| 1 | /* Host support routines for MinGW, for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2006-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "main.h" |
| 22 | #include "serial.h" |
| 23 | #include "event-loop.h" |
| 24 | |
| 25 | #include "gdb_select.h" |
| 26 | |
| 27 | #include <windows.h> |
| 28 | |
| 29 | /* Return an absolute file name of the running GDB, if possible, or |
| 30 | ARGV0 if not. The return value is in malloc'ed storage. */ |
| 31 | |
| 32 | char * |
| 33 | windows_get_absolute_argv0 (const char *argv0) |
| 34 | { |
| 35 | char full_name[PATH_MAX]; |
| 36 | |
| 37 | if (GetModuleFileName (NULL, full_name, PATH_MAX)) |
| 38 | return xstrdup (full_name); |
| 39 | return xstrdup (argv0); |
| 40 | } |
| 41 | |
| 42 | /* Wrapper for select. On Windows systems, where the select interface |
| 43 | only works for sockets, this uses the GDB serial abstraction to |
| 44 | handle sockets, consoles, pipes, and serial ports. |
| 45 | |
| 46 | The arguments to this function are the same as the traditional |
| 47 | arguments to select on POSIX platforms. */ |
| 48 | |
| 49 | int |
| 50 | gdb_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, |
| 51 | struct timeval *timeout) |
| 52 | { |
| 53 | static HANDLE never_handle; |
| 54 | HANDLE handles[MAXIMUM_WAIT_OBJECTS]; |
| 55 | HANDLE h; |
| 56 | DWORD event; |
| 57 | DWORD num_handles; |
| 58 | /* SCBS contains serial control objects corresponding to file |
| 59 | descriptors in READFDS and WRITEFDS. */ |
| 60 | struct serial *scbs[MAXIMUM_WAIT_OBJECTS]; |
| 61 | /* The number of valid entries in SCBS. */ |
| 62 | size_t num_scbs; |
| 63 | int fd; |
| 64 | int num_ready; |
| 65 | size_t indx; |
| 66 | |
| 67 | if (n == 0) |
| 68 | { |
| 69 | /* The MS API says that the first argument to |
| 70 | WaitForMultipleObjects cannot be zero. That's why we just |
| 71 | use a regular Sleep here. */ |
| 72 | if (timeout != NULL) |
| 73 | Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000); |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | num_ready = 0; |
| 79 | num_handles = 0; |
| 80 | num_scbs = 0; |
| 81 | for (fd = 0; fd < n; ++fd) |
| 82 | { |
| 83 | HANDLE read = NULL, except = NULL; |
| 84 | struct serial *scb; |
| 85 | |
| 86 | /* There is no support yet for WRITEFDS. At present, this isn't |
| 87 | used by GDB -- but we do not want to silently ignore WRITEFDS |
| 88 | if something starts using it. */ |
| 89 | gdb_assert (!writefds || !FD_ISSET (fd, writefds)); |
| 90 | |
| 91 | if ((!readfds || !FD_ISSET (fd, readfds)) |
| 92 | && (!exceptfds || !FD_ISSET (fd, exceptfds))) |
| 93 | continue; |
| 94 | |
| 95 | scb = serial_for_fd (fd); |
| 96 | if (scb) |
| 97 | { |
| 98 | serial_wait_handle (scb, &read, &except); |
| 99 | scbs[num_scbs++] = scb; |
| 100 | } |
| 101 | |
| 102 | if (read == NULL) |
| 103 | read = (HANDLE) _get_osfhandle (fd); |
| 104 | if (except == NULL) |
| 105 | { |
| 106 | if (!never_handle) |
| 107 | never_handle = CreateEvent (0, FALSE, FALSE, 0); |
| 108 | |
| 109 | except = never_handle; |
| 110 | } |
| 111 | |
| 112 | if (readfds && FD_ISSET (fd, readfds)) |
| 113 | { |
| 114 | gdb_assert (num_handles < MAXIMUM_WAIT_OBJECTS); |
| 115 | handles[num_handles++] = read; |
| 116 | } |
| 117 | |
| 118 | if (exceptfds && FD_ISSET (fd, exceptfds)) |
| 119 | { |
| 120 | gdb_assert (num_handles < MAXIMUM_WAIT_OBJECTS); |
| 121 | handles[num_handles++] = except; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | gdb_assert (num_handles <= MAXIMUM_WAIT_OBJECTS); |
| 126 | |
| 127 | event = WaitForMultipleObjects (num_handles, |
| 128 | handles, |
| 129 | FALSE, |
| 130 | timeout |
| 131 | ? (timeout->tv_sec * 1000 |
| 132 | + timeout->tv_usec / 1000) |
| 133 | : INFINITE); |
| 134 | /* EVENT can only be a value in the WAIT_ABANDONED_0 range if the |
| 135 | HANDLES included an abandoned mutex. Since GDB doesn't use |
| 136 | mutexes, that should never occur. */ |
| 137 | gdb_assert (!(WAIT_ABANDONED_0 <= event |
| 138 | && event < WAIT_ABANDONED_0 + num_handles)); |
| 139 | /* We no longer need the helper threads to check for activity. */ |
| 140 | for (indx = 0; indx < num_scbs; ++indx) |
| 141 | serial_done_wait_handle (scbs[indx]); |
| 142 | if (event == WAIT_FAILED) |
| 143 | return -1; |
| 144 | if (event == WAIT_TIMEOUT) |
| 145 | return 0; |
| 146 | /* Run through the READFDS, clearing bits corresponding to descriptors |
| 147 | for which input is unavailable. */ |
| 148 | h = handles[event - WAIT_OBJECT_0]; |
| 149 | for (fd = 0, indx = 0; fd < n; ++fd) |
| 150 | { |
| 151 | HANDLE fd_h; |
| 152 | |
| 153 | if ((!readfds || !FD_ISSET (fd, readfds)) |
| 154 | && (!exceptfds || !FD_ISSET (fd, exceptfds))) |
| 155 | continue; |
| 156 | |
| 157 | if (readfds && FD_ISSET (fd, readfds)) |
| 158 | { |
| 159 | fd_h = handles[indx++]; |
| 160 | /* This handle might be ready, even though it wasn't the handle |
| 161 | returned by WaitForMultipleObjects. */ |
| 162 | if (fd_h != h && WaitForSingleObject (fd_h, 0) != WAIT_OBJECT_0) |
| 163 | FD_CLR (fd, readfds); |
| 164 | else |
| 165 | num_ready++; |
| 166 | } |
| 167 | |
| 168 | if (exceptfds && FD_ISSET (fd, exceptfds)) |
| 169 | { |
| 170 | fd_h = handles[indx++]; |
| 171 | /* This handle might be ready, even though it wasn't the handle |
| 172 | returned by WaitForMultipleObjects. */ |
| 173 | if (fd_h != h && WaitForSingleObject (fd_h, 0) != WAIT_OBJECT_0) |
| 174 | FD_CLR (fd, exceptfds); |
| 175 | else |
| 176 | num_ready++; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | return num_ready; |
| 181 | } |
| 182 | |
| 183 | /* Map COLOR's RGB triplet, with 8 bits per component, into 16 Windows |
| 184 | console colors, where each component has just 1 bit, plus a single |
| 185 | intensity bit which affects all 3 components. */ |
| 186 | static int |
| 187 | rgb_to_16colors (const ui_file_style::color &color) |
| 188 | { |
| 189 | uint8_t rgb[3]; |
| 190 | color.get_rgb (rgb); |
| 191 | |
| 192 | int retval = 0; |
| 193 | for (int i = 0; i < 3; i++) |
| 194 | { |
| 195 | /* Subdivide 256 possible values of each RGB component into 3 |
| 196 | regions: no color, normal color, bright color. 256 / 3 = 85, |
| 197 | but ui-style.c follows xterm and uses 92 for R and G |
| 198 | components of the bright-blue color, so we bias the divisor a |
| 199 | bit to have the bright colors between 9 and 15 identical to |
| 200 | what ui-style.c expects. */ |
| 201 | int bits = rgb[i] / 93; |
| 202 | retval |= ((bits > 0) << (2 - i)) | ((bits > 1) << 3); |
| 203 | } |
| 204 | |
| 205 | return retval; |
| 206 | } |
| 207 | |
| 208 | /* Zero if not yet initialized, 1 if stdout is a console device, else -1. */ |
| 209 | static int mingw_console_initialized; |
| 210 | |
| 211 | /* Handle to stdout . */ |
| 212 | static HANDLE hstdout = INVALID_HANDLE_VALUE; |
| 213 | |
| 214 | /* Text attribute to use for normal text (the "none" pseudo-color). */ |
| 215 | static SHORT norm_attr; |
| 216 | |
| 217 | /* The most recently applied style. */ |
| 218 | static ui_file_style last_style; |
| 219 | |
| 220 | /* Alternative for the libc 'fputs' which handles embedded SGR |
| 221 | sequences in support of styling. */ |
| 222 | |
| 223 | int |
| 224 | gdb_console_fputs (const char *linebuf, FILE *fstream) |
| 225 | { |
| 226 | if (!mingw_console_initialized) |
| 227 | { |
| 228 | hstdout = (HANDLE)_get_osfhandle (fileno (fstream)); |
| 229 | DWORD cmode; |
| 230 | CONSOLE_SCREEN_BUFFER_INFO csbi; |
| 231 | |
| 232 | if (hstdout != INVALID_HANDLE_VALUE |
| 233 | && GetConsoleMode (hstdout, &cmode) != 0 |
| 234 | && GetConsoleScreenBufferInfo (hstdout, &csbi)) |
| 235 | { |
| 236 | norm_attr = csbi.wAttributes; |
| 237 | mingw_console_initialized = 1; |
| 238 | } |
| 239 | else if (hstdout != INVALID_HANDLE_VALUE) |
| 240 | mingw_console_initialized = -1; /* valid, but not a console device */ |
| 241 | } |
| 242 | /* If our stdout is not a console device, let the default 'fputs' |
| 243 | handle the task. */ |
| 244 | if (mingw_console_initialized <= 0) |
| 245 | return 0; |
| 246 | |
| 247 | /* Mapping between 8 ANSI colors and Windows console attributes. */ |
| 248 | static int fg_color[] = { |
| 249 | 0, /* black */ |
| 250 | FOREGROUND_RED, /* red */ |
| 251 | FOREGROUND_GREEN, /* green */ |
| 252 | FOREGROUND_GREEN | FOREGROUND_RED, /* yellow */ |
| 253 | FOREGROUND_BLUE, /* blue */ |
| 254 | FOREGROUND_BLUE | FOREGROUND_RED, /* magenta */ |
| 255 | FOREGROUND_BLUE | FOREGROUND_GREEN, /* cyan */ |
| 256 | FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE /* gray */ |
| 257 | }; |
| 258 | static int bg_color[] = { |
| 259 | 0, /* black */ |
| 260 | BACKGROUND_RED, /* red */ |
| 261 | BACKGROUND_GREEN, /* green */ |
| 262 | BACKGROUND_GREEN | BACKGROUND_RED, /* yellow */ |
| 263 | BACKGROUND_BLUE, /* blue */ |
| 264 | BACKGROUND_BLUE | BACKGROUND_RED, /* magenta */ |
| 265 | BACKGROUND_BLUE | BACKGROUND_GREEN, /* cyan */ |
| 266 | BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE /* gray */ |
| 267 | }; |
| 268 | |
| 269 | ui_file_style style = last_style; |
| 270 | unsigned char c; |
| 271 | size_t n_read; |
| 272 | |
| 273 | for ( ; (c = *linebuf) != 0; linebuf += n_read) |
| 274 | { |
| 275 | if (c == '\033') |
| 276 | { |
| 277 | fflush (fstream); |
| 278 | bool parsed = style.parse (linebuf, &n_read); |
| 279 | if (n_read <= 0) /* should never happen */ |
| 280 | n_read = 1; |
| 281 | if (!parsed) |
| 282 | { |
| 283 | /* This means we silently swallow SGR sequences we |
| 284 | cannot parse. */ |
| 285 | continue; |
| 286 | } |
| 287 | /* Colors. */ |
| 288 | const ui_file_style::color &fg = style.get_foreground (); |
| 289 | const ui_file_style::color &bg = style.get_background (); |
| 290 | int fgcolor, bgcolor, bright, inverse; |
| 291 | if (fg.is_none ()) |
| 292 | fgcolor = norm_attr & 15; |
| 293 | else if (fg.is_basic ()) |
| 294 | fgcolor = fg_color[fg.get_value () & 15]; |
| 295 | else |
| 296 | fgcolor = rgb_to_16colors (fg); |
| 297 | if (bg.is_none ()) |
| 298 | bgcolor = norm_attr & (15 << 4); |
| 299 | else if (bg.is_basic ()) |
| 300 | bgcolor = bg_color[bg.get_value () & 15]; |
| 301 | else |
| 302 | bgcolor = rgb_to_16colors (bg) << 4; |
| 303 | |
| 304 | /* Intensity. */ |
| 305 | switch (style.get_intensity ()) |
| 306 | { |
| 307 | case ui_file_style::NORMAL: |
| 308 | case ui_file_style::DIM: |
| 309 | bright = 0; |
| 310 | break; |
| 311 | case ui_file_style::BOLD: |
| 312 | bright = 1; |
| 313 | break; |
| 314 | default: |
| 315 | gdb_assert_not_reached ("invalid intensity"); |
| 316 | } |
| 317 | |
| 318 | /* Inverse video. */ |
| 319 | if (style.is_reverse ()) |
| 320 | inverse = 1; |
| 321 | else |
| 322 | inverse = 0; |
| 323 | |
| 324 | /* Construct the attribute. */ |
| 325 | if (inverse) |
| 326 | { |
| 327 | int t = fgcolor; |
| 328 | fgcolor = (bgcolor >> 4); |
| 329 | bgcolor = (t << 4); |
| 330 | } |
| 331 | if (bright) |
| 332 | fgcolor |= FOREGROUND_INTENSITY; |
| 333 | |
| 334 | SHORT attr = (bgcolor & (15 << 4)) | (fgcolor & 15); |
| 335 | |
| 336 | /* Apply the attribute. */ |
| 337 | SetConsoleTextAttribute (hstdout, attr); |
| 338 | } |
| 339 | else |
| 340 | { |
| 341 | /* When we are about to write newline, we need to clear to |
| 342 | EOL with the normal attribute, to avoid spilling the |
| 343 | colors to the next screen line. We assume here that no |
| 344 | non-default attribute extends beyond the newline. */ |
| 345 | if (c == '\n') |
| 346 | { |
| 347 | DWORD nchars; |
| 348 | COORD start_pos; |
| 349 | DWORD written; |
| 350 | CONSOLE_SCREEN_BUFFER_INFO csbi; |
| 351 | |
| 352 | fflush (fstream); |
| 353 | GetConsoleScreenBufferInfo (hstdout, &csbi); |
| 354 | |
| 355 | if (csbi.wAttributes != norm_attr) |
| 356 | { |
| 357 | start_pos = csbi.dwCursorPosition; |
| 358 | nchars = csbi.dwSize.X - start_pos.X; |
| 359 | |
| 360 | FillConsoleOutputAttribute (hstdout, norm_attr, nchars, |
| 361 | start_pos, &written); |
| 362 | FillConsoleOutputCharacter (hstdout, ' ', nchars, |
| 363 | start_pos, &written); |
| 364 | } |
| 365 | } |
| 366 | fputc (c, fstream); |
| 367 | n_read = 1; |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | last_style = style; |
| 372 | return 1; |
| 373 | } |