#include <stdio.h>
#include <helper.h>
#include <lttng/ust-events.h>
+#include <lttng/ust-context-provider.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
REG_S64,
REG_DOUBLE,
REG_STRING,
- REG_TYPE_UNKNOWN,
+ REG_UNKNOWN,
};
/* Validation stack */
/* Execution stack */
struct estack_entry {
+ enum entry_type type; /* For dynamic typing. */
union {
int64_t v;
double d;
struct estack_entry e[FILTER_STACK_LEN];
};
+/*
+ * Always use aliased type for ax/bx (top of stack).
+ * When ax/bx are S64, use aliased value.
+ */
#define estack_ax_v ax
#define estack_bx_v bx
+#define estack_ax_t ax_t
+#define estack_bx_t bx_t
+/*
+ * ax and bx registers can hold either integer, double or string.
+ */
#define estack_ax(stack, top) \
({ \
assert((top) > FILTER_STACK_EMPTY); \
&(stack)->e[(top) - 1]; \
})
-#define estack_push(stack, top, ax, bx) \
+/*
+ * Currently, only integers (REG_S64) can be pushed into the stack.
+ */
+#define estack_push(stack, top, ax, bx, ax_t, bx_t) \
do { \
assert((top) < FILTER_STACK_LEN - 1); \
(stack)->e[(top) - 1].u.v = (bx); \
+ (stack)->e[(top) - 1].type = (bx_t); \
(bx) = (ax); \
+ (bx_t) = (ax_t); \
++(top); \
} while (0)
-#define estack_pop(stack, top, ax, bx) \
+#define estack_pop(stack, top, ax, bx, ax_t, bx_t) \
do { \
assert((top) > FILTER_STACK_EMPTY); \
(ax) = (bx); \
+ (ax_t) = (bx_t); \
(bx) = (stack)->e[(top) - 2].u.v; \
+ (bx_t) = (stack)->e[(top) - 2].type; \
(top)--; \
} while (0)