48 // locking
49 // hdr : must be rax, contents destroyed
50 // obj : must point to the object to lock, contents preserved
51 // disp_hdr: must point to the displaced header location, contents preserved
52 // scratch : scratch register, contents destroyed
53 // returns code offset at which to add null check debug information
54 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
55
56 // unlocking
57 // hdr : contents destroyed
58 // obj : must point to the object to lock, contents preserved
59 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed
60 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
61
62 void initialize_object(
63 Register obj, // result: pointer to object after successful allocation
64 Register klass, // object klass
65 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
66 int con_size_in_bytes, // object size in bytes if known at compile time
67 Register t1, // temp register
68 Register t2 // temp register
69 );
70
71 // allocation of fixed-size objects
72 // (can also be used to allocate fixed-size arrays, by setting
73 // hdr_size correctly and storing the array length afterwards)
74 // obj : must be rax, will contain pointer to allocated object
75 // t1, t2 : scratch registers - contents destroyed
76 // header_size: size of object header in words
77 // object_size: total size of object in words
78 // slow_case : exit to slow case implementation if fast allocation fails
79 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
80
81 enum {
82 max_array_allocation_length = 0x00FFFFFF
83 };
84
85 // allocation of arrays
86 // obj : must be rax, will contain pointer to allocated object
87 // len : array length in number of elements
88 // t : scratch register - contents destroyed
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48 // locking
49 // hdr : must be rax, contents destroyed
50 // obj : must point to the object to lock, contents preserved
51 // disp_hdr: must point to the displaced header location, contents preserved
52 // scratch : scratch register, contents destroyed
53 // returns code offset at which to add null check debug information
54 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
55
56 // unlocking
57 // hdr : contents destroyed
58 // obj : must point to the object to lock, contents preserved
59 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed
60 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
61
62 void initialize_object(
63 Register obj, // result: pointer to object after successful allocation
64 Register klass, // object klass
65 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
66 int con_size_in_bytes, // object size in bytes if known at compile time
67 Register t1, // temp register
68 Register t2, // temp register
69 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
70 );
71
72 // allocation of fixed-size objects
73 // (can also be used to allocate fixed-size arrays, by setting
74 // hdr_size correctly and storing the array length afterwards)
75 // obj : must be rax, will contain pointer to allocated object
76 // t1, t2 : scratch registers - contents destroyed
77 // header_size: size of object header in words
78 // object_size: total size of object in words
79 // slow_case : exit to slow case implementation if fast allocation fails
80 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
81
82 enum {
83 max_array_allocation_length = 0x00FFFFFF
84 };
85
86 // allocation of arrays
87 // obj : must be rax, will contain pointer to allocated object
88 // len : array length in number of elements
89 // t : scratch register - contents destroyed
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