11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
26 #define CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
27
28 #include "runtime/frame.inline.hpp"
29 #include "runtime/registerMap.hpp"
30
31 // Java frames don't have callee saved registers (except for rbp), so we can use a smaller RegisterMap
32 class SmallRegisterMap {
33 constexpr SmallRegisterMap() = default;
34 ~SmallRegisterMap() = default;
35 NONCOPYABLE(SmallRegisterMap);
36
37 public:
38 static const SmallRegisterMap* instance() {
39 static constexpr SmallRegisterMap the_instance{};
40 return &the_instance;
41 }
42
43 private:
44 static void assert_is_rbp(VMReg r) NOT_DEBUG_RETURN
45 DEBUG_ONLY({ assert(r == rbp->as_VMReg() || r == rbp->as_VMReg()->next(), "Reg: %s", r->name()); })
46 public:
47 // as_RegisterMap is used when we didn't want to templatize and abstract over RegisterMap type to support SmallRegisterMap
48 // Consider enhancing SmallRegisterMap to support those cases
49 const RegisterMap* as_RegisterMap() const { return nullptr; }
50 RegisterMap* as_RegisterMap() { return nullptr; }
51
52 RegisterMap* copy_to_RegisterMap(RegisterMap* map, intptr_t* sp) const {
53 map->clear();
54 map->set_include_argument_oops(this->include_argument_oops());
55 frame::update_map_with_saved_link(map, (intptr_t**)sp - frame::sender_sp_offset);
56 return map;
57 }
58
59 inline address location(VMReg reg, intptr_t* sp) const {
60 assert_is_rbp(reg);
61 return (address)(sp - frame::sender_sp_offset);
62 }
63
64 inline void set_location(VMReg reg, address loc) { assert_is_rbp(reg); }
65
66 JavaThread* thread() const {
67 #ifndef ASSERT
68 guarantee (false, "unreachable");
69 #endif
70 return nullptr;
71 }
72
73 bool update_map() const { return false; }
74 bool walk_cont() const { return false; }
75 bool include_argument_oops() const { return false; }
76 void set_include_argument_oops(bool f) {}
77 bool in_cont() const { return false; }
78 stackChunkHandle stack_chunk() const { return stackChunkHandle(); }
79
80 #ifdef ASSERT
81 bool should_skip_missing() const { return false; }
82 VMReg find_register_spilled_here(void* p, intptr_t* sp) { return rbp->as_VMReg(); }
83 void print() const { print_on(tty); }
84 void print_on(outputStream* st) const { st->print_cr("Small register map"); }
85 #endif
86 };
87
88 #endif // CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
26 #define CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
27
28 #include "runtime/frame.inline.hpp"
29 #include "runtime/registerMap.hpp"
30
31 class SmallRegisterMap;
32
33 // Java frames don't have callee saved registers (except for rbp), so we can use a smaller RegisterMap
34 template <bool IncludeArgs>
35 class SmallRegisterMapType {
36 friend SmallRegisterMap;
37
38 constexpr SmallRegisterMapType() = default;
39 ~SmallRegisterMapType() = default;
40 NONCOPYABLE(SmallRegisterMapType);
41
42 static void assert_is_rbp(VMReg r) NOT_DEBUG_RETURN
43 DEBUG_ONLY({ assert(r == rbp->as_VMReg() || r == rbp->as_VMReg()->next(), "Reg: %s", r->name()); })
44 public:
45 // as_RegisterMap is used when we didn't want to templatize and abstract over RegisterMap type to support SmallRegisterMapType
46 // Consider enhancing SmallRegisterMapType to support those cases
47 const RegisterMap* as_RegisterMap() const { return nullptr; }
48 RegisterMap* as_RegisterMap() { return nullptr; }
49
50 RegisterMap* copy_to_RegisterMap(RegisterMap* map, intptr_t* sp) const {
51 map->clear();
52 map->set_include_argument_oops(this->include_argument_oops());
53 frame::update_map_with_saved_link(map, (intptr_t**)sp - frame::sender_sp_offset);
54 return map;
55 }
56
57 inline address location(VMReg reg, intptr_t* sp) const {
58 assert_is_rbp(reg);
59 return (address)(sp - frame::sender_sp_offset);
60 }
61
62 inline void set_location(VMReg reg, address loc) { assert_is_rbp(reg); }
63
64 JavaThread* thread() const {
65 #ifndef ASSERT
66 guarantee (false, "unreachable");
67 #endif
68 return nullptr;
69 }
70
71 bool update_map() const { return false; }
72 bool walk_cont() const { return false; }
73 bool include_argument_oops() const { return IncludeArgs; }
74 void set_include_argument_oops(bool f) {}
75 bool in_cont() const { return false; }
76 stackChunkHandle stack_chunk() const { return stackChunkHandle(); }
77
78 #ifdef ASSERT
79 bool should_skip_missing() const { return false; }
80 VMReg find_register_spilled_here(void* p, intptr_t* sp) { return rbp->as_VMReg(); }
81 void print() const { print_on(tty); }
82 void print_on(outputStream* st) const { st->print_cr("Small register map"); }
83 #endif
84 };
85
86 #endif // CPU_X86_SMALLREGISTERMAP_X86_INLINE_HPP
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