| |
| /*--------------------------------------------------------------------*/ |
| /*--- Assertions and panics. m_libcassert.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2006 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_vki.h" |
| #include "pub_core_threadstate.h" |
| #include "pub_core_libcbase.h" |
| #include "pub_core_libcassert.h" |
| #include "pub_core_libcprint.h" |
| #include "pub_core_libcproc.h" // For VG_(gettid)() |
| #include "pub_core_stacktrace.h" |
| #include "pub_core_syscall.h" |
| #include "pub_core_tooliface.h" // For VG_(details).{name,bug_reports_to} |
| #include "pub_core_options.h" // For VG_(clo_xml) |
| #include "pub_core_vkiscnums.h" |
| |
| /* --------------------------------------------------------------------- |
| Assertery. |
| ------------------------------------------------------------------ */ |
| |
| #if defined(VGP_x86_linux) |
| # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| asm("call m_libcassert_get_ip;" \ |
| "m_libcassert_get_ip: popl %0;" \ |
| "movl %%esp, %1;" \ |
| "movl %%ebp, %2;" \ |
| : "=r" (pc),\ |
| "=r" (sp),\ |
| "=r" (fp)); |
| #elif defined(VGP_amd64_linux) |
| # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| asm("leaq 0(%%rip), %0;" \ |
| "movq %%rsp, %1;" \ |
| "movq %%rbp, %2;" \ |
| : "=r" (pc),\ |
| "=r" (sp),\ |
| "=r" (fp)); |
| #elif defined(VGP_ppc32_linux) |
| # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| asm("mflr 0;" /* r0 = lr */ \ |
| "bl m_libcassert_get_ip;" /* lr = pc */ \ |
| "m_libcassert_get_ip:\n" \ |
| "mflr %0;" \ |
| "mtlr 0;" /* restore lr */ \ |
| "mr %1,1;" \ |
| "mr %2,1;" \ |
| : "=r" (pc), \ |
| "=r" (sp), \ |
| "=r" (fp) \ |
| : /* reads none */ \ |
| : "r0" /* trashed */ ); |
| #elif defined(VGP_ppc64_linux) |
| # define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \ |
| asm("mflr 0;" /* r0 = lr */ \ |
| "bl .m_libcassert_get_ip;" /* lr = pc */ \ |
| ".m_libcassert_get_ip:\n" \ |
| "mflr %0;" \ |
| "mtlr 0;" /* restore lr */ \ |
| "mr %1,1;" \ |
| "mr %2,1;" \ |
| : "=r" (pc), \ |
| "=r" (sp), \ |
| "=r" (fp) \ |
| : /* reads none */ \ |
| : "r0" /* trashed */ ); |
| #else |
| # error Unknown platform |
| #endif |
| |
| #define BACKTRACE_DEPTH 100 // nice and deep! |
| |
| /* Pull down the entire world */ |
| void VG_(exit)( Int status ) |
| { |
| (void)VG_(do_syscall1)(__NR_exit_group, status ); |
| (void)VG_(do_syscall1)(__NR_exit, status ); |
| /* Why are we still alive here? */ |
| /*NOTREACHED*/ |
| *(volatile Int *)0 = 'x'; |
| vg_assert(2+2 == 5); |
| } |
| |
| // Print the scheduler status. |
| static void pp_sched_status ( void ) |
| { |
| Int i; |
| VG_(printf)("\nsched status:\n"); |
| VG_(printf)(" running_tid=%d\n", VG_(get_running_tid)()); |
| for (i = 1; i < VG_N_THREADS; i++) { |
| if (VG_(threads)[i].status == VgTs_Empty) continue; |
| VG_(printf)( "\nThread %d: status = %s\n", i, |
| VG_(name_of_ThreadStatus)(VG_(threads)[i].status) ); |
| VG_(get_and_pp_StackTrace)( i, BACKTRACE_DEPTH ); |
| } |
| VG_(printf)("\n"); |
| } |
| |
| __attribute__ ((noreturn)) |
| static void report_and_quit ( const Char* report, |
| Addr ip, Addr sp, Addr fp, Addr lr ) |
| { |
| Addr stacktop; |
| Addr ips[BACKTRACE_DEPTH]; |
| ThreadState *tst = VG_(get_ThreadState)( VG_(get_lwp_tid)(VG_(gettid)()) ); |
| |
| // If necessary, fake up an ExeContext which is of our actual real CPU |
| // state. Could cause problems if we got the panic/exception within the |
| // execontext/stack dump/symtab code. But it's better than nothing. |
| if (0 == ip && 0 == sp && 0 == fp) { |
| GET_REAL_PC_SP_AND_FP(ip, sp, fp); |
| } |
| |
| stacktop = tst->os_state.valgrind_stack_init_SP; |
| |
| VG_(get_StackTrace2)(0/*tid is unknown*/, |
| ips, BACKTRACE_DEPTH, ip, sp, fp, lr, sp, stacktop); |
| VG_(pp_StackTrace) (ips, BACKTRACE_DEPTH); |
| |
| // Don't print this, as it's not terribly interesting and avoids a |
| // dependence on m_scheduler/, which would be crazy. |
| //VG_(printf)("\nBasic block ctr is approximately %llu\n", VG_(bbs_done) ); |
| |
| pp_sched_status(); |
| VG_(printf)("\n"); |
| VG_(printf)("Note: see also the FAQ.txt in the source distribution.\n"); |
| VG_(printf)("It contains workarounds to several common problems.\n"); |
| VG_(printf)("\n"); |
| VG_(printf)("If that doesn't help, please report this bug to: %s\n\n", |
| report); |
| VG_(printf)("In the bug report, send all the above text, the valgrind\n"); |
| VG_(printf)("version, and what Linux distro you are using. Thanks.\n\n"); |
| VG_(exit)(1); |
| } |
| |
| void VG_(assert_fail) ( Bool isCore, const Char* expr, const Char* file, |
| Int line, const Char* fn, const HChar* format, ... ) |
| { |
| va_list vargs; |
| Char buf[256]; |
| Char* component; |
| Char* bugs_to; |
| |
| static Bool entered = False; |
| if (entered) |
| VG_(exit)(2); |
| entered = True; |
| |
| va_start(vargs, format); |
| VG_(vsprintf) ( buf, format, vargs ); |
| va_end(vargs); |
| |
| if (isCore) { |
| component = "valgrind"; |
| bugs_to = VG_BUGS_TO; |
| } else { |
| component = VG_(details).name; |
| bugs_to = VG_(details).bug_reports_to; |
| } |
| |
| if (VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
| |
| // Treat vg_assert2(0, "foo") specially, as a panicky abort |
| if (VG_STREQ(expr, "0")) { |
| VG_(printf)("\n%s: %s:%d (%s): the 'impossible' happened.\n", |
| component, file, line, fn, expr ); |
| } else { |
| VG_(printf)("\n%s: %s:%d (%s): Assertion '%s' failed.\n", |
| component, file, line, fn, expr ); |
| } |
| if (!VG_STREQ(buf, "")) |
| VG_(printf)("%s: %s\n", component, buf ); |
| |
| report_and_quit(bugs_to, 0,0,0,0); |
| } |
| |
| __attribute__ ((noreturn)) |
| static void panic ( Char* name, Char* report, Char* str, |
| Addr ip, Addr sp, Addr fp, Addr lr ) |
| { |
| if (VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
| VG_(printf)("\n%s: the 'impossible' happened:\n %s\n", name, str); |
| report_and_quit(report, ip, sp, fp, lr); |
| } |
| |
| void VG_(core_panic_at) ( Char* str, Addr ip, Addr sp, Addr fp, Addr lr ) |
| { |
| panic("valgrind", VG_BUGS_TO, str, ip, sp, fp, lr); |
| } |
| |
| void VG_(core_panic) ( Char* str ) |
| { |
| VG_(core_panic_at)(str, 0,0,0,0); |
| } |
| |
| void VG_(tool_panic) ( Char* str ) |
| { |
| panic(VG_(details).name, VG_(details).bug_reports_to, str, 0,0,0,0); |
| } |
| |
| /* Print some helpful-ish text about unimplemented things, and give up. */ |
| void VG_(unimplemented) ( Char* msg ) |
| { |
| if (VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "</valgrindoutput>\n"); |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, |
| "Valgrind detected that your program requires"); |
| VG_(message)(Vg_UserMsg, |
| "the following unimplemented functionality:"); |
| VG_(message)(Vg_UserMsg, " %s", msg); |
| VG_(message)(Vg_UserMsg, |
| "This may be because the functionality is hard to implement,"); |
| VG_(message)(Vg_UserMsg, |
| "or because no reasonable program would behave this way,"); |
| VG_(message)(Vg_UserMsg, |
| "or because nobody has yet needed it. In any case, let us know at"); |
| VG_(message)(Vg_UserMsg, |
| "%s and/or try to work around the problem, if you can.", VG_BUGS_TO); |
| VG_(message)(Vg_UserMsg, |
| ""); |
| VG_(message)(Vg_UserMsg, |
| "Valgrind has to exit now. Sorry. Bye!"); |
| VG_(message)(Vg_UserMsg, |
| ""); |
| pp_sched_status(); |
| VG_(exit)(1); |
| } |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |
| |