/* Definitions for expressions designed to be executed on the agent
- Copyright (C) 1998-2013 Free Software Foundation, Inc.
+ Copyright (C) 1998-2016 Free Software Foundation, Inc.
This file is part of GDB.
/* A buffer containing a agent expression. */
struct agent_expr
{
+ /* Construct an empty agent expression. */
+ explicit agent_expr (struct gdbarch *gdbarch, CORE_ADDR scope);
+
+ ~agent_expr ();
+
/* The bytes of the expression. */
unsigned char *buf;
*/
int reg_mask_len;
unsigned char *reg_mask;
+
+ /* For the data tracing facility, we need to insert `trace' bytecodes
+ before each data fetch; this records all the memory that the
+ expression touches in the course of evaluation, so that memory will
+ be available when the user later tries to evaluate the expression
+ in GDB.
+
+ Setting the flag 'tracing' to non-zero enables the code that
+ emits the trace bytecodes at the appropriate points. */
+
+ unsigned int tracing : 1;
+
+ /* This indicates that pointers to chars should get an added
+ tracenz bytecode to record nonzero bytes, up to a length that
+ is the value of trace_string. */
+
+ int trace_string;
};
+/* An agent_expr owning pointer. */
+typedef gdb::unique_ptr<agent_expr> agent_expr_up;
+
/* Pointer to an agent_expr structure. */
typedef struct agent_expr *agent_expr_p;
/* Functions for building expressions. */
-/* Allocate a new, empty agent expression. */
-extern struct agent_expr *new_agent_expr (struct gdbarch *, CORE_ADDR);
-
-/* Free a agent expression. */
-extern void free_agent_expr (struct agent_expr *);
-extern struct cleanup *make_cleanup_free_agent_expr (struct agent_expr *);
+/* Append a raw byte to EXPR. */
+extern void ax_raw_byte (struct agent_expr *expr, gdb_byte byte);
/* Append a simple operator OP to EXPR. */
extern void ax_simple (struct agent_expr *EXPR, enum agent_op OP);