njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Assertions and panics. m_libcassert.c ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
| 5 | |
| 6 | /* |
| 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
| 9 | |
sewardj | 4d474d0 | 2008-02-11 11:34:59 +0000 | [diff] [blame] | 10 | Copyright (C) 2000-2008 Julian Seward |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 11 | jseward@acm.org |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or |
| 14 | modify it under the terms of the GNU General Public License as |
| 15 | published by the Free Software Foundation; either version 2 of the |
| 16 | License, or (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, but |
| 19 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 26 | 02111-1307, USA. |
| 27 | |
| 28 | The GNU General Public License is contained in the file COPYING. |
| 29 | */ |
| 30 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 31 | #include "pub_core_basics.h" |
sewardj | 4cfea4f | 2006-10-14 19:26:10 +0000 | [diff] [blame] | 32 | #include "pub_core_vki.h" |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 33 | #include "pub_core_vkiscnums.h" |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 34 | #include "pub_core_threadstate.h" |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 35 | #include "pub_core_libcbase.h" |
| 36 | #include "pub_core_libcassert.h" |
| 37 | #include "pub_core_libcprint.h" |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 38 | #include "pub_core_libcproc.h" // For VG_(gettid)() |
| 39 | #include "pub_core_stacktrace.h" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 40 | #include "pub_core_syscall.h" |
njn | e070c20 | 2005-06-20 23:58:15 +0000 | [diff] [blame] | 41 | #include "pub_core_tooliface.h" // For VG_(details).{name,bug_reports_to} |
sewardj | f349d55 | 2005-11-14 17:01:01 +0000 | [diff] [blame] | 42 | #include "pub_core_options.h" // For VG_(clo_xml) |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 43 | |
| 44 | /* --------------------------------------------------------------------- |
| 45 | Assertery. |
| 46 | ------------------------------------------------------------------ */ |
| 47 | |
njn | 9450d24 | 2005-06-26 20:50:05 +0000 | [diff] [blame] | 48 | #if defined(VGP_x86_linux) |
sewardj | 9a699e8 | 2005-11-05 14:22:03 +0000 | [diff] [blame] | 49 | # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| 50 | asm("call m_libcassert_get_ip;" \ |
| 51 | "m_libcassert_get_ip: popl %0;" \ |
| 52 | "movl %%esp, %1;" \ |
| 53 | "movl %%ebp, %2;" \ |
| 54 | : "=r" (pc),\ |
| 55 | "=r" (sp),\ |
njn | 9450d24 | 2005-06-26 20:50:05 +0000 | [diff] [blame] | 56 | "=r" (fp)); |
| 57 | #elif defined(VGP_amd64_linux) |
sewardj | 9a699e8 | 2005-11-05 14:22:03 +0000 | [diff] [blame] | 58 | # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| 59 | asm("leaq 0(%%rip), %0;" \ |
| 60 | "movq %%rsp, %1;" \ |
| 61 | "movq %%rbp, %2;" \ |
| 62 | : "=r" (pc),\ |
| 63 | "=r" (sp),\ |
njn | 9450d24 | 2005-06-26 20:50:05 +0000 | [diff] [blame] | 64 | "=r" (fp)); |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 65 | #elif defined(VGP_ppc32_linux) || defined(VGP_ppc32_aix5) |
sewardj | de616ec | 2005-11-05 14:48:03 +0000 | [diff] [blame] | 66 | # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| 67 | asm("mflr 0;" /* r0 = lr */ \ |
| 68 | "bl m_libcassert_get_ip;" /* lr = pc */ \ |
| 69 | "m_libcassert_get_ip:\n" \ |
| 70 | "mflr %0;" \ |
| 71 | "mtlr 0;" /* restore lr */ \ |
| 72 | "mr %1,1;" \ |
| 73 | "mr %2,1;" \ |
| 74 | : "=r" (pc), \ |
| 75 | "=r" (sp), \ |
| 76 | "=r" (fp) \ |
| 77 | : /* reads none */ \ |
| 78 | : "r0" /* trashed */ ); |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 79 | #elif defined(VGP_ppc64_linux) || defined(VGP_ppc64_aix5) |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 80 | # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| 81 | asm("mflr 0;" /* r0 = lr */ \ |
cerion | 297c88f | 2005-12-22 15:53:12 +0000 | [diff] [blame] | 82 | "bl .m_libcassert_get_ip;" /* lr = pc */ \ |
| 83 | ".m_libcassert_get_ip:\n" \ |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 84 | "mflr %0;" \ |
| 85 | "mtlr 0;" /* restore lr */ \ |
| 86 | "mr %1,1;" \ |
| 87 | "mr %2,1;" \ |
| 88 | : "=r" (pc), \ |
| 89 | "=r" (sp), \ |
| 90 | "=r" (fp) \ |
| 91 | : /* reads none */ \ |
| 92 | : "r0" /* trashed */ ); |
njn | 9450d24 | 2005-06-26 20:50:05 +0000 | [diff] [blame] | 93 | #else |
| 94 | # error Unknown platform |
| 95 | #endif |
| 96 | |
| 97 | #define BACKTRACE_DEPTH 100 // nice and deep! |
njn | 3161e80 | 2005-06-20 03:38:27 +0000 | [diff] [blame] | 98 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 99 | /* Pull down the entire world */ |
| 100 | void VG_(exit)( Int status ) |
| 101 | { |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 102 | # if defined(VGO_linux) |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 103 | (void)VG_(do_syscall1)(__NR_exit_group, status ); |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 104 | # endif |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 105 | (void)VG_(do_syscall1)(__NR_exit, status ); |
| 106 | /* Why are we still alive here? */ |
| 107 | /*NOTREACHED*/ |
| 108 | *(volatile Int *)0 = 'x'; |
| 109 | vg_assert(2+2 == 5); |
| 110 | } |
| 111 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 112 | // Print the scheduler status. |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 113 | void VG_(show_sched_status) ( void ) |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 114 | { |
| 115 | Int i; |
| 116 | VG_(printf)("\nsched status:\n"); |
| 117 | VG_(printf)(" running_tid=%d\n", VG_(get_running_tid)()); |
| 118 | for (i = 1; i < VG_N_THREADS; i++) { |
| 119 | if (VG_(threads)[i].status == VgTs_Empty) continue; |
| 120 | VG_(printf)( "\nThread %d: status = %s\n", i, |
| 121 | VG_(name_of_ThreadStatus)(VG_(threads)[i].status) ); |
| 122 | VG_(get_and_pp_StackTrace)( i, BACKTRACE_DEPTH ); |
| 123 | } |
| 124 | VG_(printf)("\n"); |
| 125 | } |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 126 | |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 127 | __attribute__ ((noreturn)) |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 128 | static void report_and_quit ( const Char* report, |
| 129 | Addr ip, Addr sp, Addr fp, Addr lr ) |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 130 | { |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 131 | Addr stacktop; |
| 132 | Addr ips[BACKTRACE_DEPTH]; |
sewardj | 4278172 | 2006-12-17 19:36:06 +0000 | [diff] [blame] | 133 | ThreadState *tst |
| 134 | = VG_(get_ThreadState)( VG_(lwpid_to_vgtid)( VG_(gettid)() ) ); |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 135 | |
| 136 | // If necessary, fake up an ExeContext which is of our actual real CPU |
| 137 | // state. Could cause problems if we got the panic/exception within the |
| 138 | // execontext/stack dump/symtab code. But it's better than nothing. |
| 139 | if (0 == ip && 0 == sp && 0 == fp) { |
sewardj | 9a699e8 | 2005-11-05 14:22:03 +0000 | [diff] [blame] | 140 | GET_REAL_PC_SP_AND_FP(ip, sp, fp); |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 141 | } |
| 142 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 143 | stacktop = tst->os_state.valgrind_stack_init_SP; |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 144 | |
sewardj | b8b79ad | 2008-03-03 01:35:41 +0000 | [diff] [blame] | 145 | VG_(get_StackTrace_wrk)( |
| 146 | 0/*tid is unknown*/, |
| 147 | ips, BACKTRACE_DEPTH, |
| 148 | NULL/*array to dump SP values in*/, |
| 149 | NULL/*array to dump FP values in*/, |
| 150 | ip, sp, fp, lr, sp, stacktop |
| 151 | ); |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 152 | VG_(pp_StackTrace) (ips, BACKTRACE_DEPTH); |
| 153 | |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 154 | VG_(show_sched_status)(); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 155 | VG_(printf)("\n"); |
| 156 | VG_(printf)("Note: see also the FAQ.txt in the source distribution.\n"); |
| 157 | VG_(printf)("It contains workarounds to several common problems.\n"); |
| 158 | VG_(printf)("\n"); |
| 159 | VG_(printf)("If that doesn't help, please report this bug to: %s\n\n", |
| 160 | report); |
| 161 | VG_(printf)("In the bug report, send all the above text, the valgrind\n"); |
| 162 | VG_(printf)("version, and what Linux distro you are using. Thanks.\n\n"); |
| 163 | VG_(exit)(1); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | void VG_(assert_fail) ( Bool isCore, const Char* expr, const Char* file, |
| 167 | Int line, const Char* fn, const HChar* format, ... ) |
| 168 | { |
| 169 | va_list vargs; |
| 170 | Char buf[256]; |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 171 | Char* component; |
| 172 | Char* bugs_to; |
| 173 | |
| 174 | static Bool entered = False; |
| 175 | if (entered) |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 176 | VG_(exit)(2); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 177 | entered = True; |
| 178 | |
| 179 | va_start(vargs, format); |
njn | aba25b4 | 2005-06-21 04:26:24 +0000 | [diff] [blame] | 180 | VG_(vsprintf) ( buf, format, vargs ); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 181 | va_end(vargs); |
| 182 | |
| 183 | if (isCore) { |
| 184 | component = "valgrind"; |
| 185 | bugs_to = VG_BUGS_TO; |
| 186 | } else { |
| 187 | component = VG_(details).name; |
| 188 | bugs_to = VG_(details).bug_reports_to; |
| 189 | } |
| 190 | |
sewardj | f349d55 | 2005-11-14 17:01:01 +0000 | [diff] [blame] | 191 | if (VG_(clo_xml)) |
| 192 | VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
| 193 | |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 194 | // Treat vg_assert2(0, "foo") specially, as a panicky abort |
| 195 | if (VG_STREQ(expr, "0")) { |
| 196 | VG_(printf)("\n%s: %s:%d (%s): the 'impossible' happened.\n", |
njn | 8a7b41b | 2007-09-23 00:51:24 +0000 | [diff] [blame] | 197 | component, file, line, fn ); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 198 | } else { |
| 199 | VG_(printf)("\n%s: %s:%d (%s): Assertion '%s' failed.\n", |
| 200 | component, file, line, fn, expr ); |
| 201 | } |
| 202 | if (!VG_STREQ(buf, "")) |
| 203 | VG_(printf)("%s: %s\n", component, buf ); |
| 204 | |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 205 | report_and_quit(bugs_to, 0,0,0,0); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | __attribute__ ((noreturn)) |
| 209 | static void panic ( Char* name, Char* report, Char* str, |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 210 | Addr ip, Addr sp, Addr fp, Addr lr ) |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 211 | { |
sewardj | f349d55 | 2005-11-14 17:01:01 +0000 | [diff] [blame] | 212 | if (VG_(clo_xml)) |
| 213 | VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 214 | VG_(printf)("\n%s: the 'impossible' happened:\n %s\n", name, str); |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 215 | report_and_quit(report, ip, sp, fp, lr); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 216 | } |
| 217 | |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 218 | void VG_(core_panic_at) ( Char* str, Addr ip, Addr sp, Addr fp, Addr lr ) |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 219 | { |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 220 | panic("valgrind", VG_BUGS_TO, str, ip, sp, fp, lr); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | void VG_(core_panic) ( Char* str ) |
| 224 | { |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 225 | VG_(core_panic_at)(str, 0,0,0,0); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | void VG_(tool_panic) ( Char* str ) |
| 229 | { |
sewardj | acaec5f | 2005-08-19 16:02:59 +0000 | [diff] [blame] | 230 | panic(VG_(details).name, VG_(details).bug_reports_to, str, 0,0,0,0); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 231 | } |
| 232 | |
njn | 49b45ba | 2005-07-20 02:41:31 +0000 | [diff] [blame] | 233 | /* Print some helpful-ish text about unimplemented things, and give up. */ |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 234 | void VG_(unimplemented) ( Char* msg ) |
| 235 | { |
sewardj | f349d55 | 2005-11-14 17:01:01 +0000 | [diff] [blame] | 236 | if (VG_(clo_xml)) |
| 237 | VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 238 | VG_(message)(Vg_UserMsg, ""); |
| 239 | VG_(message)(Vg_UserMsg, |
| 240 | "Valgrind detected that your program requires"); |
| 241 | VG_(message)(Vg_UserMsg, |
| 242 | "the following unimplemented functionality:"); |
| 243 | VG_(message)(Vg_UserMsg, " %s", msg); |
| 244 | VG_(message)(Vg_UserMsg, |
| 245 | "This may be because the functionality is hard to implement,"); |
| 246 | VG_(message)(Vg_UserMsg, |
| 247 | "or because no reasonable program would behave this way,"); |
| 248 | VG_(message)(Vg_UserMsg, |
| 249 | "or because nobody has yet needed it. In any case, let us know at"); |
| 250 | VG_(message)(Vg_UserMsg, |
| 251 | "%s and/or try to work around the problem, if you can.", VG_BUGS_TO); |
| 252 | VG_(message)(Vg_UserMsg, |
| 253 | ""); |
| 254 | VG_(message)(Vg_UserMsg, |
| 255 | "Valgrind has to exit now. Sorry. Bye!"); |
| 256 | VG_(message)(Vg_UserMsg, |
| 257 | ""); |
sewardj | 745fc45 | 2006-10-17 02:03:11 +0000 | [diff] [blame] | 258 | VG_(show_sched_status)(); |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 259 | VG_(exit)(1); |
| 260 | } |
| 261 | |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 262 | /*--------------------------------------------------------------------*/ |
| 263 | /*--- end ---*/ |
| 264 | /*--------------------------------------------------------------------*/ |
| 265 | |