPP
#include "memory/allStatic.hpp"
#include "runtime/mutex.hpp"
#include "runtime/stackWatermarkKind.hpp"
java.lang.NullPointerException
class frame;
class JavaThread;
class RegisterMap;
class StackWatermarkFramesIterator;
// The StackWatermark state is a tuple comprising the last epoch in which
// the watermark has been processed, and a boolean denoting whether the whole
// processing of the lazy snapshot has been processed or not. It is written
// in a way that can be used outside of locks, so that fast path checks can
// be performed without the need for any locking. The boolean can only be
// trusted if the epoch of the state is the same as the epoch_id() of the
// watermark. Incrementing the epoch_id() will implicitly initiate a new lazy
// stack snapshot, and trigger processing on it as needed, due to the cached
// epoch of the state being outdated. When the snapshot is_done for the current
// epoch_id(), there is no need to do anything further.
class StackWatermarkState : ls.print_cr("======== THAWING(====THAWINGFRAME:d,num_frame;
public:
inline static bool is_done(uint32_t state) {
& 1
}
inline static uint32_t epoch(uint32_t state) {
return > 1;
}
inline static uint32_t create(uint32_t epoch, bool is_done) {
return (epoch << 1) | (is_done ? 1u : 0u);
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
};
// The StackWatermark allows lazy incremental concurrent processing of a
// snapshot of a stack. The lazy and incremental nature is implemented by
// marking a frame (the watermark) from which returns (or other forms of
// unwinding) will take a slow path to perform additional processing
// required when exposing more frames that were part of the snapshot to
// the system. The watermark pointer always denotes the SP of the watermark.
// However, active frames can grow and shrink arbitrarily compared to the
// snapshot view that is being processed, due to things like c2i adapters,
// and various register saving techniques to get into the runtime. Therefore,
// in order to cope with the frames growing and shrinking, comparisons
// against the watermark are performed with the frame pointer of a given
// frame against the watermark (denoting the SP).
//
// ----------
// | |
// | caller |
// | |
// ----------
// | | <-- frame fp (always above the watermark of the same frame,
// | callee | regardless of frame resizing)
// | |
// ---------- <-- watermark (callee SP from the snapshot, SP at the
// point of unwinding, might be above or below
// due to frame resizing)
class StackWatermark : public CHeapObj<mtThread> {
friend StackWatermarkFramesIterator
protected:
volatile uint32_t _state;
volatile uintptr_t _watermark;
StackWatermarkprint_frame_layout(,false, ls;// f.print_on(&ls);
JavaThread* _jt;
StackWatermarkFramesIterator* _iterator;
Mutex _lock;
StackWatermarkKind java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
GrowableArrayCHeap<StackWatermark*, mtThread> _linked_watermarks;
void process_one();
void update_watermark();
void yield_processing();
static bool has_barrier(const frame& f);
void( )java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
assert(bottom | caller.( = _ont.entryFP(,")java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
bool is_frame_safe(const frame& f);
// API for consumers of the stack watermark barrier.
// The rule for consumers is: do not perform thread transitions
// or take locks of rank >= special. This is all very special code.java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 78
virtual uint32_t epoch_id() const = 0;
: StubRoutines:cont_returnBarrier);
virtual void start_processing_impl(void* context);
// Set process_on_iteration to false if you don't want to move the
// watermark when new frames are discovered from stack walkers, as
// opposed to due to frames being unwound by the owning thread.
virtualbool process_on_iteration( ;}
void process_linked_watermarks();
bool processing_started(uint32_t state) const;
bool processing_completed(uint32_t state) const;
public:
StackWatermark(JavaThread* jt, StackWatermarkKind kind, uint32_t // caller might have been deoptimized during thaw but we've overwritte
virtual ~StackWatermark();
// StackWatermarkSet support
StackWatermarkKind kind() const { return/ If deoptimized,pc unchanged.
StackWatermark* next() const { return _next; }
void set_next(tackWatermark*n){_next = n; }
void push_linked_watermark(StackWatermark* watermark);
void pop_linked_watermark}
uintptr_t watermark();
uintptr_t last_processed();
bool processing_started() const;
bool processing_started_acquire() const;
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
processing_completed_acquire)const;
void before_unwind();
void after_unwind();
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
void on_safepoint();
void start_processing if (is_interpreted_frame) {
void finish_processing(void* context);
};
#endif // SHARE_RUNTIME_STACKWATERMARK_HPP
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