lttng-abi: Document ioctl numbers reserved by lttng-abi-old.h

[lttng-modules.git] / lttng-filter-interpreter.c

diff --git a/lttng-filter-interpreter.c b/lttng-filter-interpreter.c
index b1e5ba7360261a651386ebfa4485093a4a566237..3dad6cc6650830f2990ec410f09b523dd59573d3 100644 (file)
--- a/lttng-filter-interpreter.c
+++ b/lttng-filter-interpreter.c
@@ -1,30 +1,13 @@
-/*
+/* SPDX-License-Identifier: MIT
+ *
  * lttng-filter-interpreter.c
  *
  * LTTng modules filter interpreter.
  *
  * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
  */
 
-#include <linux/uaccess.h>
+#include <wrapper/uaccess.h>
 #include <wrapper/frame.h>
 #include <wrapper/types.h>
 #include <linux/swab.h>
@@ -47,7 +30,7 @@ char get_char(struct estack_entry *reg, size_t offset)
                char c;
 
                /* Handle invalid access as end of string. */
-               if (unlikely(!access_ok(VERIFY_READ,
+               if (unlikely(!lttng_access_ok(VERIFY_READ,
                                reg->u.s.user_str + offset,
                                sizeof(c))))
                        return '\0';
@@ -572,7 +555,7 @@ static int dynamic_load_field(struct estack_entry *stack_top)
                        ret = -EINVAL;
                        goto end;
                }
-               stack_top->u.s.seq_len = SIZE_MAX;
+               stack_top->u.s.seq_len = LTTNG_SIZE_MAX;
                stack_top->u.s.literal_type =
                        ESTACK_STRING_LITERAL_TYPE_NONE;
                break;
@@ -771,6 +754,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE,
 
                [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT,
+
+               [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64,
        };
 #endif /* #ifndef INTERPRETER_USE_SWITCH */
 
@@ -788,6 +773,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                        goto end;
 
                OP(FILTER_OP_RETURN):
+               OP(FILTER_OP_RETURN_S64):
                        /* LTTNG_FILTER_DISCARD  or LTTNG_FILTER_RECORD_FLAG */
                        retval = !!estack_ax_v;
                        ret = 0;
@@ -995,7 +981,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                                ret = -EINVAL;
                                goto end;
                        }
-                       res = (estack_bx_v >> estack_ax_v);
+                       res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v);
                        estack_pop(stack, top, ax, bx);
                        estack_ax_v = res;
                        next_pc += sizeof(struct binary_op);
@@ -1010,7 +996,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                                ret = -EINVAL;
                                goto end;
                        }
-                       res = (estack_bx_v << estack_ax_v);
+                       res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v);
                        estack_pop(stack, top, ax, bx);
                        estack_ax_v = res;
                        next_pc += sizeof(struct binary_op);
@@ -1020,7 +1006,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                {
                        int64_t res;
 
-                       res = (estack_bx_v & estack_ax_v);
+                       res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v);
                        estack_pop(stack, top, ax, bx);
                        estack_ax_v = res;
                        next_pc += sizeof(struct binary_op);
@@ -1030,7 +1016,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                {
                        int64_t res;
 
-                       res = (estack_bx_v | estack_ax_v);
+                       res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v);
                        estack_pop(stack, top, ax, bx);
                        estack_ax_v = res;
                        next_pc += sizeof(struct binary_op);
@@ -1040,7 +1026,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                {
                        int64_t res;
 
-                       res = (estack_bx_v ^ estack_ax_v);
+                       res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v);
                        estack_pop(stack, top, ax, bx);
                        estack_ax_v = res;
                        next_pc += sizeof(struct binary_op);
@@ -1059,7 +1045,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 
                OP(FILTER_OP_UNARY_BIT_NOT):
                {
-                       estack_ax_v = ~estack_ax_v;
+                       estack_ax_v = ~(uint64_t) estack_ax_v;
                        next_pc += sizeof(struct unary_op);
                        PO;
                }
@@ -1556,7 +1542,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
                                ret = -EINVAL;
                                goto end;
                        }
-                       estack_ax(stack, top)->u.s.seq_len = SIZE_MAX;
+                       estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
                        estack_ax(stack, top)->u.s.literal_type =
                                ESTACK_STRING_LITERAL_TYPE_NONE;
                        next_pc += sizeof(struct load_op);