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Diffstat (limited to 'tools/regression/redzone9/redzone.c')
| -rw-r--r-- | tools/regression/redzone9/redzone.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/tools/regression/redzone9/redzone.c b/tools/regression/redzone9/redzone.c new file mode 100644 index 000000000000..579e5a08cda7 --- /dev/null +++ b/tools/regression/redzone9/redzone.c @@ -0,0 +1,138 @@ +/*- + * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/linker.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/sysctl.h> + + +SYSCTL_NODE(_debug, OID_AUTO, redzone, CTLFLAG_RW, 0, ""); + +#define REDZONE_MALLOC_UNDERFLOW 0 +#define REDZONE_MALLOC_OVERFLOW 1 +#define REDZONE_REALLOC_SMALLER_UNDERFLOW 2 +#define REDZONE_REALLOC_SMALLER_OVERFLOW 3 +#define REDZONE_REALLOC_BIGGER_UNDERFLOW 4 +#define REDZONE_REALLOC_BIGGER_OVERFLOW 5 + +static int +redzone_sysctl(SYSCTL_HANDLER_ARGS) +{ + u_char *p = NULL; + int error, val = 0; + + error = sysctl_handle_int(oidp, &val, sizeof(val), req); + if (error != 0 || req->newptr == NULL) + return (0); + switch (arg2) { + case REDZONE_MALLOC_UNDERFLOW: + p = malloc(10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[-1] = '\0'; + break; + case REDZONE_MALLOC_OVERFLOW: + p = malloc(10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[10] = '\0'; + break; + case REDZONE_REALLOC_SMALLER_UNDERFLOW: + p = malloc(8192, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[-1] = '\0'; + p = realloc(p, 10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + break; + case REDZONE_REALLOC_SMALLER_OVERFLOW: + p = malloc(8192, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[8192] = '\0'; + p = realloc(p, 10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + break; + case REDZONE_REALLOC_BIGGER_UNDERFLOW: + p = malloc(10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[-1] = '\0'; + p = realloc(p, 8192, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + break; + case REDZONE_REALLOC_BIGGER_OVERFLOW: + p = malloc(10, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + p[10] = '\0'; + p = realloc(p, 8192, M_TEMP, M_NOWAIT); + if (p == NULL) + return (ENOMEM); + break; + } + free(p, M_TEMP); + return (0); +} +SYSCTL_PROC(_debug_redzone, OID_AUTO, malloc_underflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_MALLOC_UNDERFLOW, redzone_sysctl, "I", ""); +SYSCTL_PROC(_debug_redzone, OID_AUTO, malloc_overflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_MALLOC_OVERFLOW, redzone_sysctl, "I", ""); +SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_smaller_underflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_REALLOC_SMALLER_UNDERFLOW, redzone_sysctl, "I", ""); +SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_smaller_overflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_REALLOC_SMALLER_OVERFLOW, redzone_sysctl, "I", ""); +SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_bigger_underflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_REALLOC_BIGGER_UNDERFLOW, redzone_sysctl, "I", ""); +SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_bigger_overflow, CTLTYPE_INT | CTLFLAG_RW, + NULL, REDZONE_REALLOC_BIGGER_OVERFLOW, redzone_sysctl, "I", ""); + +static int +redzone_modevent(module_t mod, int type, void *data) +{ + + switch (type) { + case MOD_LOAD: + case MOD_UNLOAD: + break; + default: + return (EOPNOTSUPP); + } + return (0); +} +static moduledata_t redzone_module = { + "redzone", + redzone_modevent, + NULL +}; +DECLARE_MODULE(redzone, redzone_module, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); |