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30 package work
31
32 import (
33 "fmt"
34 "internal/lazyregexp"
35 "regexp"
36 "strings"
37
38 "cmd/go/internal/cfg"
39 "cmd/go/internal/load"
40 )
41
42 var re = lazyregexp.New
43
44 var validCompilerFlags = []*lazyregexp.Regexp{
45 re(`-D([A-Za-z_][A-Za-z0-9_]*)(=[^@\-]*)?`),
46 re(`-U([A-Za-z_][A-Za-z0-9_]*)`),
47 re(`-F([^@\-].*)`),
48 re(`-I([^@\-].*)`),
49 re(`-O`),
50 re(`-O([^@\-].*)`),
51 re(`-W`),
52 re(`-W([^@,]+)`),
53 re(`-Wa,-mbig-obj`),
54 re(`-Wp,-D([A-Za-z_][A-Za-z0-9_]*)(=[^@,\-]*)?`),
55 re(`-Wp,-U([A-Za-z_][A-Za-z0-9_]*)`),
56 re(`-ansi`),
57 re(`-f(no-)?asynchronous-unwind-tables`),
58 re(`-f(no-)?blocks`),
59 re(`-f(no-)builtin-[a-zA-Z0-9_]*`),
60 re(`-f(no-)?common`),
61 re(`-f(no-)?constant-cfstrings`),
62 re(`-fdiagnostics-show-note-include-stack`),
63 re(`-f(no-)?eliminate-unused-debug-types`),
64 re(`-f(no-)?exceptions`),
65 re(`-f(no-)?fast-math`),
66 re(`-f(no-)?inline-functions`),
67 re(`-finput-charset=([^@\-].*)`),
68 re(`-f(no-)?fat-lto-objects`),
69 re(`-f(no-)?keep-inline-dllexport`),
70 re(`-f(no-)?lto`),
71 re(`-fmacro-backtrace-limit=(.+)`),
72 re(`-fmessage-length=(.+)`),
73 re(`-f(no-)?modules`),
74 re(`-f(no-)?objc-arc`),
75 re(`-f(no-)?objc-nonfragile-abi`),
76 re(`-f(no-)?objc-legacy-dispatch`),
77 re(`-f(no-)?omit-frame-pointer`),
78 re(`-f(no-)?openmp(-simd)?`),
79 re(`-f(no-)?permissive`),
80 re(`-f(no-)?(pic|PIC|pie|PIE)`),
81 re(`-f(no-)?plt`),
82 re(`-f(no-)?rtti`),
83 re(`-f(no-)?split-stack`),
84 re(`-f(no-)?stack-(.+)`),
85 re(`-f(no-)?strict-aliasing`),
86 re(`-f(un)signed-char`),
87 re(`-f(no-)?use-linker-plugin`),
88 re(`-f(no-)?visibility-inlines-hidden`),
89 re(`-fsanitize=(.+)`),
90 re(`-ftemplate-depth-(.+)`),
91 re(`-fvisibility=(.+)`),
92 re(`-g([^@\-].*)?`),
93 re(`-m32`),
94 re(`-m64`),
95 re(`-m(abi|arch|cpu|fpu|tune)=([^@\-].*)`),
96 re(`-m(no-)?v?aes`),
97 re(`-marm`),
98 re(`-m(no-)?avx[0-9a-z]*`),
99 re(`-mfloat-abi=([^@\-].*)`),
100 re(`-mfpmath=[0-9a-z,+]*`),
101 re(`-m(no-)?avx[0-9a-z.]*`),
102 re(`-m(no-)?ms-bitfields`),
103 re(`-m(no-)?stack-(.+)`),
104 re(`-mmacosx-(.+)`),
105 re(`-mios-simulator-version-min=(.+)`),
106 re(`-miphoneos-version-min=(.+)`),
107 re(`-mtvos-simulator-version-min=(.+)`),
108 re(`-mtvos-version-min=(.+)`),
109 re(`-mwatchos-simulator-version-min=(.+)`),
110 re(`-mwatchos-version-min=(.+)`),
111 re(`-mnop-fun-dllimport`),
112 re(`-m(no-)?sse[0-9.]*`),
113 re(`-m(no-)?ssse3`),
114 re(`-mthumb(-interwork)?`),
115 re(`-mthreads`),
116 re(`-mwindows`),
117 re(`--param=ssp-buffer-size=[0-9]*`),
118 re(`-pedantic(-errors)?`),
119 re(`-pipe`),
120 re(`-pthread`),
121 re(`-?-std=([^@\-].*)`),
122 re(`-?-stdlib=([^@\-].*)`),
123 re(`--sysroot=([^@\-].*)`),
124 re(`-w`),
125 re(`-x([^@\-].*)`),
126 re(`-v`),
127 }
128
129 var validCompilerFlagsWithNextArg = []string{
130 "-arch",
131 "-D",
132 "-U",
133 "-I",
134 "-framework",
135 "-include",
136 "-isysroot",
137 "-isystem",
138 "--sysroot",
139 "-target",
140 "-x",
141 }
142
143 var validLinkerFlags = []*lazyregexp.Regexp{
144 re(`-F([^@\-].*)`),
145 re(`-l([^@\-].*)`),
146 re(`-L([^@\-].*)`),
147 re(`-O`),
148 re(`-O([^@\-].*)`),
149 re(`-f(no-)?(pic|PIC|pie|PIE)`),
150 re(`-f(no-)?openmp(-simd)?`),
151 re(`-fsanitize=([^@\-].*)`),
152 re(`-flat_namespace`),
153 re(`-g([^@\-].*)?`),
154 re(`-headerpad_max_install_names`),
155 re(`-m(abi|arch|cpu|fpu|tune)=([^@\-].*)`),
156 re(`-mfloat-abi=([^@\-].*)`),
157 re(`-mmacosx-(.+)`),
158 re(`-mios-simulator-version-min=(.+)`),
159 re(`-miphoneos-version-min=(.+)`),
160 re(`-mthreads`),
161 re(`-mwindows`),
162 re(`-(pic|PIC|pie|PIE)`),
163 re(`-pthread`),
164 re(`-rdynamic`),
165 re(`-shared`),
166 re(`-?-static([-a-z0-9+]*)`),
167 re(`-?-stdlib=([^@\-].*)`),
168 re(`-v`),
169
170
171
172
173
174
175 re(`-Wl,--(no-)?allow-multiple-definition`),
176 re(`-Wl,--(no-)?allow-shlib-undefined`),
177 re(`-Wl,--(no-)?as-needed`),
178 re(`-Wl,-Bdynamic`),
179 re(`-Wl,-berok`),
180 re(`-Wl,-Bstatic`),
181 re(`-Wl,-Bsymbolic-functions`),
182 re(`-Wl,-O([^@,\-][^,]*)?`),
183 re(`-Wl,-d[ny]`),
184 re(`-Wl,--disable-new-dtags`),
185 re(`-Wl,-e[=,][a-zA-Z0-9]*`),
186 re(`-Wl,--enable-new-dtags`),
187 re(`-Wl,--end-group`),
188 re(`-Wl,--(no-)?export-dynamic`),
189 re(`-Wl,-E`),
190 re(`-Wl,-framework,[^,@\-][^,]+`),
191 re(`-Wl,--hash-style=(sysv|gnu|both)`),
192 re(`-Wl,-headerpad_max_install_names`),
193 re(`-Wl,--no-undefined`),
194 re(`-Wl,-R([^@\-][^,@]*$)`),
195 re(`-Wl,--just-symbols[=,]([^,@\-][^,@]+)`),
196 re(`-Wl,-rpath(-link)?[=,]([^,@\-][^,]+)`),
197 re(`-Wl,-s`),
198 re(`-Wl,-search_paths_first`),
199 re(`-Wl,-sectcreate,([^,@\-][^,]+),([^,@\-][^,]+),([^,@\-][^,]+)`),
200 re(`-Wl,--start-group`),
201 re(`-Wl,-?-static`),
202 re(`-Wl,-?-subsystem,(native|windows|console|posix|xbox)`),
203 re(`-Wl,-syslibroot[=,]([^,@\-][^,]+)`),
204 re(`-Wl,-undefined[=,]([^,@\-][^,]+)`),
205 re(`-Wl,-?-unresolved-symbols=[^,]+`),
206 re(`-Wl,--(no-)?warn-([^,]+)`),
207 re(`-Wl,-?-wrap[=,][^,@\-][^,]*`),
208 re(`-Wl,-z,(no)?execstack`),
209 re(`-Wl,-z,relro`),
210
211 re(`[a-zA-Z0-9_/].*\.(a|o|obj|dll|dylib|so|tbd)`),
212 re(`\./.*\.(a|o|obj|dll|dylib|so|tbd)`),
213 }
214
215 var validLinkerFlagsWithNextArg = []string{
216 "-arch",
217 "-F",
218 "-l",
219 "-L",
220 "-framework",
221 "-isysroot",
222 "--sysroot",
223 "-target",
224 "-Wl,-framework",
225 "-Wl,-rpath",
226 "-Wl,-R",
227 "-Wl,--just-symbols",
228 "-Wl,-undefined",
229 }
230
231 func checkCompilerFlags(name, source string, list []string) error {
232 return checkFlags(name, source, list, validCompilerFlags, validCompilerFlagsWithNextArg)
233 }
234
235 func checkLinkerFlags(name, source string, list []string) error {
236 return checkFlags(name, source, list, validLinkerFlags, validLinkerFlagsWithNextArg)
237 }
238
239 func checkFlags(name, source string, list []string, valid []*lazyregexp.Regexp, validNext []string) error {
240
241 var (
242 allow *regexp.Regexp
243 disallow *regexp.Regexp
244 )
245 if env := cfg.Getenv("CGO_" + name + "_ALLOW"); env != "" {
246 r, err := regexp.Compile(env)
247 if err != nil {
248 return fmt.Errorf("parsing $CGO_%s_ALLOW: %v", name, err)
249 }
250 allow = r
251 }
252 if env := cfg.Getenv("CGO_" + name + "_DISALLOW"); env != "" {
253 r, err := regexp.Compile(env)
254 if err != nil {
255 return fmt.Errorf("parsing $CGO_%s_DISALLOW: %v", name, err)
256 }
257 disallow = r
258 }
259
260 Args:
261 for i := 0; i < len(list); i++ {
262 arg := list[i]
263 if disallow != nil && disallow.FindString(arg) == arg {
264 goto Bad
265 }
266 if allow != nil && allow.FindString(arg) == arg {
267 continue Args
268 }
269 for _, re := range valid {
270 if re.FindString(arg) == arg {
271 continue Args
272 }
273 }
274 for _, x := range validNext {
275 if arg == x {
276 if i+1 < len(list) && load.SafeArg(list[i+1]) {
277 i++
278 continue Args
279 }
280
281
282 if i+1 < len(list) &&
283 strings.HasPrefix(arg, "-Wl,") &&
284 strings.HasPrefix(list[i+1], "-Wl,") &&
285 load.SafeArg(list[i+1][4:]) &&
286 !strings.Contains(list[i+1][4:], ",") {
287 i++
288 continue Args
289 }
290
291
292 if i+1 < len(list) && arg == "-I" {
293 if (strings.HasPrefix(list[i+1], "=") || strings.HasPrefix(list[i+1], "$SYSROOT")) &&
294 load.SafeArg(list[i+1][1:]) {
295 i++
296 continue Args
297 }
298 }
299
300 if i+1 < len(list) {
301 return fmt.Errorf("invalid flag in %s: %s %s (see https://golang.org/s/invalidflag)", source, arg, list[i+1])
302 }
303 return fmt.Errorf("invalid flag in %s: %s without argument (see https://golang.org/s/invalidflag)", source, arg)
304 }
305 }
306 Bad:
307 return fmt.Errorf("invalid flag in %s: %s", source, arg)
308 }
309 return nil
310 }
311
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