gdb/testsuite/gdb.trace/unavailable.cc

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2002-2017 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdlib.h>
  19 #include <string.h>
  20
  21 /* Test program partial trace data visualization.  */
  22
  23 /* Typedefs.  */
  24
  25 typedef struct TEST_STRUCT {
  26   char   memberc;
  27   int    memberi;
  28   float  memberf;
  29   double memberd;
  30 } test_struct;
  31
  32 struct small_struct
  33 {
  34   int member;
  35 };
  36
  37 struct small_struct_b : public small_struct
  38 {
  39 };
  40
  41 typedef int test_array [4];
  42
  43 /* Global variables to be collected.  */
  44
  45 char         globalc;
  46 int          globali;
  47 float        globalf;
  48 double       globald;
  49 test_struct  globalstruct;
  50 test_struct *globalp;
  51 int          globalarr[16];
  52 small_struct g_smallstruct;
  53 small_struct_b g_smallstruct_b;
  54
  55 /* Strings.  */
  56
  57 const char g_const_string[] = "hello world";
  58 char g_string_unavail[sizeof (g_const_string)];
  59 char g_string_partial[sizeof (g_const_string)];
  60 const char *g_string_p;
  61
  62 /* Used to check that <unavailable> is not the same as 0 in array
  63    element repetitions.  */
  64
  65 struct tuple
  66 {
  67   int a;
  68   int b;
  69 };
  70
  71 struct tuple tarray[8];
  72
  73 /* Test for overcollection.  GDB used to merge memory ranges to
  74    collect if they were close enough --- say, collect `a' and 'c'
  75    below, and you'd get 'b' as well.  This had been presumably done to
  76    cater for some target's inefficient trace buffer layout, but it is
  77    really not GDB's business to assume how the target manages its
  78    buffer.  If the target wants to overcollect, that's okay, since it
  79    knows what is and what isn't safe to touch (think memory mapped
  80    registers), and knows it's buffer layout.
  81
  82    The test assumes these three variables are laid out consecutively
  83    in memory.  Unfortunately, we can't use an array instead, since the
  84    agent expression generator does not even do constant folding,
  85    meaning that anything that's more complicated than collecting a
  86    global will generate an agent expression action to evaluate on the
  87    target, instead of a simple "collect memory" action.  */
  88 int a;
  89 int b;
  90 int c;
  91
  92 /* Random tests.  */
  93
  94 struct StructA
  95 {
  96   int a, b;
  97   int array[10000];
  98   void *ptr;
  99   int bitfield:1;
 100 };
 101
 102 struct StructB
 103 {
 104   int d, ef;
 105   StructA struct_a;
 106   int s:1;
 107   static StructA static_struct_a;
 108   const char *string;
 109 };
 110
 111 /* References.  */
 112
 113 int g_int;
 114 int &g_ref = g_int;
 115
 116 struct StructRef
 117 {
 118   StructRef (unsigned int val) : ref(d) {}
 119
 120   void clear ()
 121   {
 122     d = 0;
 123   }
 124
 125   unsigned int d;
 126   unsigned int &ref;
 127 };
 128
 129 struct StructB struct_b;
 130 struct StructA StructB::static_struct_a;
 131
 132 StructRef g_structref(0x12345678);
 133 StructRef *g_structref_p = &g_structref;
 134
 135 class Base
 136 {
 137 protected:
 138   int x;
 139
 140 public:
 141   Base(void) { x = 2; };
 142 };
 143
 144 class Middle: public virtual Base
 145 {
 146 protected:
 147   int y;
 148
 149 public:
 150   Middle(void): Base() { y = 3; };
 151 };
 152
 153 class Derived: public virtual Middle {
 154 protected:
 155   int z;
 156
 157 public:
 158   Derived(void): Middle() { z = 4; };
 159 };
 160
 161 Derived derived_unavail;
 162 Derived derived_partial;
 163 Derived derived_whole;
 164
 165 struct Virtual {
 166   int z;
 167
 168   virtual ~Virtual() {}
 169 };
 170
 171 Virtual virtual_partial;
 172 Virtual *virtualp = &virtual_partial;
 173
 174 /* Test functions.  */
 175
 176 static void
 177 begin ()        /* called before anything else */
 178 {
 179 }
 180
 181 static void
 182 end ()          /* called after everything else */
 183 {
 184 }
 185
 186 /* Test (not) collecting args.  */
 187
 188 int
 189 args_test_func (char   argc,
 190                 int    argi,
 191                 float  argf,
 192                 double argd,
 193                 test_struct argstruct,
 194                 int argarray[4])
 195 {
 196   int i;
 197
 198   i =  (int) argc + argi + argf + argd + argstruct.memberi + argarray[1];
 199
 200   return i;
 201 }
 202
 203 /* Test (not) collecting array args.  */
 204
 205 /* Test (not) collecting locals.  */
 206
 207 int
 208 local_test_func ()
 209 {
 210   char        locc  = 11;
 211   int         loci  = 12;
 212   float       locf  = 13.3;
 213   double      locd  = 14.4;
 214   test_struct locst;
 215   int         locar[4];
 216   int         i;
 217   struct localstruct {} locdefst;
 218
 219   locst.memberc  = 15;
 220   locst.memberi  = 16;
 221   locst.memberf  = 17.7;
 222   locst.memberd  = 18.8;
 223   locar[0] = 121;
 224   locar[1] = 122;
 225   locar[2] = 123;
 226   locar[3] = 124;
 227
 228   i = /* set local_test_func tracepoint here */
 229     (int) locc + loci + locf + locd + locst.memberi + locar[1];
 230
 231   return i;
 232 }
 233
 234 /* Test collecting register locals.  */
 235
 236 int
 237 reglocal_test_func ()
 238 {
 239   register char        locc = 11;
 240   register int         loci = 12;
 241   register float       locf = 13.3;
 242   register double      locd = 14.4;
 243   register test_struct locst;
 244   register int         locar[4];
 245   int                  i;
 246
 247   locst.memberc  = 15;
 248   locst.memberi  = 16;
 249   locst.memberf  = 17.7;
 250   locst.memberd  = 18.8;
 251   locar[0] = 121;
 252   locar[1] = 122;
 253   locar[2] = 123;
 254   locar[3] = 124;
 255
 256   i = /* set reglocal_test_func tracepoint here */
 257     (int) locc + loci + locf + locd + locst.memberi + locar[1];
 258
 259   return i;
 260 }
 261
 262 /* Test collecting static locals.  */
 263
 264 int
 265 statlocal_test_func ()
 266 {
 267   static   char        locc;
 268   static   int         loci;
 269   static   float       locf;
 270   static   double      locd;
 271   static   test_struct locst;
 272   static   int         locar[4];
 273   int                  i;
 274
 275   locc = 11;
 276   loci = 12;
 277   locf = 13.3;
 278   locd = 14.4;
 279   locst.memberc = 15;
 280   locst.memberi = 16;
 281   locst.memberf = 17.7;
 282   locst.memberd = 18.8;
 283   locar[0] = 121;
 284   locar[1] = 122;
 285   locar[2] = 123;
 286   locar[3] = 124;
 287
 288   i = /* set statlocal_test_func tracepoint here */
 289     (int) locc + loci + locf + locd + locst.memberi + locar[1];
 290
 291   /* Set static locals back to zero so collected values are clearly special. */
 292   locc = 0;
 293   loci = 0;
 294   locf = 0;
 295   locd = 0;
 296   locst.memberc = 0;
 297   locst.memberi = 0;
 298   locst.memberf = 0;
 299   locst.memberd = 0;
 300   locar[0] = 0;
 301   locar[1] = 0;
 302   locar[2] = 0;
 303   locar[3] = 0;
 304
 305   return i;
 306 }
 307
 308 int
 309 globals_test_func ()
 310 {
 311   int i = 0;
 312
 313   i += globalc + globali + globalf + globald;
 314   i += globalstruct.memberc + globalstruct.memberi;
 315   i += globalstruct.memberf + globalstruct.memberd;
 316   i += globalarr[1];
 317
 318   return i;     /* set globals_test_func tracepoint here */
 319 }
 320
 321 int
 322 main (int argc, char **argv, char **envp)
 323 {
 324   int         i = 0;
 325   test_struct mystruct;
 326   int         myarray[4];
 327
 328   begin ();
 329   /* Assign collectable values to global variables.  */
 330   globalc = 71;
 331   globali = 72;
 332   globalf = 73.3;
 333   globald = 74.4;
 334   globalstruct.memberc = 81;
 335   globalstruct.memberi = 82;
 336   globalstruct.memberf = 83.3;
 337   globalstruct.memberd = 84.4;
 338   globalp = &globalstruct;
 339
 340   for (i = 0; i < 15; i++)
 341     globalarr[i] = i;
 342
 343   mystruct.memberc = 101;
 344   mystruct.memberi = 102;
 345   mystruct.memberf = 103.3;
 346   mystruct.memberd = 104.4;
 347   myarray[0] = 111;
 348   myarray[1] = 112;
 349   myarray[2] = 113;
 350   myarray[3] = 114;
 351
 352   g_int = 123;
 353   memset (&struct_b, 0xaa, sizeof struct_b);
 354   memset (&struct_b.static_struct_a, 0xaa, sizeof struct_b.static_struct_a);
 355   struct_b.string = g_const_string;
 356   memcpy (g_string_unavail, g_const_string, sizeof (g_const_string));
 357   memcpy (g_string_partial, g_const_string, sizeof (g_const_string));
 358   g_string_p = g_const_string;
 359   a = 1; b = 2; c = 3;
 360
 361   /* Call test functions, so they can be traced and data collected.  */
 362   i = 0;
 363   i += args_test_func (1, 2, 3.3, 4.4, mystruct, myarray);
 364   i += local_test_func ();
 365   i += reglocal_test_func ();
 366   i += statlocal_test_func ();
 367   i += globals_test_func ();
 368
 369   /* Set 'em back to zero, so that the collected values will be
 370      distinctly different from the "realtime" (end of test) values.  */
 371
 372   globalc = 0;
 373   globali = 0;
 374   globalf = 0;
 375   globald = 0;
 376   globalstruct.memberc = 0;
 377   globalstruct.memberi = 0;
 378   globalstruct.memberf = 0;
 379   globalstruct.memberd = 0;
 380   globalp = 0;
 381   for (i = 0; i < 15; i++)
 382     globalarr[i] = 0;
 383
 384   memset (&struct_b, 0, sizeof struct_b);
 385   memset (&struct_b.static_struct_a, 0, sizeof struct_b.static_struct_a);
 386   struct_b.string = NULL;
 387   memset (g_string_unavail, 0, sizeof (g_string_unavail));
 388   memset (g_string_partial, 0, sizeof (g_string_partial));
 389   g_string_p = NULL;
 390
 391   a = b = c = 0;
 392
 393   g_int = 0;
 394
 395   g_structref.clear ();
 396   g_structref_p = NULL;
 397
 398   end ();
 399   return 0;
 400 }