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/*--------------------------------------------------------------------*/
/*--- Assertions and panics. m_libcassert.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2009 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_vkiscnums.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)
/* ---------------------------------------------------------------------
Assertery.
------------------------------------------------------------------ */
#if defined(VGP_x86_linux)
# define GET_REAL_PC_SP_AND_FP(pc, sp, fp) \
asm("call 0f;" \
"0: 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) || defined(VGP_ppc32_aix5)
# 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) || defined(VGP_ppc64_aix5)
# 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 )
{
# if defined(VGO_linux)
(void)VG_(do_syscall1)(__NR_exit_group, status );
# endif
(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.
void VG_(show_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_(lwpid_to_vgtid)( 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_StackTrace_wrk)(
0/*tid is unknown*/,
ips, BACKTRACE_DEPTH,
NULL/*array to dump SP values in*/,
NULL/*array to dump FP values in*/,
ip, sp, fp, lr, sp, stacktop
);
VG_(pp_StackTrace) (ips, BACKTRACE_DEPTH);
VG_(show_sched_status)();
VG_(printf)(
"\n"
"Note: see also the FAQ in the source distribution.\n"
"It contains workarounds to several common problems.\n"
"In particular, if Valgrind aborted or crashed after\n"
"identifying problems in your program, there's a good chance\n"
"that fixing those problems will prevent Valgrind aborting or\n"
"crashing, especially if it happened in m_mallocfree.c.\n"
"\n"
"If that doesn't help, please report this bug to: %s\n\n"
"In the bug report, send all the above text, the valgrind\n"
"version, and what OS and version you are using. Thanks.\n\n",
report);
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_UMSG("</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 );
} 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_UMSG("</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_UMSG("</valgrindoutput>\n");
VG_UMSG("");
VG_UMSG("Valgrind detected that your program requires");
VG_UMSG("the following unimplemented functionality:");
VG_UMSG(" %s", msg);
VG_UMSG("This may be because the functionality is hard to implement,");
VG_UMSG("or because no reasonable program would behave this way,");
VG_UMSG("or because nobody has yet needed it. In any case, let us know at");
VG_UMSG("%s and/or try to work around the problem, if you can.", VG_BUGS_TO);
VG_UMSG("");
VG_UMSG("Valgrind has to exit now. Sorry. Bye!");
VG_UMSG("");
VG_(show_sched_status)();
VG_(exit)(1);
}
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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