vg_clientfuncs.c - fp2-dev/platform/external/valgrind - Gitiles


 /*--------------------------------------------------------------------*/
 /*--- Code which runs on the simulated CPU.                        ---*/
 /*---                                             vg_clientfuncs.c ---*/
 /*--------------------------------------------------------------------*/

 /*
    This file is part of Valgrind, an x86 protected-mode emulator
    designed for debugging and profiling binaries on x86-Unixes.

    Copyright (C) 2000-2002 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 LICENSE.
 */

 #include "vg_include.h"
 #include "vg_constants.h"

 #include "valgrind.h"   /* for VALGRIND_MAGIC_SEQUENCE */


 /* ---------------------------------------------------------------------
    All the code in this file runs on the SIMULATED CPU.  It is
    intended for various reasons as drop-in replacements for libc
    functions.  These functions have global visibility (obviously) and
    have no prototypes in vg_include.h, since they are not intended to
    be called from within Valgrind.
    ------------------------------------------------------------------ */

 /* ---------------------------------------------------------------------
    Intercepts for the GNU malloc interface.
    ------------------------------------------------------------------ */

 #define SIMPLE_REQUEST1(_qyy_request, _qyy_arg1)                 \
    ({unsigned int _qyy_res;                                      \
     VALGRIND_MAGIC_SEQUENCE(_qyy_res, 0 /* default return */,    \
                             _qyy_request,                        \
                             _qyy_arg1, 0, 0, 0);                 \
     _qyy_res;                                                    \
    })

 #define SIMPLE_REQUEST2(_qyy_request, _qyy_arg1, _qyy_arg2)      \
    ({unsigned int _qyy_res;                                      \
     VALGRIND_MAGIC_SEQUENCE(_qyy_res, 0 /* default return */,    \
                             _qyy_request,                        \
                             _qyy_arg1, _qyy_arg2, 0, 0);         \
     _qyy_res;                                                    \
    })


 /* Below are new versions of malloc, __builtin_new, free,
    __builtin_delete, calloc and realloc.

    malloc, __builtin_new, free, __builtin_delete, calloc and realloc
    can be entered either on the real CPU or the simulated one.  If on
    the real one, this is because the dynamic linker is running the
    static initialisers for C++, before starting up Valgrind itself.
    In this case it is safe to route calls through to
    VG_(malloc)/vg_free, since that is self-initialising.

    Once Valgrind is initialised, vg_running_on_simd_CPU becomes True.
    The call needs to be transferred from the simulated CPU back to the
    real one and routed to the vg_client_* functions.  To do that, the
    client-request mechanism (in valgrind.h) is used to convey requests
    to the scheduler.
 */

 /* ALL calls to malloc wind up here. */
 void* malloc ( Int n )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("malloc[simd=%d](%d)",
                   (UInt)VG_(running_on_simd_CPU), n );
    if (n < 0) {
       v = NULL;
       VG_(message)(Vg_UserMsg,
          "Warning: silly arg (%d) to malloc()", n );
    } else {
       if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

       if (VG_(running_on_simd_CPU)) {
          v = (void*)SIMPLE_REQUEST1(VG_USERREQ__MALLOC, n);
       } else {
          v = VG_(malloc)(VG_AR_CLIENT, n);
       }
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return (void*)v;
 }


 void* __builtin_new ( Int n )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("__builtin_new[simd=%d](%d)",
                   (UInt)VG_(running_on_simd_CPU), n );
    if (n < 0) {
       v = NULL;
       VG_(message)(Vg_UserMsg,
          "Warning: silly arg (%d) to __builtin_new()", n );
    } else {
       if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

       if (VG_(running_on_simd_CPU)) {
          v = (void*)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_NEW, n);
       } else {
          v = VG_(malloc)(VG_AR_CLIENT, n);
       }
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return v;
 }


 void* __builtin_vec_new ( Int n )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("__builtin_vec_new[simd=%d](%d)",
                   (UInt)VG_(running_on_simd_CPU), n );
    if (n < 0) {
       v = NULL;
       VG_(message)(Vg_UserMsg,
          "Warning: silly arg (%d) to __builtin_vec_new()", n );
    } else {
       if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

       if (VG_(running_on_simd_CPU)) {
          v = (void*)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_VEC_NEW, n);
       } else {
          v = VG_(malloc)(VG_AR_CLIENT, n);
       }
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return v;
 }


 void free ( void* p )
 {
    if (VG_(clo_trace_malloc))
       VG_(printf)("free[simd=%d](%p)\n",
                   (UInt)VG_(running_on_simd_CPU), p );
    if (p == NULL)
       return;
    if (VG_(running_on_simd_CPU)) {
       (void)SIMPLE_REQUEST1(VG_USERREQ__FREE, p);
    } else {
       VG_(free)(VG_AR_CLIENT, p);
    }
 }


 void __builtin_delete ( void* p )
 {
    if (VG_(clo_trace_malloc))
       VG_(printf)("__builtin_delete[simd=%d](%p)\n",
                   (UInt)VG_(running_on_simd_CPU), p );
    if (p == NULL)
       return;
    if (VG_(running_on_simd_CPU)) {
       (void)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_DELETE, p);
    } else {
       VG_(free)(VG_AR_CLIENT, p);
    }
 }


 void __builtin_vec_delete ( void* p )
 {
    if (VG_(clo_trace_malloc))
        VG_(printf)("__builtin_vec_delete[simd=%d](%p)\n",
                    (UInt)VG_(running_on_simd_CPU), p );
    if (p == NULL)
       return;
    if (VG_(running_on_simd_CPU)) {
       (void)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_VEC_DELETE, p);
    } else {
       VG_(free)(VG_AR_CLIENT, p);
    }
 }


 void* calloc ( Int nmemb, Int size )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("calloc[simd=%d](%d,%d)",
                   (UInt)VG_(running_on_simd_CPU), nmemb, size );
    if (nmemb < 0 || size < 0) {
       v = NULL;
       VG_(message)(Vg_UserMsg, "Warning: silly args (%d,%d) to calloc()",
                                nmemb, size );
    } else {
       if (VG_(running_on_simd_CPU)) {
          v = (void*)SIMPLE_REQUEST2(VG_USERREQ__CALLOC, nmemb, size);
       } else {
          v = VG_(calloc)(VG_AR_CLIENT, nmemb, size);
       }
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return v;
 }


 void* realloc ( void* ptrV, Int new_size )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("realloc[simd=%d](%p,%d)",
                   (UInt)VG_(running_on_simd_CPU), ptrV, new_size );

    if (VG_(clo_sloppy_malloc))
       { while ((new_size % 4) > 0) new_size++; }

    if (ptrV == NULL)
       return malloc(new_size);
    if (new_size <= 0) {
       free(ptrV);
       if (VG_(clo_trace_malloc))
          VG_(printf)(" = 0\n" );
       return NULL;
    }
    if (VG_(running_on_simd_CPU)) {
       v = (void*)SIMPLE_REQUEST2(VG_USERREQ__REALLOC, ptrV, new_size);
    } else {
       v = VG_(realloc)(VG_AR_CLIENT, ptrV, new_size);
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return v;
 }


 void* memalign ( Int alignment, Int n )
 {
    void* v;

    if (VG_(clo_trace_malloc))
       VG_(printf)("memalign[simd=%d](al %d, size %d)",
                   (UInt)VG_(running_on_simd_CPU), alignment, n );
    if (n < 0) {
       v = NULL;
    } else {
       if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

       if (VG_(running_on_simd_CPU)) {
          v = (void*)SIMPLE_REQUEST2(VG_USERREQ__MEMALIGN, alignment, n);
       } else {
          v = VG_(malloc_aligned)(VG_AR_CLIENT, alignment, n);
       }
    }
    if (VG_(clo_trace_malloc))
       VG_(printf)(" = %p\n", v );
    return (void*)v;
 }


 void* valloc ( Int size )
 {
    return memalign(VKI_BYTES_PER_PAGE, size);
 }


 /* Various compatibility wrapper functions, for glibc and libstdc++. */
 void cfree ( void* p )
 {
    free ( p );
 }


 int mallopt ( int cmd, int value )
 {
    /* In glibc-2.2.4, 1 denotes a successful return value for mallopt */
    return 1;
 }


 int __posix_memalign ( void **memptr, UInt alignment, UInt size )
 {
     void *mem;

     /* Test whether the SIZE argument is valid.  It must be a power of
        two multiple of sizeof (void *).  */
     if (size % sizeof (void *) != 0 || (size & (size - 1)) != 0)
        return VKI_EINVAL /*22*/ /*EINVAL*/;

     mem = memalign (alignment, size);

     if (mem != NULL) {
        *memptr = mem;
        return 0;
     }

     return VKI_ENOMEM /*12*/ /*ENOMEM*/;
 }


 /* Bomb out if we get any of these. */
 /* HACK: We shouldn't call VG_(panic) or VG_(message) on the simulated
    CPU.  Really we should pass the request in the usual way, and
    Valgrind itself can do the panic.  Too tedious, however.
 */
 void pvalloc ( void )
 { VG_(panic)("call to pvalloc\n"); }
 void malloc_stats ( void )
 { VG_(panic)("call to malloc_stats\n"); }
 void malloc_usable_size ( void )
 { VG_(panic)("call to malloc_usable_size\n"); }
 void malloc_trim ( void )
 { VG_(panic)("call to malloc_trim\n"); }
 void malloc_get_state ( void )
 { VG_(panic)("call to malloc_get_state\n"); }
 void malloc_set_state ( void )
 { VG_(panic)("call to malloc_set_state\n"); }


 /* Yet another ugly hack.  Cannot include <malloc.h> because we
    implement functions implemented there with different signatures.
    This struct definition MUST match the system one. */

 /* SVID2/XPG mallinfo structure */
 struct mallinfo {
    int arena;    /* total space allocated from system */
    int ordblks;  /* number of non-inuse chunks */
    int smblks;   /* unused -- always zero */
    int hblks;    /* number of mmapped regions */
    int hblkhd;   /* total space in mmapped regions */
    int usmblks;  /* unused -- always zero */
    int fsmblks;  /* unused -- always zero */
    int uordblks; /* total allocated space */
    int fordblks; /* total non-inuse space */
    int keepcost; /* top-most, releasable (via malloc_trim) space */
 };

 struct mallinfo mallinfo ( void )
 {
    /* Should really try to return something a bit more meaningful */
    Int             i;
    struct mallinfo mi;
    UChar*          pmi = (UChar*)(&mi);
    for (i = 0; i < sizeof(mi); i++)
       pmi[i] = 0;
    return mi;
 }


 /* ---------------------------------------------------------------------
    Replace some C lib things with equivs which don't get
    spurious value warnings.  THEY RUN ON SIMD CPU!
    ------------------------------------------------------------------ */

 char* strrchr ( const char* s, int c )
 {
    UChar  ch   = (UChar)((UInt)c);
    UChar* p    = (UChar*)s;
    UChar* last = NULL;
    while (True) {
       if (*p == ch) last = p;
       if (*p == 0) return last;
       p++;
    }
 }

 char* strchr ( const char* s, int c )
 {
    UChar  ch = (UChar)((UInt)c);
    UChar* p  = (UChar*)s;
    while (True) {
       if (*p == ch) return p;
       if (*p == 0) return NULL;
       p++;
    }
 }

 char* strcat ( char* dest, const char* src )
 {
    Char* dest_orig = dest;
    while (*dest) dest++;
    while (*src) *dest++ = *src++;
    *dest = 0;
    return dest_orig;
 }

 unsigned int strlen ( const char* str )
 {
    UInt i = 0;
    while (str[i] != 0) i++;
    return i;
 }

 char* strcpy ( char* dest, const char* src )
 {
    Char* dest_orig = dest;
    while (*src) *dest++ = *src++;
    *dest = 0;
    return dest_orig;
 }

 int strncmp ( const char* s1, const char* s2, unsigned int nmax )
 {
    unsigned int n = 0;
    while (True) {
       if (n >= nmax) return 0;
       if (*s1 == 0 && *s2 == 0) return 0;
       if (*s1 == 0) return -1;
       if (*s2 == 0) return 1;

       if (*(UChar*)s1 < *(UChar*)s2) return -1;
       if (*(UChar*)s1 > *(UChar*)s2) return 1;

       s1++; s2++; n++;
    }
 }

 int strcmp ( const char* s1, const char* s2 )
 {
    register char c1, c2;
    while (True) {
       c1 = *s1;
       c2 = *s2;
       if (c1 != c2) break;
       if (c1 == 0) break;
       s1++; s2++;
    }
    if (c1 < c2) return -1;
    if (c1 > c2) return 1;
    return 0;
 }

 void* memchr(const void *s, int c, unsigned int n)
 {
    unsigned int i;
    UChar c0 = (UChar)c;
    UChar* p = (UChar*)s;
    for (i = 0; i < n; i++)
       if (p[i] == c0) return (void*)(&p[i]);
    return NULL;
 }

 void* memcpy( void *dst, const void *src, unsigned int len )
 {
     register char *d;
     register char *s;
     if ( dst > src ) {
         d = (char *)dst + len - 1;
         s = (char *)src + len - 1;
         while ( len >= 4 ) {
             *d-- = *s--;
             *d-- = *s--;
             *d-- = *s--;
             *d-- = *s--;
             len -= 4;
 	}
         while ( len-- ) {
             *d-- = *s--;
         }
     } else if ( dst < src ) {
         d = (char *)dst;
         s = (char *)src;
 	while ( len >= 4 ) {
             *d++ = *s++;
             *d++ = *s++;
             *d++ = *s++;
             *d++ = *s++;
             len -= 4;
 	}
         while ( len-- ) {
             *d++ = *s++;
 	}
     }
     return dst;
 }


 /* ---------------------------------------------------------------------
    Horrible hack to make sigsuspend() sort-of work OK.  Same trick as
    for pause() in vg_libpthread.so.
    ------------------------------------------------------------------ */

 /* Horrible because

    -- uses VG_(ksigprocmask), VG_(nanosleep) and vg_assert, which are
       valgrind-native (not intended for client use).

    -- This is here so single-threaded progs (not linking libpthread.so)
       can see it.  But pause() should also be here.  ???
 */

 /* Either libc supplies this (weak) or our libpthread.so supplies it
    (strong) in a threaded setting.
 */
 extern int* __errno_location ( void );


 int sigsuspend ( /* const sigset_t * */ void* mask)
 {
    unsigned int n_orig, n_now;
    struct vki_timespec nanosleep_interval;

    VALGRIND_MAGIC_SEQUENCE(n_orig, 0xFFFFFFFF /* default */,
                            VG_USERREQ__GET_N_SIGS_RETURNED,
                            0, 0, 0, 0);
    vg_assert(n_orig != 0xFFFFFFFF);

    VG_(ksigprocmask)(VKI_SIG_SETMASK, mask, NULL);

    while (1) {
       VALGRIND_MAGIC_SEQUENCE(n_now, 0xFFFFFFFF /* default */,
                               VG_USERREQ__GET_N_SIGS_RETURNED,
                               0, 0, 0, 0);
       vg_assert(n_now != 0xFFFFFFFF);
       vg_assert(n_now >= n_orig);
       if (n_now != n_orig) break;

       nanosleep_interval.tv_sec  = 0;
       nanosleep_interval.tv_nsec = 53 * 1000 * 1000; /* 53 milliseconds */
       /* It's critical here that valgrind's nanosleep implementation
          is nonblocking. */
       VG_(nanosleep)( &nanosleep_interval, NULL);
    }

    /* Maybe this is OK both in single and multithreaded setting. */
    * (__errno_location()) = -VKI_EINTR; /* == EINTR; */
    return -1;
 }

 /*--------------------------------------------------------------------*/
 /*--- end                                         vg_clientfuncs.c ---*/
 /*--------------------------------------------------------------------*/

	/--------------------------------------------------------------------/
	/--- Code which runs on the simulated CPU. ---/
	/--- vg_clientfuncs.c ---/
	/--------------------------------------------------------------------/

	/*
	This file is part of Valgrind, an x86 protected-mode emulator
	designed for debugging and profiling binaries on x86-Unixes.

	Copyright (C) 2000-2002 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 LICENSE.
	*/

	#include "vg_include.h"
	#include "vg_constants.h"

	#include "valgrind.h" /* for VALGRIND_MAGIC_SEQUENCE */


	/* ---------------------------------------------------------------------
	All the code in this file runs on the SIMULATED CPU. It is
	intended for various reasons as drop-in replacements for libc
	functions. These functions have global visibility (obviously) and
	have no prototypes in vg_include.h, since they are not intended to
	be called from within Valgrind.
	------------------------------------------------------------------ */

	/* ---------------------------------------------------------------------
	Intercepts for the GNU malloc interface.
	------------------------------------------------------------------ */

	#define SIMPLE_REQUEST1(_qyy_request, _qyy_arg1) \
	({unsigned int _qyy_res; \
	VALGRIND_MAGIC_SEQUENCE(_qyy_res, 0 /* default return */, \
	_qyy_request, \
	_qyy_arg1, 0, 0, 0); \
	_qyy_res; \
	})

	#define SIMPLE_REQUEST2(_qyy_request, _qyy_arg1, _qyy_arg2) \
	({unsigned int _qyy_res; \
	VALGRIND_MAGIC_SEQUENCE(_qyy_res, 0 /* default return */, \
	_qyy_request, \
	_qyy_arg1, _qyy_arg2, 0, 0); \
	_qyy_res; \
	})


	/* Below are new versions of malloc, __builtin_new, free,
	__builtin_delete, calloc and realloc.

	malloc, __builtin_new, free, __builtin_delete, calloc and realloc
	can be entered either on the real CPU or the simulated one. If on
	the real one, this is because the dynamic linker is running the
	static initialisers for C++, before starting up Valgrind itself.
	In this case it is safe to route calls through to
	VG_(malloc)/vg_free, since that is self-initialising.

	Once Valgrind is initialised, vg_running_on_simd_CPU becomes True.
	The call needs to be transferred from the simulated CPU back to the
	real one and routed to the vg_client_* functions. To do that, the
	client-request mechanism (in valgrind.h) is used to convey requests
	to the scheduler.
	*/

	/* ALL calls to malloc wind up here. */
	void* malloc ( Int n )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("malloc[simd=%d](%d)",
	(UInt)VG_(running_on_simd_CPU), n );
	if (n < 0) {
	v = NULL;
	VG_(message)(Vg_UserMsg,
	"Warning: silly arg (%d) to malloc()", n );
	} else {
	if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST1(VG_USERREQ__MALLOC, n);
	} else {
	v = VG_(malloc)(VG_AR_CLIENT, n);
	}
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return (void*)v;
	}


	void* __builtin_new ( Int n )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("__builtin_new[simd=%d](%d)",
	(UInt)VG_(running_on_simd_CPU), n );
	if (n < 0) {
	v = NULL;
	VG_(message)(Vg_UserMsg,
	"Warning: silly arg (%d) to __builtin_new()", n );
	} else {
	if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_NEW, n);
	} else {
	v = VG_(malloc)(VG_AR_CLIENT, n);
	}
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return v;
	}


	void* __builtin_vec_new ( Int n )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("__builtin_vec_new[simd=%d](%d)",
	(UInt)VG_(running_on_simd_CPU), n );
	if (n < 0) {
	v = NULL;
	VG_(message)(Vg_UserMsg,
	"Warning: silly arg (%d) to __builtin_vec_new()", n );
	} else {
	if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_VEC_NEW, n);
	} else {
	v = VG_(malloc)(VG_AR_CLIENT, n);
	}
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return v;
	}


	void free ( void* p )
	{
	if (VG_(clo_trace_malloc))
	VG_(printf)("free[simd=%d](%p)\n",
	(UInt)VG_(running_on_simd_CPU), p );
	if (p == NULL)
	return;
	if (VG_(running_on_simd_CPU)) {
	(void)SIMPLE_REQUEST1(VG_USERREQ__FREE, p);
	} else {
	VG_(free)(VG_AR_CLIENT, p);
	}
	}


	void __builtin_delete ( void* p )
	{
	if (VG_(clo_trace_malloc))
	VG_(printf)("__builtin_delete[simd=%d](%p)\n",
	(UInt)VG_(running_on_simd_CPU), p );
	if (p == NULL)
	return;
	if (VG_(running_on_simd_CPU)) {
	(void)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_DELETE, p);
	} else {
	VG_(free)(VG_AR_CLIENT, p);
	}
	}


	void __builtin_vec_delete ( void* p )
	{
	if (VG_(clo_trace_malloc))
	VG_(printf)("__builtin_vec_delete[simd=%d](%p)\n",
	(UInt)VG_(running_on_simd_CPU), p );
	if (p == NULL)
	return;
	if (VG_(running_on_simd_CPU)) {
	(void)SIMPLE_REQUEST1(VG_USERREQ__BUILTIN_VEC_DELETE, p);
	} else {
	VG_(free)(VG_AR_CLIENT, p);
	}
	}


	void* calloc ( Int nmemb, Int size )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("calloc[simd=%d](%d,%d)",
	(UInt)VG_(running_on_simd_CPU), nmemb, size );
	if (nmemb < 0 \|\| size < 0) {
	v = NULL;
	VG_(message)(Vg_UserMsg, "Warning: silly args (%d,%d) to calloc()",
	nmemb, size );
	} else {
	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST2(VG_USERREQ__CALLOC, nmemb, size);
	} else {
	v = VG_(calloc)(VG_AR_CLIENT, nmemb, size);
	}
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return v;
	}


	void* realloc ( void* ptrV, Int new_size )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("realloc[simd=%d](%p,%d)",
	(UInt)VG_(running_on_simd_CPU), ptrV, new_size );

	if (VG_(clo_sloppy_malloc))
	{ while ((new_size % 4) > 0) new_size++; }

	if (ptrV == NULL)
	return malloc(new_size);
	if (new_size <= 0) {
	free(ptrV);
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = 0\n" );
	return NULL;
	}
	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST2(VG_USERREQ__REALLOC, ptrV, new_size);
	} else {
	v = VG_(realloc)(VG_AR_CLIENT, ptrV, new_size);
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return v;
	}


	void* memalign ( Int alignment, Int n )
	{
	void* v;

	if (VG_(clo_trace_malloc))
	VG_(printf)("memalign[simd=%d](al %d, size %d)",
	(UInt)VG_(running_on_simd_CPU), alignment, n );
	if (n < 0) {
	v = NULL;
	} else {
	if (VG_(clo_sloppy_malloc)) { while ((n % 4) > 0) n++; }

	if (VG_(running_on_simd_CPU)) {
	v = (void*)SIMPLE_REQUEST2(VG_USERREQ__MEMALIGN, alignment, n);
	} else {
	v = VG_(malloc_aligned)(VG_AR_CLIENT, alignment, n);
	}
	}
	if (VG_(clo_trace_malloc))
	VG_(printf)(" = %p\n", v );
	return (void*)v;
	}


	void* valloc ( Int size )
	{
	return memalign(VKI_BYTES_PER_PAGE, size);
	}


	/* Various compatibility wrapper functions, for glibc and libstdc++. */
	void cfree ( void* p )
	{
	free ( p );
	}


	int mallopt ( int cmd, int value )
	{
	/* In glibc-2.2.4, 1 denotes a successful return value for mallopt */
	return 1;
	}


	int __posix_memalign ( void **memptr, UInt alignment, UInt size )
	{
	void *mem;

	/* Test whether the SIZE argument is valid. It must be a power of
	two multiple of sizeof (void ). /
	if (size % sizeof (void *) != 0 \|\| (size & (size - 1)) != 0)
	return VKI_EINVAL /22/ /EINVAL/;

	mem = memalign (alignment, size);

	if (mem != NULL) {
	*memptr = mem;
	return 0;
	}

	return VKI_ENOMEM /12/ /ENOMEM/;
	}


	/* Bomb out if we get any of these. */
	/* HACK: We shouldn't call VG_(panic) or VG_(message) on the simulated
	CPU. Really we should pass the request in the usual way, and
	Valgrind itself can do the panic. Too tedious, however.
	*/
	void pvalloc ( void )
	{ VG_(panic)("call to pvalloc\n"); }
	void malloc_stats ( void )
	{ VG_(panic)("call to malloc_stats\n"); }
	void malloc_usable_size ( void )
	{ VG_(panic)("call to malloc_usable_size\n"); }
	void malloc_trim ( void )
	{ VG_(panic)("call to malloc_trim\n"); }
	void malloc_get_state ( void )
	{ VG_(panic)("call to malloc_get_state\n"); }
	void malloc_set_state ( void )
	{ VG_(panic)("call to malloc_set_state\n"); }


	/* Yet another ugly hack. Cannot include <malloc.h> because we
	implement functions implemented there with different signatures.
	This struct definition MUST match the system one. */

	/* SVID2/XPG mallinfo structure */
	struct mallinfo {
	int arena; /* total space allocated from system */
	int ordblks; /* number of non-inuse chunks */
	int smblks; /* unused -- always zero */
	int hblks; /* number of mmapped regions */
	int hblkhd; /* total space in mmapped regions */
	int usmblks; /* unused -- always zero */
	int fsmblks; /* unused -- always zero */
	int uordblks; /* total allocated space */
	int fordblks; /* total non-inuse space */
	int keepcost; /* top-most, releasable (via malloc_trim) space */
	};

	struct mallinfo mallinfo ( void )
	{
	/* Should really try to return something a bit more meaningful */
	Int i;
	struct mallinfo mi;
	UChar* pmi = (UChar*)(&mi);
	for (i = 0; i < sizeof(mi); i++)
	pmi[i] = 0;
	return mi;
	}


	/* ---------------------------------------------------------------------
	Replace some C lib things with equivs which don't get
	spurious value warnings. THEY RUN ON SIMD CPU!
	------------------------------------------------------------------ */

	char* strrchr ( const char* s, int c )
	{
	UChar ch = (UChar)((UInt)c);
	UChar* p = (UChar*)s;
	UChar* last = NULL;
	while (True) {
	if (*p == ch) last = p;
	if (*p == 0) return last;
	p++;
	}
	}

	char* strchr ( const char* s, int c )
	{
	UChar ch = (UChar)((UInt)c);
	UChar* p = (UChar*)s;
	while (True) {
	if (*p == ch) return p;
	if (*p == 0) return NULL;
	p++;
	}
	}

	char* strcat ( char* dest, const char* src )
	{
	Char* dest_orig = dest;
	while (*dest) dest++;
	while (src) dest++ = *src++;
	*dest = 0;
	return dest_orig;
	}

	unsigned int strlen ( const char* str )
	{
	UInt i = 0;
	while (str[i] != 0) i++;
	return i;
	}

	char* strcpy ( char* dest, const char* src )
	{
	Char* dest_orig = dest;
	while (src) dest++ = *src++;
	*dest = 0;
	return dest_orig;
	}

	int strncmp ( const char* s1, const char* s2, unsigned int nmax )
	{
	unsigned int n = 0;
	while (True) {
	if (n >= nmax) return 0;
	if (s1 == 0 && s2 == 0) return 0;
	if (*s1 == 0) return -1;
	if (*s2 == 0) return 1;

	if ((UChar)s1 < (UChar)s2) return -1;
	if ((UChar)s1 > (UChar)s2) return 1;

	s1++; s2++; n++;
	}
	}

	int strcmp ( const char* s1, const char* s2 )
	{
	register char c1, c2;
	while (True) {
	c1 = *s1;
	c2 = *s2;
	if (c1 != c2) break;
	if (c1 == 0) break;
	s1++; s2++;
	}
	if (c1 < c2) return -1;
	if (c1 > c2) return 1;
	return 0;
	}

	void* memchr(const void *s, int c, unsigned int n)
	{
	unsigned int i;
	UChar c0 = (UChar)c;
	UChar* p = (UChar*)s;
	for (i = 0; i < n; i++)
	if (p[i] == c0) return (void*)(&p[i]);
	return NULL;
	}

	void* memcpy( void dst, const void src, unsigned int len )
	{
	register char *d;
	register char *s;
	if ( dst > src ) {
	d = (char *)dst + len - 1;
	s = (char *)src + len - 1;
	while ( len >= 4 ) {
	d-- = s--;
	d-- = s--;
	d-- = s--;
	d-- = s--;
	len -= 4;
	}
	while ( len-- ) {
	d-- = s--;
	}
	} else if ( dst < src ) {
	d = (char *)dst;
	s = (char *)src;
	while ( len >= 4 ) {
	d++ = s++;
	d++ = s++;
	d++ = s++;
	d++ = s++;
	len -= 4;
	}
	while ( len-- ) {
	d++ = s++;
	}
	}
	return dst;
	}


	/* ---------------------------------------------------------------------
	Horrible hack to make sigsuspend() sort-of work OK. Same trick as
	for pause() in vg_libpthread.so.
	------------------------------------------------------------------ */

	/* Horrible because

	-- uses VG_(ksigprocmask), VG_(nanosleep) and vg_assert, which are
	valgrind-native (not intended for client use).

	-- This is here so single-threaded progs (not linking libpthread.so)
	can see it. But pause() should also be here. ???
	*/

	/* Either libc supplies this (weak) or our libpthread.so supplies it
	(strong) in a threaded setting.
	*/
	extern int* __errno_location ( void );


	int sigsuspend ( /* const sigset_t * / void mask)
	{
	unsigned int n_orig, n_now;
	struct vki_timespec nanosleep_interval;

	VALGRIND_MAGIC_SEQUENCE(n_orig, 0xFFFFFFFF /* default */,
	VG_USERREQ__GET_N_SIGS_RETURNED,
	0, 0, 0, 0);
	vg_assert(n_orig != 0xFFFFFFFF);

	VG_(ksigprocmask)(VKI_SIG_SETMASK, mask, NULL);

	while (1) {
	VALGRIND_MAGIC_SEQUENCE(n_now, 0xFFFFFFFF /* default */,
	VG_USERREQ__GET_N_SIGS_RETURNED,
	0, 0, 0, 0);
	vg_assert(n_now != 0xFFFFFFFF);
	vg_assert(n_now >= n_orig);
	if (n_now != n_orig) break;

	nanosleep_interval.tv_sec = 0;
	nanosleep_interval.tv_nsec = 53 * 1000 * 1000; /* 53 milliseconds */
	/* It's critical here that valgrind's nanosleep implementation
	is nonblocking. */
	VG_(nanosleep)( &nanosleep_interval, NULL);
	}

	/* Maybe this is OK both in single and multithreaded setting. */
	* (__errno_location()) = -VKI_EINTR; /* == EINTR; */
	return -1;
	}

	/--------------------------------------------------------------------/
	/--- end vg_clientfuncs.c ---/
	/--------------------------------------------------------------------/