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2009-12-28 Stan Shebs <stan@codesourcery.com>

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Add trace state variables.
	* ax.h (enum agent_op): Add getv, setv, and tracev.
	(ax_tsv): Declare.
	* ax-gdb.c: Include tracepoint.h.
	(gen_expr): Handle BINOP_ASSIGN, BINOP_ASSIGN_MODIFY, and
	OP_INTERNALVAR.
	(gen_expr_binop_rest): New function, split from gen_expr.
	* ax-general.c (ax_tsv): New function.
	(aop_map): Add new bytecodes.
	* tracepoint.h (struct trace_state_variable): New struct.
	(tsv_s): New typedef.
	(find_trace_state_variable): Declare.
	* tracepoint.c (tvariables): New global.
	(next_tsv_number): New global.
	(create_trace_state_variable): New function.
	(find_trace_state_variable): New function.
	(delete_trace_state_variable): New function.
	(trace_variable_command): New function.
	(delete_trace_variable_command): New function.
	(tvariables_info): New function.
	(trace_start_command): Download tsvs with initial values.
	(_initialize_tracepoint): Add new commands.
	* NEWS: Mention the addition of trace state variables.

==> doc/ChangeLog <==
2009-12-28  Stan Shebs  <stan@codesourcery.com>

	* gdb.texinfo (Trace State Variables): New section.
	(Tracepoint Packets): Describe trace state variable packets.
	* agentexpr.texi (Bytecode Descriptions): Describe trace state
	variable bytecodes.

==> testsuite/ChangeLog <==
2009-12-28  Stan Shebs  <stan@codesourcery.com>

	* gdb.trace/tsv.exp: New file.
	* gdb.base/completion.exp: Update ambiguous info output.
This commit is contained in:
Stan Shebs 2009-12-28 23:39:10 +00:00
parent ae77ee9a7f
commit f61e138d9a
13 changed files with 792 additions and 120 deletions
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30
gdb/tracepoint.h
View file

@ -35,6 +35,34 @@ enum actionline_type
STEPPING = 2
};
/* A trace state variable is a value managed by a target being
traced. A trace state variable (or tsv for short) can be accessed
and assigned to by tracepoint actions and conditionals, but is not
part of the program being traced, and it doesn't have to be
collected. Effectively the variables are scratch space for
tracepoints. */
struct trace_state_variable
{
/* The variable's name. The user has to prefix with a dollar sign,
but we don't store that internally. */
const char *name;
/* An id number assigned by GDB, and transmitted to targets. */
int number;
/* The initial value of a variable is a 64-bit signed integer. */
LONGEST initial_value;
/* 1 if the value is known, else 0. The value is known during a
trace run, or in tfind mode if the variable was collected into
the current trace frame. */
int value_known;
/* The value of a variable is a 64-bit signed integer. */
LONGEST value;
};
extern unsigned long trace_running_p;
/* A hook used to notify the UI of tracepoint operations. */
@ -49,4 +77,6 @@ enum actionline_type validate_actionline (char **, struct breakpoint *);
extern void end_actions_pseudocommand (char *args, int from_tty);
extern void while_stepping_pseudocommand (char *args, int from_tty);
extern struct trace_state_variable *find_trace_state_variable (const char *name);
#endif /* TRACEPOINT_H */