breakpoints: add rwp all command

This patch adds the "all" option to the rwp command.
It removes all watchpoints, much like rbp all removes
all breakpoints.

Change-Id: Id58dd103085e558f17afa4a287888cf085566ca9
Signed-off-by: Marek Vrbka <marek.vrbka@codasip.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7907
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

doc/openocd.texi

@@ -9358,8 +9358,8 @@ for similar mechanisms that do not consume hardware breakpoints.)
 Remove the breakpoint at @var{address} or all breakpoints.
 @end deffn
 
-@deffn {Command} {rwp} address
+@deffn {Command} {rwp} @option{all} | address
-Remove data watchpoint on @var{address}
+Remove data watchpoint on @var{address} or all watchpoints.
 @end deffn
 
 @deffn {Command} {wp} [address len [(@option{r}|@option{w}|@option{a}) [value [mask]]]]

src/target/breakpoints.c

@@ -17,6 +17,11 @@
 #include "breakpoints.h"
 #include "smp.h"
 
+enum breakpoint_watchpoint {
+	BREAKPOINT,
+	WATCHPOINT,
+};
+
 static const char * const breakpoint_type_strings[] = {
 	"hardware",
 	"software"
@@ -375,26 +380,90 @@ int breakpoint_remove(struct target *target, target_addr_t address)
 	return retval;
 }
 
-int breakpoint_remove_all(struct target *target)
+static int watchpoint_free(struct target *target, struct watchpoint *watchpoint_to_remove)
 {
+	struct watchpoint *watchpoint = target->watchpoints;
+	struct watchpoint **watchpoint_p = &target->watchpoints;
+	int retval;
+
+	while (watchpoint) {
+		if (watchpoint == watchpoint_to_remove)
+			break;
+		watchpoint_p = &watchpoint->next;
+		watchpoint = watchpoint->next;
+	}
+
+	if (!watchpoint)
+		return ERROR_OK;
+	retval = target_remove_watchpoint(target, watchpoint);
+	if (retval != ERROR_OK) {
+		LOG_TARGET_ERROR(target, "could not remove watchpoint #%d on this target",
+						 watchpoint->number);
+		return retval;
+	}
+
+	LOG_DEBUG("free WPID: %d --> %d", watchpoint->unique_id, retval);
+	(*watchpoint_p) = watchpoint->next;
+	free(watchpoint);
+
+	return ERROR_OK;
+}
+
+static int watchpoint_remove_all_internal(struct target *target)
+{
+	struct watchpoint *watchpoint = target->watchpoints;
+	int retval = ERROR_OK;
+
+	while (watchpoint) {
+		struct watchpoint *tmp = watchpoint;
+		watchpoint = watchpoint->next;
+		int status = watchpoint_free(target, tmp);
+		if (status != ERROR_OK)
+			retval = status;
+	}
+
+	return retval;
+}
+
+int breakpoint_watchpoint_remove_all(struct target *target, enum breakpoint_watchpoint bp_wp)
+{
+	assert(bp_wp == BREAKPOINT || bp_wp == WATCHPOINT);
 	int retval = ERROR_OK;
 	if (target->smp) {
 		struct target_list *head;
 
 		foreach_smp_target(head, target->smp_targets) {
 			struct target *curr = head->target;
-			int status = breakpoint_remove_all_internal(curr);
+
+			int status = ERROR_OK;
+			if (bp_wp == BREAKPOINT)
+				status = breakpoint_remove_all_internal(curr);
+			else
+				status = watchpoint_remove_all_internal(curr);
 
 			if (status != ERROR_OK)
 				retval = status;
 		}
 	} else {
-		retval = breakpoint_remove_all_internal(target);
+		if (bp_wp == BREAKPOINT)
+			retval = breakpoint_remove_all_internal(target);
+		else
+			retval = watchpoint_remove_all_internal(target);
 	}
 
 	return retval;
 }
 
+int breakpoint_remove_all(struct target *target)
+{
+	return breakpoint_watchpoint_remove_all(target, BREAKPOINT);
+}
+
+int watchpoint_remove_all(struct target *target)
+{
+	return breakpoint_watchpoint_remove_all(target, WATCHPOINT);
+}
+
 static int breakpoint_clear_target_internal(struct target *target)
 {
 	LOG_DEBUG("Delete all breakpoints for target: %s",
@@ -532,35 +601,6 @@ int watchpoint_add(struct target *target, target_addr_t address,
 	}
 }
 
-static int watchpoint_free(struct target *target, struct watchpoint *watchpoint_to_remove)
-{
-	struct watchpoint *watchpoint = target->watchpoints;
-	struct watchpoint **watchpoint_p = &target->watchpoints;
-	int retval;
-
-	while (watchpoint) {
-		if (watchpoint == watchpoint_to_remove)
-			break;
-		watchpoint_p = &watchpoint->next;
-		watchpoint = watchpoint->next;
-	}
-
-	if (!watchpoint)
-		return ERROR_OK;
-	retval = target_remove_watchpoint(target, watchpoint);
-	if (retval != ERROR_OK) {
-		LOG_TARGET_ERROR(target, "could not remove watchpoint #%d on this target",
-						watchpoint->number);
-		return retval;
-	}
-
-	LOG_DEBUG("free WPID: %d --> %d", watchpoint->unique_id, retval);
-	(*watchpoint_p) = watchpoint->next;
-	free(watchpoint);
-
-	return ERROR_OK;
-}
-
 static int watchpoint_remove_internal(struct target *target, target_addr_t address)
 {
 	struct watchpoint *watchpoint = target->watchpoints;

src/target/breakpoints.h

@@ -73,6 +73,7 @@ int watchpoint_add(struct target *target,
 		target_addr_t address, uint32_t length,
 		enum watchpoint_rw rw, uint64_t value, uint64_t mask);
 int watchpoint_remove(struct target *target, target_addr_t address);
+int watchpoint_remove_all(struct target *target);
 
 /* report type and address of just hit watchpoint */
 int watchpoint_hit(struct target *target, enum watchpoint_rw *rw,

src/target/target.c

@@ -4136,17 +4136,28 @@ COMMAND_HANDLER(handle_wp_command)
 
 COMMAND_HANDLER(handle_rwp_command)
 {
+	int retval;
+
 	if (CMD_ARGC != 1)
 		return ERROR_COMMAND_SYNTAX_ERROR;
 
-	target_addr_t addr;
-	COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
-
 	struct target *target = get_current_target(CMD_CTX);
-	int retval = watchpoint_remove(target, addr);
+	if (!strcmp(CMD_ARGV[0], "all")) {
+		retval = watchpoint_remove_all(target);
 
-	if (retval != ERROR_OK)
+		if (retval != ERROR_OK) {
-		command_print(CMD, "Error during removal of watchpoint at address " TARGET_ADDR_FMT, addr);
+			command_print(CMD, "Error encountered during removal of all watchpoints.");
+			command_print(CMD, "Some watchpoints may have remained set.");
+		}
+	} else {
+		target_addr_t addr;
+		COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
+
+		retval = watchpoint_remove(target, addr);
+
+		if (retval != ERROR_OK)
+			command_print(CMD, "Error during removal of watchpoint at address " TARGET_ADDR_FMT, addr);
+	}
 
 	return retval;
 }
@@ -7065,7 +7076,7 @@ static const struct command_registration target_exec_command_handlers[] = {
 		.handler = handle_rwp_command,
 		.mode = COMMAND_EXEC,
 		.help = "remove watchpoint",
-		.usage = "address",
+		.usage = "'all' | address",
 	},
 	{
 		.name = "load_image",