aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/beam_load.h
blob: 659b9c303fe9c9ced9d46846b3fc71483f06ccd8 (plain) (blame)
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
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 1999-2016. 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 _BEAM_LOAD_H
#  define _BEAM_LOAD_H

#include "beam_opcodes.h"
#include "erl_process.h"

Eterm beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks,
			    Eterm module);

typedef struct gen_op_entry {
   char* name;
   int arity;
   int specific;
   int num_specific;
   int transform;
} GenOpEntry;

extern const GenOpEntry gen_opc[];

extern BeamInstr beam_debug_apply[];
extern BeamInstr* em_call_error_handler;
extern BeamInstr* em_apply_bif;
extern BeamInstr* em_call_nif;

struct ErtsLiteralArea_;

/*
 * The following variables keep a sorted list of address ranges for
 * each module.  It allows us to quickly find a function given an
 * instruction pointer.
 */

/* Total code size in bytes */
extern Uint erts_total_code_size;

typedef struct BeamCodeLineTab_ BeamCodeLineTab;

/*
 * Header of code chunks which contains additional information
 * about the loaded module.
 */
typedef struct beam_code_header {
    /*
     * Number of functions.
     */
    UWord num_functions;

    /*
     * The attributes retrieved by Mod:module_info(attributes).
     */
    byte* attr_ptr;
    UWord attr_size;
    UWord attr_size_on_heap;

    /*
     * The compilation information retrieved by Mod:module_info(compile).
     */
    byte* compile_ptr;
    UWord compile_size;
    UWord compile_size_on_heap;

    /*
     * Literal area (constant pool).
     */
    struct ErtsLiteralArea_ *literal_area;

    /*
     * Pointer to the on_load function (or NULL if none).
     */
    BeamInstr* on_load_function_ptr;

    /*
     * Pointer to the line table (or NULL if none).
     */
    BeamCodeLineTab* line_table;

    /*
     * Pointer to the module MD5 sum (16 bytes)
     */
    byte* md5_ptr;

    /*
     * Start of function pointer table.  This table contains pointers to
     * all functions in the module plus an additional pointer just beyond
     * the end of the last function.
     *
     * The actual loaded code (for the first function) start just beyond
     * this table.
     */
    ErtsCodeInfo* functions[1];

}BeamCodeHeader;

#ifdef ERTS_DIRTY_SCHEDULERS
#  define BEAM_NIF_MIN_FUNC_SZ 4
#else
#  define BEAM_NIF_MIN_FUNC_SZ 3
#endif

void erts_release_literal_area(struct ErtsLiteralArea_* literal_area);
int erts_is_module_native(BeamCodeHeader* code);
void erts_beam_bif_load_init(void);
struct erl_fun_entry;
void erts_purge_state_add_fun(struct erl_fun_entry *fe);
Export *erts_suspend_process_on_pending_purge_lambda(Process *c_p,
                                                     struct erl_fun_entry*);

/*
 * Layout of the line table.
 */
struct BeamCodeLineTab_ {
    Eterm* fname_ptr;
    int loc_size;
    union {
        Uint16* p2;
        Uint32* p4;
    }loc_tab;
    const BeamInstr** func_tab[1];
};

#define LINE_INVALID_LOCATION (0)

/*
 * Macros for manipulating locations.
 */

#define IS_VALID_LOCATION(File, Line) \
    ((unsigned) (File) < 255 && (unsigned) (Line) < ((1 << 24) - 1))
#define MAKE_LOCATION(File, Line) (((File) << 24) | (Line))
#define LOC_FILE(Loc) ((Loc) >> 24)
#define LOC_LINE(Loc) ((Loc) & ((1 << 24)-1))


/*
 * MFA event debug "tracing" usage:
 *
 * #define ENABLE_DBG_TRACE_MFA
 * call dbg_set_traced_mfa("mymod","myfunc",arity)
 * for the function(s) to trace, in some init function.
 *
 * Run and get stderr printouts when interesting things happen to your MFA.
 */
#ifdef  ENABLE_DBG_TRACE_MFA

void dbg_set_traced_mfa(const char* m, const char* f, Uint a);
int dbg_is_traced_mfa(Eterm m, Eterm f, Uint a);
void dbg_vtrace_mfa(unsigned ix, const char* format, ...);
#define DBG_TRACE_MFA(M,F,A,FMT, ...) do {\
    unsigned ix;\
    if ((ix=dbg_is_traced_mfa(M,F,A))) \
        dbg_vtrace_mfa(ix, FMT"\n", ##__VA_ARGS__);\
  }while(0)

#define DBG_TRACE_MFA_P(MFA, FMT, ...) \
        DBG_TRACE_MFA((MFA)->module, (MFA)->function, (MFA)->arity, FMT, ##__VA_ARGS__)

#else
#  define dbg_set_traced_mfa(M,F,A)
#  define DBG_TRACE_MFA(M,F,A,FMT, ...)
#  define DBG_TRACE_MFA_P(MFA,FMT, ...)
#endif /* ENABLE_DBG_TRACE_MFA */

#endif /* _BEAM_LOAD_H */