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/*******************************************************************************
* Copyright (c) 2007, 2015 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
/*
* This module implements Breakpoints service.
* The service maintains a list of breakpoints.
* Each breakpoint consists of one or more conditions that determine
* when a program's execution should be interrupted.
*/
#ifndef D_breakpoints
#define D_breakpoints
#include <tcf/framework/context.h>
#include <tcf/framework/protocol.h>
typedef struct BreakpointInfo BreakpointInfo;
typedef struct BreakpointAttribute BreakpointAttribute;
struct BreakpointAttribute {
BreakpointAttribute * next;
char * name; /* Attribute name */
char * value; /* Attribute value as JSON string */
};
#if SERVICE_Breakpoints
/*
* Breakpoint attribute names.
* Clients may define additional attributes.
*/
#define BREAKPOINT_ID "ID"
#define BREAKPOINT_ENABLED "Enabled"
#define BREAKPOINT_TYPE "BreakpointType"
#define BREAKPOINT_CONTEXTNAMES "ContextNames"
#define BREAKPOINT_CONTEXTIDS "ContextIds"
#define BREAKPOINT_EXECUTABLEPATHS "ExecPaths"
#define BREAKPOINT_LOCATION "Location"
#define BREAKPOINT_SIZE "Size"
#define BREAKPOINT_ACCESSMODE "AccessMode"
#define BREAKPOINT_FILE "File"
#define BREAKPOINT_LINE "Line"
#define BREAKPOINT_COLUMN "Column"
#define BREAKPOINT_PATTERN "MaskValue"
#define BREAKPOINT_MASK "Mask"
#define BREAKPOINT_STOP_GROUP "StopGroup"
#define BREAKPOINT_IGNORECOUNT "IgnoreCount"
#define BREAKPOINT_TIME "Time"
#define BREAKPOINT_SCALE "TimeScale"
#define BREAKPOINT_UNITS "TimeUnits"
#define BREAKPOINT_CONDITION "Condition"
#define BREAKPOINT_TEMPORARY "Temporary"
#define BREAKPOINT_EVENT_TYPE "EventType"
#define BREAKPOINT_EVENT_ARGS "EventArgs"
#define BREAKPOINT_CLIENT_DATA "ClientData"
#define BREAKPOINT_CONTEXT_QUERY "ContextQuery"
#define BREAKPOINT_SERVICE "Service"
#define BREAKPOINT_SKIP_PROLOGUE "SkipPrologue"
#define BREAKPOINT_LINE_OFFSET "LineOffset"
/* Breakpoints event listener */
typedef struct BreakpointsEventListener {
void (*breakpoint_created)(BreakpointInfo *, void *);
void (*breakpoint_changed)(BreakpointInfo *, void *);
void (*breakpoint_deleted)(BreakpointInfo *, void *);
void (*breakpoint_status_changed)(BreakpointInfo *, void *);
} BreakpointsEventListener;
/*
* Add a listener for Breakpoints service events.
*/
extern void add_breakpoint_event_listener(BreakpointsEventListener * listener, void * args);
/*
* Remove a listener of Breakpoints service events.
*/
extern void rem_breakpoint_event_listener(BreakpointsEventListener * listener);
/*
* Iterate all breakpoints known to the Breakpoints service,
* including breakpoints that are created by other (remote) clients.
*/
typedef void IterateBreakpointsCallBack(BreakpointInfo *, void *);
extern void iterate_breakpoints(IterateBreakpointsCallBack * callback, void * args);
/*
* Get breakpoint attributes.
*/
extern BreakpointAttribute * get_breakpoint_attributes(BreakpointInfo * bp);
/*
* Create new breakpoint with given attributes.
* Attributes must include, at least, BREAKPOINT_ID.
* If a breakpoint with such ID already exists, it will be modified to match
* new attributes instead of creating a new one.
* Caller should allocate attributes using myalloc.h functions.
* Breakpoints service will free attributes memory using loc_free().
*/
extern BreakpointInfo * create_breakpoint(BreakpointAttribute * attrs);
/*
* Change breakpoint attributes to given attributes.
* Caller should allocate attributes using myalloc.h functions.
* Breakpoints service will free attributes memory using loc_free().
* The function compares existing attributes with new ones,
* and calls listeners only if attributes are different.
*/
extern void change_breakpoint_attributes(BreakpointInfo * bp, BreakpointAttribute * attrs);
/*
* Return breakpoint status information as a JSON string.
* Clients should dispose the string using loc_free().
*/
extern char * get_breakpoint_status(BreakpointInfo * bp);
/*
* Delete a breakpoint.
* If other (remote) client also created a breakpoint with same ID,
* the breakpoint will be deleted when both clients have requested it to be deleted.
*/
extern void delete_breakpoint(BreakpointInfo * bp);
/*
* Iterate all breakpoints that are linked to context breakpoint 'cb' in the breakpoint address space
* associated with executable context 'ctx'. Breakpoint address space is the context returned by
* context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT).
* Single 'cb' can be linked to multiple breakpoints if those breakpoint locations are evaluated
* to same address in same address space. Single breakpoint can be linked to multiple CBs if the
* breakpoint scope spawns multiple address spaces.
*/
typedef void IterateCBLinksCallBack(BreakpointInfo *, void *);
extern void iterate_context_breakpoint_links(Context * ctx, ContextBreakpoint * cb, IterateCBLinksCallBack * callback, void * args);
/*
* The function is called by Run Control service every time a context is stopped by a breakpoint.
* The function evaluates breakpoint condition and calls suspend_debug_context() if the condition is true.
*/
extern void evaluate_breakpoint(Context * ctx);
/*
* When a context is stopped by breakpoint, it is necessary to disable
* the breakpoint temporarily before the context can be resumed.
* This function function removes break instruction, then does single step
* over breakpoint location, then restores break instruction.
* Return 0 if it is OK to resume context from current state,
* return 1 if context needs to step over a breakpoint.
*/
extern int skip_breakpoint(Context * ctx, int single_step);
/*
* Return 1 if the context is stepping over a software breakpoint,
* Return 0 otherwise.
*/
extern int is_skipping_breakpoint(Context * ctx);
/* Return 1 if break instruction is planted at given address in the context memory */
extern int is_breakpoint_address(Context * ctx, ContextAddress address);
/* Clone all planted breakpoints when a process forks */
extern void clone_breakpoints_on_process_fork(Context * parent, Context * child);
/*
* Unplant all breakpoints in a process (e.g. before detaching).
* Return -1 and set errno if cannot remove some of the breakpoints.
* Return 0 on success.
*/
extern int unplant_breakpoints(Context * ctx);
/*
* Check if memory data buffer contains planted break instructions and remove them.
* Return -1 and set errno if the check cannot be done.
*/
extern int check_breakpoints_on_memory_read(Context * ctx, ContextAddress address, void * buf, size_t size);
/*
* Check if data is about to be written over planted break instructions and adjust the data and breakpoint backing storage
* Return -1 and set errno if the check cannot be done.
* Return 0 on success.
*/
extern int check_breakpoints_on_memory_write(Context * ctx, ContextAddress address, void * buf, size_t size);
/* Evenpoint callback. It is called when context is suspended by eventpoint, right before "context_stopped" event */
typedef void EventPointCallBack(Context *, void *);
/* Create, plant and return eventpoint. Eventpoints are breakpoints that are created by agent to control execution of debugee.
* Eventpoint are not exposed through "Breakpoints" TCF service, they are handled by the agent itself.
* 'attrs' are disposed by the Breakpoints service using loc_free().
* create_eventpoint_ext() throws exception if 'attrs' format is invalid. */
extern BreakpointInfo * create_eventpoint(const char * location, Context * ctx, EventPointCallBack * callback, void * callback_args);
extern BreakpointInfo * create_eventpoint_ext(BreakpointAttribute * attrs, Context * ctx, EventPointCallBack * callback, void * callback_args);
/* Unplant and destroy eventpoint */
extern void destroy_eventpoint(BreakpointInfo * eventpoint);
extern void ini_breakpoints_service(Protocol *, TCFBroadcastGroup *);
#else /* SERVICE_Breakpoints */
#define skip_breakpoint(ctx, single_step) 0
#define is_breakpoint_address(ctx, address) 0
#define clone_breakpoints_on_process_fork(parent, child) 0
#define unplant_breakpoints(ctx) 0
#define check_breakpoints_on_memory_read(ctx, address, buf, size) 0
#define check_breakpoints_on_memory_write(ctx, address, buf, size) 0
#define create_eventpoint(location, ctx, callback, callback_args) 0
#endif /* SERVICE_Breakpoints */
#endif /* D_breakpoints */
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