Python: Move and rename gdb.BtraceFunction

[deliverable/binutils-gdb.git] / gdb / ax.h

diff --git a/gdb/ax.h b/gdb/ax.h
index a12457501018020da26751af0feb51fbe673e995..621ba176bd29ab7c16aa992c5a48bfac3b567ebd 100644 (file)
--- a/gdb/ax.h
+++ b/gdb/ax.h
@@ -1,6 +1,5 @@
 /* Definitions for expressions designed to be executed on the agent
-   Copyright (C) 1998, 1999, 2000, 2007, 2008, 2009, 2010, 2011
-   Free Software Foundation, Inc.
+   Copyright (C) 1998-2017 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -21,6 +20,7 @@
 #define AGENTEXPR_H
 
 #include "doublest.h"          /* For DOUBLEST.  */
+#include "vec.h"
 
 /* It's sometimes useful to be able to debug programs that you can't
    really stop for more than a fraction of a second.  To this end, the
@@ -94,6 +94,11 @@ union agent_val
 /* 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;
 
@@ -143,8 +148,28 @@ struct agent_expr
     */
     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 std::unique_ptr<agent_expr> agent_expr_up;
+
 /* The actual values of the various bytecode operations.  */
 
 enum agent_op
@@ -160,12 +185,8 @@ enum agent_op
 
 /* 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);
@@ -213,6 +234,9 @@ extern void ax_reg_mask (struct agent_expr *ax, int reg);
 
 /* Assemble code to operate on a trace state variable.  */
 extern void ax_tsv (struct agent_expr *expr, enum agent_op op, int num);
+
+/* Append a string to the bytecode stream.  */
+extern void ax_string (struct agent_expr *x, const char *str, int slen);
 \f
 
 /* Functions for printing out expressions, and otherwise debugging