1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2018. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifndef __ERL_VM_H__
#define __ERL_VM_H__
/* FORCE_HEAP_FRAGS:
* Debug provocation to make HAlloc always create heap fragments (if allowed)
* even if there is room on heap.
*/
/* #define FORCE_HEAP_FRAGS */
#if defined(DEBUG) && !defined(CHECK_FOR_HOLES) && !defined(__WIN32__)
# define CHECK_FOR_HOLES
#endif
#define BEAM 1
#define EMULATOR "BEAM"
#define SEQ_TRACE 1
#define CONTEXT_REDS 4000 /* Swap process out after this number */
#define MAX_ARG 255 /* Max number of arguments allowed */
#define MAX_REG 1024 /* Max number of x(N) registers used */
/*
* The new arithmetic operations need some extra X registers in the register array.
* so does the gc_bif's (i_gc_bif3 need 3 extra).
*/
#define ERTS_X_REGS_ALLOCATED (MAX_REG+3)
#define H_DEFAULT_SIZE 233 /* default (heap + stack) min size */
#define VH_DEFAULT_SIZE 32768 /* default virtual (bin) heap min size (words) */
#define H_DEFAULT_MAX_SIZE 0 /* default max heap size is off */
#define CP_SIZE 1
#define ErtsHAllocLockCheck(P) \
ERTS_LC_ASSERT(erts_dbg_check_halloc_lock((P)))
#ifdef DEBUG
/*
* Debug HAlloc that initialize all memory to bad things.
*
* To get information about where memory is allocated, insert the two
* lines below directly after the memset line and use the flag +va.
*
VERBOSE(DEBUG_ALLOCATION,("HAlloc @ 0x%08lx (%d) %s:%d\n", \
(unsigned long)HEAP_TOP(p),(sz),__FILE__,__LINE__)), \
*/
# ifdef CHECK_FOR_HOLES
# define INIT_HEAP_MEM(p,sz) erts_set_hole_marker(HEAP_TOP(p), (sz))
# else
# define INIT_HEAP_MEM(p,sz) sys_memset(HEAP_TOP(p),0x01,(sz)*sizeof(Eterm*))
# endif
#else
# define INIT_HEAP_MEM(p,sz) ((void)0)
#endif /* DEBUG */
#ifdef FORCE_HEAP_FRAGS
# define IS_FORCE_HEAP_FRAGS 1
#else
# define IS_FORCE_HEAP_FRAGS 0
#endif
/*
* Allocate heap memory, first on the ordinary heap;
* failing that, in a heap fragment.
*/
#define HAllocX(p, sz, xtra) \
(ASSERT((sz) >= 0), \
ErtsHAllocLockCheck(p), \
(IS_FORCE_HEAP_FRAGS || (((HEAP_LIMIT(p) - HEAP_TOP(p)) < (sz))) \
? erts_heap_alloc((p),(sz),(xtra)) \
: (INIT_HEAP_MEM(p,sz), \
HEAP_TOP(p) = HEAP_TOP(p) + (sz), HEAP_TOP(p) - (sz))))
#define HAlloc(P, SZ) HAllocX(P,SZ,0)
#define HRelease(p, endp, ptr) \
if ((ptr) == (endp)) { \
; \
} else if (HEAP_START(p) <= (ptr) && (ptr) < HEAP_TOP(p)) { \
ASSERT(HEAP_TOP(p) == (endp)); \
HEAP_TOP(p) = (ptr); \
} else { \
ASSERT(MBUF(p)->mem + MBUF(p)->used_size == (endp)); \
erts_heap_frag_shrink(p, ptr); \
}
#define HeapWordsLeft(p) (HEAP_LIMIT(p) - HEAP_TOP(p))
#if defined(DEBUG) || defined(CHECK_FOR_HOLES)
/*
* ERTS_HOLE_MARKER must *not* be mistaken for a valid term
* on the heap...
*/
# ifdef ARCH_64
# define ERTS_HOLE_MARKER \
make_catch(UWORD_CONSTANT(0xdeadbeaf00000000) >> _TAG_IMMED2_SIZE)
/* Will (at the time of writing) appear as 0xdeadbeaf0000001b */
# else
# define ERTS_HOLE_MARKER \
make_catch(UWORD_CONSTANT(0xdead0000) >> _TAG_IMMED2_SIZE)
/* Will (at the time of writing) appear as 0xdead001b */
# endif
#endif
/*
* Allocate heap memory on the ordinary heap, NEVER in a heap
* segment. The caller must ensure that there is enough words
* left on the heap before calling HeapOnlyAlloc() (for instance,
* by testing HeapWordsLeft() and calling the garbage collector
* if not enough).
*/
#ifdef CHECK_FOR_HOLES
# define HeapOnlyAlloc(p, sz) \
(ASSERT((sz) >= 0), \
(ASSERT(((HEAP_LIMIT(p) - HEAP_TOP(p)) >= (sz))), \
(erts_set_hole_marker(HEAP_TOP(p), (sz)), \
(HEAP_TOP(p) = HEAP_TOP(p) + (sz), HEAP_TOP(p) - (sz)))))
#else
# define HeapOnlyAlloc(p, sz) \
(ASSERT((sz) >= 0), \
(ASSERT(((HEAP_LIMIT(p) - HEAP_TOP(p)) >= (sz))), \
(HEAP_TOP(p) = HEAP_TOP(p) + (sz), HEAP_TOP(p) - (sz))))
#endif
/*
* Description for each instruction (defined here because the name and
* count fields are interesting outside the emulator proper).
*/
typedef struct op_entry {
char* name; /* Name of instruction. */
Uint32 mask[3]; /* Signature mask. */
unsigned involves_r; /* Needs special attention when matching. */
int sz; /* Number of loaded words. */
int adjust; /* Adjustment for start of instruction. */
char* pack; /* Instructions for packing engine. */
char* sign; /* Signature string. */
} OpEntry;
extern const OpEntry opc[]; /* Description of all instructions. */
extern const int num_instructions; /* Number of instruction in opc[]. */
extern Uint erts_instr_count[];
/* some constants for various table sizes etc */
#define ATOM_TEXT_SIZE 32768 /* Increment for allocating atom text space */
#define ITIME 100 /* Number of milliseconds per clock tick */
#define MAX_PORT_LINK 8 /* Maximum number of links to a port */
extern int H_MIN_SIZE; /* minimum (heap + stack) */
extern int BIN_VH_MIN_SIZE; /* minimum virtual (bin) heap */
extern int H_MAX_SIZE; /* maximum (heap + stack) */
extern int H_MAX_FLAGS; /* maximum heap flags */
extern int erts_atom_table_size;/* Atom table size */
extern int erts_pd_initial_size;/* Initial Process dictionary table size */
#define ORIG_CREATION 0
/* macros for extracting bytes from uint16's */
#define hi_byte(a) ((a) >> 8)
#define lo_byte(a) ((a) & 255)
/* macros for combining bytes */
#define make_16(x, y) (((x) << 8) | (y))
#define make_24(x,y,z) (((x) << 16) | ((y) << 8) | (z))
#define make_32(x3,x2,x1,x0) (((x3)<<24) | ((x2)<<16) | ((x1)<<8) | (x0))
#define make_signed_24(x,y,z) ((sint32) (((x) << 24) | ((y) << 16) | ((z) << 8)) >> 8)
#define make_signed_32(x3,x2,x1,x0) ((sint32) (((x3) << 24) | ((x2) << 16) | ((x1) << 8) | (x0)))
#include "erl_term.h"
#if defined(NO_JUMP_TABLE)
# define BeamOpsAreInitialized() (1)
# define BeamOpCodeAddr(OpCode) ((BeamInstr)(OpCode))
#else
extern void** beam_ops;
# define BeamOpsAreInitialized() (beam_ops != 0)
# define BeamOpCodeAddr(OpCode) ((BeamInstr)beam_ops[(OpCode)])
#endif
#if defined(ARCH_64) && defined(CODE_MODEL_SMALL)
# define BeamCodeAddr(InstrWord) ((BeamInstr)(Uint32)(InstrWord))
# define BeamSetCodeAddr(InstrWord, Addr) (((InstrWord) & ~((1ull << 32)-1)) | (Addr))
# define BeamExtraData(InstrWord) ((InstrWord) >> 32)
#else
# define BeamCodeAddr(InstrWord) ((BeamInstr)(InstrWord))
# define BeamSetCodeAddr(InstrWord, Addr) (Addr)
#endif
#define BeamIsOpCode(InstrWord, OpCode) (BeamCodeAddr(InstrWord) == BeamOpCodeAddr(OpCode))
#endif /* __ERL_VM_H__ */
|
