#include "nsig.h"
#include "number_set.h"
#include "filter.h"
+#include "retval.h"
struct number_set *read_set;
struct number_set *write_set;
intval = find_errno_by_name(val);
if (intval < 1)
return false;
- fopts->data.rval = -intval;
+ fopts->data.rval_idx = retval_new(-intval);
fopts->data.flags |= INJECT_F_RETVAL;
} else if (!fault_tokens_only
&& (val = STR_STRIP_PREFIX(token, "retval=")) != token) {
-(int) intval, intval);
#endif
- fopts->data.rval = intval;
+ fopts->data.rval_idx = retval_new(intval);
fopts->data.flags |= INJECT_F_RETVAL;
} else if (!fault_tokens_only
&& (val = STR_STRIP_PREFIX(token, "signal=")) != token) {
if (!opts.data.flags) {
if (fault_tokens_only) {
/* in fault= syntax the default error code is ENOSYS. */
- opts.data.rval = -ENOSYS;
+ opts.data.rval_idx = retval_new(-ENOSYS);
opts.data.flags |= INJECT_F_RETVAL;
} else {
/* in inject= syntax this is not allowed. */
--- /dev/null
+/*
+ * Copyright (c) 2018 The strace developers.
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "defs.h"
+#include "retval.h"
+
+static kernel_long_t *retval_vec;
+static size_t retval_vec_capacity; /* size of the arena */
+static size_t retval_vec_size; /* size of the used arena */
+
+static void
+expand_retval_vec(void)
+{
+ const size_t old_capacity = retval_vec_capacity;
+ retval_vec = xgrowarray(retval_vec, &retval_vec_capacity,
+ sizeof(*retval_vec));
+ memset(retval_vec + old_capacity, 0,
+ (retval_vec_capacity - old_capacity)
+ * sizeof(*retval_vec));
+}
+
+uint16_t
+retval_new(const kernel_long_t rval)
+{
+ const uint16_t idx = retval_vec_size;
+
+ if (idx < retval_vec_size)
+ error_func_msg_and_die("retval index overflow");
+
+ if (retval_vec_size == retval_vec_capacity)
+ expand_retval_vec();
+
+ retval_vec[idx] = rval;
+ ++retval_vec_size;
+
+ return idx;
+}
+
+kernel_long_t
+retval_get(const uint16_t rval_idx)
+{
+ if (rval_idx >= retval_vec_size)
+ error_func_msg_and_die("rval_idx >= retval_vec_size");
+
+ return retval_vec[rval_idx];
+}
#include "ptrace.h"
#include "nsig.h"
#include "number_set.h"
+#include "retval.h"
#include <limits.h>
/* for struct iovec */
bool update_tcb = false;
- if (opts->data.rval >= 0) {
+ const kernel_long_t inject_rval = retval_get(opts->data.rval_idx);
+ if (inject_rval >= 0) {
kernel_long_t u_rval = tcp->u_rval;
- tcp->u_rval = opts->data.rval;
+ tcp->u_rval = inject_rval;
if (arch_set_success(tcp)) {
tcp->u_rval = u_rval;
} else {
tcp->u_error = 0;
}
} else {
- unsigned long new_error = -opts->data.rval;
+ unsigned long new_error = -inject_rval;
if (new_error != tcp->u_error && new_error <= MAX_ERRNO_VALUE) {
unsigned long u_error = tcp->u_error;