Bug Summary

File:src/gnu/usr.bin/binutils/gdb/mi/mi-out.c
Warning:line 109, column 16
Value stored to 'data' during its initialization is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name mi-out.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -resource-dir /usr/local/lib/clang/13.0.0 -D PIE_DEFAULT=1 -I . -I /usr/src/gnu/usr.bin/binutils/gdb -I /usr/src/gnu/usr.bin/binutils/gdb/config -D LOCALEDIR="/usr/share/locale" -D HAVE_CONFIG_H -I /usr/src/gnu/usr.bin/binutils/gdb/../include/opcode -I ../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../include -I ../intl -I /usr/src/gnu/usr.bin/binutils/gdb/../intl -D MI_OUT=1 -D TUI=1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fcommon -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/usr.bin/binutils/gdb/mi/mi-out.c
1/* MI Command Set - output generating routines.
2
3 Copyright 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
4
5 Contributed by Cygnus Solutions (a Red Hat company).
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24#include "defs.h"
25#include "ui-out.h"
26#include "mi-out.h"
27
28struct ui_out_data
29 {
30 int suppress_field_separator;
31 int suppress_output;
32 int mi_version;
33 struct ui_file *buffer;
34 };
35typedef struct ui_out_data mi_out_data;
36
37/* These are the MI output functions */
38
39static void mi_table_begin (struct ui_out *uiout, int nbrofcols,
40 int nr_rows, const char *tblid);
41static void mi_table_body (struct ui_out *uiout);
42static void mi_table_end (struct ui_out *uiout);
43static void mi_table_header (struct ui_out *uiout, int width,
44 enum ui_align alig, const char *col_name,
45 const char *colhdr);
46static void mi_begin (struct ui_out *uiout, enum ui_out_type type,
47 int level, const char *id);
48static void mi_end (struct ui_out *uiout, enum ui_out_type type, int level);
49static void mi_field_int (struct ui_out *uiout, int fldno, int width,
50 enum ui_align alig, const char *fldname, int value);
51static void mi_field_skip (struct ui_out *uiout, int fldno, int width,
52 enum ui_align alig, const char *fldname);
53static void mi_field_string (struct ui_out *uiout, int fldno, int width,
54 enum ui_align alig, const char *fldname,
55 const char *string);
56static void mi_field_fmt (struct ui_out *uiout, int fldno,
57 int width, enum ui_align align,
58 const char *fldname, const char *format,
59 va_list args);
60static void mi_spaces (struct ui_out *uiout, int numspaces);
61static void mi_text (struct ui_out *uiout, const char *string);
62static void mi_message (struct ui_out *uiout, int verbosity,
63 const char *format, va_list args);
64static void mi_wrap_hint (struct ui_out *uiout, char *identstring);
65static void mi_flush (struct ui_out *uiout);
66
67/* This is the MI ui-out implementation functions vector */
68
69/* FIXME: This can be initialized dynamically after default is set to
70 handle initial output in main.c */
71
72struct ui_out_impl mi_ui_out_impl =
73{
74 mi_table_begin,
75 mi_table_body,
76 mi_table_end,
77 mi_table_header,
78 mi_begin,
79 mi_end,
80 mi_field_int,
81 mi_field_skip,
82 mi_field_string,
83 mi_field_fmt,
84 mi_spaces,
85 mi_text,
86 mi_message,
87 mi_wrap_hint,
88 mi_flush,
89 NULL((void*)0),
90 1, /* Needs MI hacks. */
91};
92
93/* Prototypes for local functions */
94
95extern void _initialize_mi_out (void);
96static void field_separator (struct ui_out *uiout);
97static void mi_open (struct ui_out *uiout, const char *name,
98 enum ui_out_type type);
99static void mi_close (struct ui_out *uiout, enum ui_out_type type);
100
101/* Mark beginning of a table */
102
103void
104mi_table_begin (struct ui_out *uiout,
105 int nr_cols,
106 int nr_rows,
107 const char *tblid)
108{
109 mi_out_data *data = ui_out_data (uiout);
Value stored to 'data' during its initialization is never read
110 mi_open (uiout, tblid, ui_out_type_tuple);
111 mi_field_int (uiout, -1/*fldno*/, -1/*width*/, -1/*alin*/,
112 "nr_rows", nr_rows);
113 mi_field_int (uiout, -1/*fldno*/, -1/*width*/, -1/*alin*/,
114 "nr_cols", nr_cols);
115 mi_open (uiout, "hdr", ui_out_type_list);
116}
117
118/* Mark beginning of a table body */
119
120void
121mi_table_body (struct ui_out *uiout)
122{
123 mi_out_data *data = ui_out_data (uiout);
124 if (data->suppress_output)
125 return;
126 /* close the table header line if there were any headers */
127 mi_close (uiout, ui_out_type_list);
128 mi_open (uiout, "body", ui_out_type_list);
129}
130
131/* Mark end of a table */
132
133void
134mi_table_end (struct ui_out *uiout)
135{
136 mi_out_data *data = ui_out_data (uiout);
137 data->suppress_output = 0;
138 mi_close (uiout, ui_out_type_list); /* body */
139 mi_close (uiout, ui_out_type_tuple);
140}
141
142/* Specify table header */
143
144void
145mi_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
146 const char *col_name,
147 const char *colhdr)
148{
149 mi_out_data *data = ui_out_data (uiout);
150 if (data->suppress_output)
151 return;
152 mi_open (uiout, NULL((void*)0), ui_out_type_tuple);
153 mi_field_int (uiout, 0, 0, 0, "width", width);
154 mi_field_int (uiout, 0, 0, 0, "alignment", alignment);
155 mi_field_string (uiout, 0, 0, 0, "col_name", col_name);
156 mi_field_string (uiout, 0, width, alignment, "colhdr", colhdr);
157 mi_close (uiout, ui_out_type_tuple);
158}
159
160/* Mark beginning of a list */
161
162void
163mi_begin (struct ui_out *uiout,
164 enum ui_out_type type,
165 int level,
166 const char *id)
167{
168 mi_out_data *data = ui_out_data (uiout);
169 if (data->suppress_output)
170 return;
171 mi_open (uiout, id, type);
172}
173
174/* Mark end of a list */
175
176void
177mi_end (struct ui_out *uiout,
178 enum ui_out_type type,
179 int level)
180{
181 mi_out_data *data = ui_out_data (uiout);
182 if (data->suppress_output)
183 return;
184 mi_close (uiout, type);
185}
186
187/* output an int field */
188
189void
190mi_field_int (struct ui_out *uiout, int fldno, int width,
191 enum ui_align alignment, const char *fldname, int value)
192{
193 char buffer[20]; /* FIXME: how many chars long a %d can become? */
194 mi_out_data *data = ui_out_data (uiout);
195 if (data->suppress_output)
196 return;
197
198 sprintf (buffer, "%d", value);
199 mi_field_string (uiout, fldno, width, alignment, fldname, buffer);
200}
201
202/* used to ommit a field */
203
204void
205mi_field_skip (struct ui_out *uiout, int fldno, int width,
206 enum ui_align alignment, const char *fldname)
207{
208 mi_out_data *data = ui_out_data (uiout);
209 if (data->suppress_output)
210 return;
211 mi_field_string (uiout, fldno, width, alignment, fldname, "");
212}
213
214/* other specific mi_field_* end up here so alignment and field
215 separators are both handled by mi_field_string */
216
217void
218mi_field_string (struct ui_out *uiout,
219 int fldno,
220 int width,
221 enum ui_align align,
222 const char *fldname,
223 const char *string)
224{
225 mi_out_data *data = ui_out_data (uiout);
226 if (data->suppress_output)
227 return;
228 field_separator (uiout);
229 if (fldname)
230 fprintf_unfiltered (data->buffer, "%s=", fldname);
231 fprintf_unfiltered (data->buffer, "\"");
232 if (string)
233 fputstr_unfiltered (string, '"', data->buffer);
234 fprintf_unfiltered (data->buffer, "\"");
235}
236
237/* This is the only field function that does not align */
238
239void
240mi_field_fmt (struct ui_out *uiout, int fldno,
241 int width, enum ui_align align,
242 const char *fldname,
243 const char *format,
244 va_list args)
245{
246 mi_out_data *data = ui_out_data (uiout);
247 if (data->suppress_output)
248 return;
249 field_separator (uiout);
250 if (fldname)
251 fprintf_unfiltered (data->buffer, "%s=\"", fldname);
252 else
253 fputs_unfiltered ("\"", data->buffer);
254 vfprintf_unfiltered (data->buffer, format, args);
255 fputs_unfiltered ("\"", data->buffer);
256}
257
258void
259mi_spaces (struct ui_out *uiout, int numspaces)
260{
261}
262
263void
264mi_text (struct ui_out *uiout, const char *string)
265{
266}
267
268void
269mi_message (struct ui_out *uiout, int verbosity,
270 const char *format,
271 va_list args)
272{
273}
274
275void
276mi_wrap_hint (struct ui_out *uiout, char *identstring)
277{
278 wrap_here (identstring);
279}
280
281void
282mi_flush (struct ui_out *uiout)
283{
284 mi_out_data *data = ui_out_data (uiout);
285 gdb_flush (data->buffer);
286}
287
288/* local functions */
289
290/* access to ui_out format private members */
291
292static void
293field_separator (struct ui_out *uiout)
294{
295 mi_out_data *data = ui_out_data (uiout);
296 if (data->suppress_field_separator)
297 data->suppress_field_separator = 0;
298 else
299 fputc_unfiltered (',', data->buffer);
300}
301
302static void
303mi_open (struct ui_out *uiout,
304 const char *name,
305 enum ui_out_type type)
306{
307 mi_out_data *data = ui_out_data (uiout);
308 field_separator (uiout);
309 data->suppress_field_separator = 1;
310 if (name)
311 fprintf_unfiltered (data->buffer, "%s=", name);
312 switch (type)
313 {
314 case ui_out_type_tuple:
315 fputc_unfiltered ('{', data->buffer);
316 break;
317 case ui_out_type_list:
318 fputc_unfiltered ('[', data->buffer);
319 break;
320 default:
321 internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/mi/mi-out.c", __LINE__321, "bad switch");
322 }
323}
324
325static void
326mi_close (struct ui_out *uiout,
327 enum ui_out_type type)
328{
329 mi_out_data *data = ui_out_data (uiout);
330 switch (type)
331 {
332 case ui_out_type_tuple:
333 fputc_unfiltered ('}', data->buffer);
334 break;
335 case ui_out_type_list:
336 fputc_unfiltered (']', data->buffer);
337 break;
338 default:
339 internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/mi/mi-out.c", __LINE__339, "bad switch");
340 }
341 data->suppress_field_separator = 0;
342}
343
344/* add a string to the buffer */
345
346void
347mi_out_buffered (struct ui_out *uiout, char *string)
348{
349 mi_out_data *data = ui_out_data (uiout);
350 fprintf_unfiltered (data->buffer, "%s", string);
351}
352
353/* clear the buffer */
354
355void
356mi_out_rewind (struct ui_out *uiout)
357{
358 mi_out_data *data = ui_out_data (uiout);
359 ui_file_rewind (data->buffer);
360}
361
362/* dump the buffer onto the specified stream */
363
364static void
365do_write (void *data, const char *buffer, long length_buffer)
366{
367 ui_file_write (data, buffer, length_buffer);
368}
369
370void
371mi_out_put (struct ui_out *uiout,
372 struct ui_file *stream)
373{
374 mi_out_data *data = ui_out_data (uiout);
375 ui_file_put (data->buffer, do_write, stream);
376 ui_file_rewind (data->buffer);
377}
378
379/* Current MI version. */
380
381int
382mi_version (struct ui_out *uiout)
383{
384 mi_out_data *data = ui_out_data (uiout);
385 return data->mi_version;
386}
387
388/* initalize private members at startup */
389
390struct ui_out *
391mi_out_new (int mi_version)
392{
393 int flags = 0;
394 mi_out_data *data = XMALLOC (mi_out_data)((mi_out_data*) xmalloc (sizeof (mi_out_data)));
395 data->suppress_field_separator = 0;
396 data->suppress_output = 0;
397 data->mi_version = mi_version;
398 /* FIXME: This code should be using a ``string_file'' and not the
399 TUI buffer hack. */
400 data->buffer = mem_fileopen ();
401 return ui_out_new (&mi_ui_out_impl, data, flags);
402}
403
404/* standard gdb initialization hook */
405void
406_initialize_mi_out (void)
407{
408 /* nothing happens here */
409}