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1 | /* Generic plugin context |
2 | Copyright (C) 2020 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <cc1plugin-config.h> | |
21 | ||
22 | #undef PACKAGE_NAME | |
23 | #undef PACKAGE_STRING | |
24 | #undef PACKAGE_TARNAME | |
25 | #undef PACKAGE_VERSION | |
26 | ||
27 | #include "../gcc/config.h" | |
28 | ||
29 | #undef PACKAGE_NAME | |
30 | #undef PACKAGE_STRING | |
31 | #undef PACKAGE_TARNAME | |
32 | #undef PACKAGE_VERSION | |
33 | ||
34 | #include "gcc-plugin.h" | |
35 | #include "system.h" | |
36 | #include "coretypes.h" | |
37 | #include "stringpool.h" | |
38 | #include "hash-set.h" | |
39 | #include "diagnostic.h" | |
40 | #include "langhooks.h" | |
41 | #include "langhooks-def.h" | |
42 | ||
43 | #include "gcc-interface.h" | |
44 | ||
45 | #include "context.hh" | |
46 | #include "marshall.hh" | |
47 | ||
48 | \f | |
49 | ||
50 | #ifdef __GNUC__ | |
51 | #pragma GCC visibility push(default) | |
52 | #endif | |
53 | int plugin_is_GPL_compatible; | |
54 | #ifdef __GNUC__ | |
55 | #pragma GCC visibility pop | |
56 | #endif | |
57 | ||
58 | cc1_plugin::plugin_context *cc1_plugin::current_context; | |
59 | ||
60 | \f | |
61 | ||
62 | // This is put into the lang hooks when the plugin starts. | |
63 | ||
64 | static void | |
65 | plugin_print_error_function (diagnostic_context *context, const char *file, | |
66 | diagnostic_info *diagnostic) | |
67 | { | |
68 | if (current_function_decl != NULL_TREE | |
69 | && DECL_NAME (current_function_decl) != NULL_TREE | |
70 | && strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), | |
71 | GCC_FE_WRAPPER_FUNCTION) == 0) | |
72 | return; | |
73 | lhd_print_error_function (context, file, diagnostic); | |
74 | } | |
75 | ||
76 | \f | |
77 | ||
78 | location_t | |
79 | cc1_plugin::plugin_context::get_location_t (const char *filename, | |
80 | unsigned int line_number) | |
81 | { | |
82 | if (filename == NULL) | |
83 | return UNKNOWN_LOCATION; | |
84 | ||
85 | filename = intern_filename (filename); | |
86 | linemap_add (line_table, LC_ENTER, false, filename, line_number); | |
87 | location_t loc = linemap_line_start (line_table, line_number, 0); | |
88 | linemap_add (line_table, LC_LEAVE, false, NULL, 0); | |
89 | return loc; | |
90 | } | |
91 | ||
92 | // Add a file name to FILE_NAMES and return the canonical copy. | |
93 | const char * | |
94 | cc1_plugin::plugin_context::intern_filename (const char *filename) | |
95 | { | |
96 | const char **slot = file_names.find_slot (filename, INSERT); | |
97 | if (*slot == NULL) | |
98 | { | |
99 | /* The file name must live as long as the line map, which | |
100 | effectively means as long as this compilation. So, we copy | |
101 | the string here but never free it. */ | |
102 | *slot = xstrdup (filename); | |
103 | } | |
104 | return *slot; | |
105 | } | |
106 | ||
107 | void | |
108 | cc1_plugin::plugin_context::mark () | |
109 | { | |
110 | for (const auto &item : address_map) | |
111 | { | |
112 | ggc_mark (item->decl); | |
113 | ggc_mark (item->address); | |
114 | } | |
115 | ||
116 | for (const auto &item : preserved) | |
117 | ggc_mark (&item); | |
118 | } | |
119 | ||
120 | \f | |
121 | ||
122 | // Perform GC marking. | |
123 | ||
124 | static void | |
125 | gc_mark (void *, void *) | |
126 | { | |
127 | if (cc1_plugin::current_context != NULL) | |
128 | cc1_plugin::current_context->mark (); | |
129 | } | |
130 | ||
131 | void | |
132 | cc1_plugin::generic_plugin_init (struct plugin_name_args *plugin_info, | |
133 | unsigned int version) | |
134 | { | |
135 | long fd = -1; | |
136 | for (int i = 0; i < plugin_info->argc; ++i) | |
137 | { | |
138 | if (strcmp (plugin_info->argv[i].key, "fd") == 0) | |
139 | { | |
140 | char *tail; | |
141 | errno = 0; | |
142 | fd = strtol (plugin_info->argv[i].value, &tail, 0); | |
143 | if (*tail != '\0' || errno != 0) | |
144 | fatal_error (input_location, | |
145 | "%s: invalid file descriptor argument to plugin", | |
146 | plugin_info->base_name); | |
147 | break; | |
148 | } | |
149 | } | |
150 | if (fd == -1) | |
151 | fatal_error (input_location, | |
152 | "%s: required plugin argument %<fd%> is missing", | |
153 | plugin_info->base_name); | |
154 | ||
155 | current_context = new plugin_context (fd); | |
156 | ||
157 | // Handshake. | |
158 | cc1_plugin::protocol_int h_version; | |
159 | if (!current_context->require ('H') | |
160 | || ! ::cc1_plugin::unmarshall (current_context, &h_version)) | |
161 | fatal_error (input_location, | |
162 | "%s: handshake failed", plugin_info->base_name); | |
163 | if (h_version != version) | |
164 | fatal_error (input_location, | |
165 | "%s: unknown version in handshake", plugin_info->base_name); | |
166 | ||
167 | register_callback (plugin_info->base_name, PLUGIN_GGC_MARKING, | |
168 | gc_mark, NULL); | |
169 | ||
170 | lang_hooks.print_error_function = plugin_print_error_function; | |
171 | } |