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-rw-r--r--Changelog-Trunk.txt1
-rw-r--r--src/map/script.c136
-rw-r--r--src/map/script.h3
3 files changed, 82 insertions, 58 deletions
diff --git a/Changelog-Trunk.txt b/Changelog-Trunk.txt
index 43f0165b1..42a3c35e8 100644
--- a/Changelog-Trunk.txt
+++ b/Changelog-Trunk.txt
@@ -1,6 +1,7 @@
Date Added
2010/11/27
+ * Fixed a crash uncovered with r14501, caused by outdated local variables when a script is about to suspend or terminate (bugreport:4577). [Ai4rei]
* Fixed a crash when using food status bonuses with cash food status bonuses (bugreport:4582, since r14437). [Ai4rei]
2010/11/26
* Fixed description of bCriticalAddRace having 'race' and 'crit' parameters interchanged (bugreport:4383, since r1116 and r1382, related r12804). [Ai4rei]
diff --git a/src/map/script.c b/src/map/script.c
index 06ede175d..589129b2e 100644
--- a/src/map/script.c
+++ b/src/map/script.c
@@ -2694,6 +2694,10 @@ struct script_state* script_alloc_state(struct script_code* script, int pos, int
/// @param st Script state
void script_free_state(struct script_state* st)
{
+ if(st->bk_st)
+ {// backup was not restored
+ ShowDebug("script_free_state: Previous script state lost (rid=%d, oid=%d, state=%d, bk_npcid=%d).\n", st->bk_st->rid, st->bk_st->oid, st->bk_st->state, st->bk_npcid);
+ }
if( st->sleep.timer != INVALID_TIMER )
delete_timer(st->sleep.timer, run_script_timer);
script_free_vars(st->stack->var_function);
@@ -3138,6 +3142,63 @@ int run_script_timer(int tid, unsigned int tick, int id, intptr data)
return 0;
}
+/// Detaches script state from possibly attached character and restores it's previous script if any.
+///
+/// @param st Script state to detach.
+/// @param dequeue_event Whether to schedule any queued events, when there was no previous script.
+static void script_detach_state(struct script_state* st, bool dequeue_event)
+{
+ struct map_session_data* sd;
+
+ if(st->rid && (sd = map_id2sd(st->rid))!=NULL)
+ {
+ sd->st = st->bk_st;
+ sd->npc_id = st->bk_npcid;
+
+ if(st->bk_st)
+ {
+ //Remove tag for removal.
+ st->bk_st = NULL;
+ st->bk_npcid = 0;
+ }
+ else if(dequeue_event)
+ {
+ npc_event_dequeue(sd);
+ }
+ }
+ else if(st->bk_st)
+ {// rid was set to 0, before detaching the script state
+ ShowError("script_detach_state: Found previous script state without attached player (rid=%d, oid=%d, state=%d, bk_npcid=%d)\n", st->bk_st->rid, st->bk_st->oid, st->bk_st->state, st->bk_npcid);
+ script_reportsrc(st->bk_st);
+
+ script_free_state(st->bk_st);
+ st->bk_st = NULL;
+ }
+}
+
+/// Attaches script state to possibly attached character and backups it's previous script, if any.
+///
+/// @param st Script state to attach.
+static void script_attach_state(struct script_state* st)
+{
+ struct map_session_data* sd;
+
+ if(st->rid && (sd = map_id2sd(st->rid))!=NULL)
+ {
+ if(st!=sd->st)
+ {
+ if(st->bk_st)
+ {// there is already a backup
+ ShowDebug("script_free_state: Previous script state lost (rid=%d, oid=%d, state=%d, bk_npcid=%d).\n", st->bk_st->rid, st->bk_st->oid, st->bk_st->state, st->bk_npcid);
+ }
+ st->bk_st = sd->st;
+ st->bk_npcid = sd->npc_id;
+ }
+ sd->st = st;
+ sd->npc_id = st->oid;
+ }
+}
+
/*==========================================
* スクリプトの実行メイン部分
*------------------------------------------*/
@@ -3146,22 +3207,10 @@ void run_script_main(struct script_state *st)
int cmdcount=script_config.check_cmdcount;
int gotocount=script_config.check_gotocount;
TBL_PC *sd;
- //For backing up purposes
- struct script_state *bk_st = NULL;
- int bk_npcid = 0;
struct script_stack *stack=st->stack;
struct npc_data *nd;
- sd = map_id2sd(st->rid);
-
- if(sd){
- if(sd->st != st){
- bk_st = sd->st;
- bk_npcid = sd->npc_id;
- }
- sd->st = st;
- sd->npc_id = st->oid;
- }
+ script_attach_state(st);
nd = map_id2nd(st->oid);
if( nd && map[nd->bl.m].instance_id > 0 )
@@ -3260,43 +3309,37 @@ void run_script_main(struct script_state *st)
if(st->sleep.tick > 0) {
//Restore previous script
- if (sd) {
- sd->st = bk_st;
- sd->npc_id = bk_npcid;
- bk_st = NULL; //Remove tag for removal.
- }
+ script_detach_state(st, false);
//Delay execution
- sd = map_id2sd(st->rid); // Refresh sd since script might have attached someone while running. [Inkfish]
+ sd = map_id2sd(st->rid); // Get sd since script might have attached someone while running. [Inkfish]
st->sleep.charid = sd?sd->status.char_id:0;
st->sleep.timer = add_timer(gettick()+st->sleep.tick,
run_script_timer, st->sleep.charid, (intptr)st);
linkdb_insert(&sleep_db, (void*)st->oid, st);
}
- else if(st->state != END && sd){
+ else if(st->state != END && st->rid){
//Resume later (st is already attached to player).
- if(bk_st) {
+ if(st->bk_st) {
ShowWarning("Unable to restore stack! Double continuation!\n");
//Report BOTH scripts to see if that can help somehow.
ShowDebug("Previous script (lost):\n");
- script_reportsrc(bk_st);
+ script_reportsrc(st->bk_st);
ShowDebug("Current script:\n");
script_reportsrc(st);
+
+ script_free_state(st->bk_st);
+ st->bk_st = NULL;
}
} else {
//Dispose of script.
- if (sd)
+ if ((sd = map_id2sd(st->rid))!=NULL)
{ //Restore previous stack and save char.
if(sd->state.using_fake_npc){
clif_clearunit_single(sd->npc_id, 0, sd->fd);
sd->state.using_fake_npc = 0;
}
//Restore previous script if any.
- sd->st = bk_st;
- sd->npc_id = bk_npcid;
- if (!bk_st)
- npc_event_dequeue(sd);
- else
- bk_st = NULL; //Remove tag for removal.
+ script_detach_state(st, true);
if (sd->state.reg_dirty&2)
intif_saveregistry(sd,2);
if (sd->state.reg_dirty&1)
@@ -3305,13 +3348,6 @@ void run_script_main(struct script_state *st)
script_free_state(st);
st = NULL;
}
-
- if (bk_st)
- { //Remove previous script
- script_free_state(bk_st);
- bk_st = NULL;
- }
-
}
int script_config_read(char *cfgName)
@@ -9087,23 +9123,14 @@ BUILDIN_FUNC(warpwaitingpc)
// ...
//
+/// Detaches a character from a script.
+///
+/// @param st Script state to detach the character from.
static void script_detach_rid(struct script_state* st)
{
- struct map_session_data* sd;
-
if(st->rid)
{
- if((sd = script_rid2sd(st))!=NULL)
- {
- if(sd->npc_id!=st->oid)
- {
- ShowDebug("script_detach_rid: sd->npc_id (%d) != st->oid (%d), please report this!\n", sd->npc_id, st->oid);
- script_reportsrc(st);
- }
-
- sd->npc_id = 0;
- sd->st = NULL;
- }
+ script_detach_state(st, false);
st->rid = 0;
}
}
@@ -9119,9 +9146,8 @@ BUILDIN_FUNC(attachrid)
if ((sd = map_id2sd(rid))!=NULL) {
script_detach_rid(st);
- sd->st = st;
- sd->npc_id = st->oid;
st->rid = rid;
+ script_attach_state(st);
script_pushint(st,1);
} else
script_pushint(st,0);
@@ -13238,17 +13264,11 @@ BUILDIN_FUNC(unitskillusepos)
BUILDIN_FUNC(sleep)
{
int ticks;
- TBL_PC* sd;
ticks = script_getnum(st,2);
- sd = map_id2sd(st->rid);
// detach the player
- if( sd && sd->npc_id == st->oid )
- {
- sd->npc_id = 0;
- }
- st->rid = 0;
+ script_detach_rid(st);
if( ticks <= 0 )
{// do nothing
diff --git a/src/map/script.h b/src/map/script.h
index aa6b85140..8e9acabaf 100644
--- a/src/map/script.h
+++ b/src/map/script.h
@@ -121,6 +121,9 @@ struct script_state {
int tick,timer,charid;
} sleep;
int instance_id;
+ //For backing up purposes
+ struct script_state *bk_st;
+ int bk_npcid;
};
struct script_reg {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 19:47:43 +0000