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-rw-r--r--engines/sci/engine/kmovement.cpp7
-rw-r--r--engines/sci/engine/kscripts.cpp13
-rw-r--r--engines/sci/engine/memobj.cpp27
-rw-r--r--engines/sci/engine/seg_manager.cpp142
-rw-r--r--engines/sci/engine/seg_manager.h23
5 files changed, 85 insertions, 127 deletions
diff --git a/engines/sci/engine/kmovement.cpp b/engines/sci/engine/kmovement.cpp
index 19de6a99cb..cb1f841ece 100644
--- a/engines/sci/engine/kmovement.cpp
+++ b/engines/sci/engine/kmovement.cpp
@@ -391,7 +391,6 @@ reg_t kDoBresen(EngineState *s, int, int argc, reg_t *argv) {
}
extern void _k_dirloop(reg_t obj, uint16 angle, EngineState *s, int argc, reg_t *argv);
-int is_heap_object(EngineState *s, reg_t pos);
extern int get_angle(int xrel, int yrel);
reg_t kDoAvoider(EngineState *s, int, int argc, reg_t *argv) {
@@ -404,14 +403,14 @@ reg_t kDoAvoider(EngineState *s, int, int argc, reg_t *argv) {
s->r_acc = make_reg(0, -1);
- if (!is_heap_object(s, avoider)) {
+ if (!s->segMan->isHeapObject(avoider)) {
warning("DoAvoider() where avoider %04x:%04x is not an object", PRINT_REG(avoider));
return NULL_REG;
}
client = GET_SEL32(avoider, client);
- if (!is_heap_object(s, client)) {
+ if (!s->segMan->isHeapObject(client)) {
warning("DoAvoider() where client %04x:%04x is not an object", PRINT_REG(client));
return NULL_REG;
}
@@ -419,7 +418,7 @@ reg_t kDoAvoider(EngineState *s, int, int argc, reg_t *argv) {
looper = GET_SEL32(client, looper);
mover = GET_SEL32(client, mover);
- if (!is_heap_object(s, mover)) {
+ if (!s->segMan->isHeapObject(mover)) {
if (mover.segment) {
warning("DoAvoider() where mover %04x:%04x is not an object", PRINT_REG(mover));
}
diff --git a/engines/sci/engine/kscripts.cpp b/engines/sci/engine/kscripts.cpp
index 5aabd86732..318d4b9c4d 100644
--- a/engines/sci/engine/kscripts.cpp
+++ b/engines/sci/engine/kscripts.cpp
@@ -318,27 +318,18 @@ reg_t kDisposeScript(EngineState *s, int, int argc, reg_t *argv) {
}
}
-bool is_heap_object(EngineState *s, reg_t pos) {
- Object *obj = s->segMan->getObject(pos);
- if (obj == NULL)
- return false;
- if (obj->flags & OBJECT_FLAG_FREED)
- return false;
- return !s->segMan->scriptIsMarkedAsDeleted(pos.segment);
-}
-
reg_t kIsObject(EngineState *s, int, int argc, reg_t *argv) {
if (argv[0].offset == 0xffff) // Treated specially
return NULL_REG;
else
- return make_reg(0, is_heap_object(s, argv[0]));
+ return make_reg(0, s->segMan->isHeapObject(argv[0]));
}
reg_t kRespondsTo(EngineState *s, int, int argc, reg_t *argv) {
reg_t obj = argv[0];
int selector = argv[1].toUint16();
- return make_reg(0, is_heap_object(s, obj) && lookup_selector(s->segMan, obj, selector, NULL, NULL) != kSelectorNone);
+ return make_reg(0, s->segMan->isHeapObject(obj) && lookup_selector(s->segMan, obj, selector, NULL, NULL) != kSelectorNone);
}
} // End of namespace Sci
diff --git a/engines/sci/engine/memobj.cpp b/engines/sci/engine/memobj.cpp
index 4697e0a706..c8be76576b 100644
--- a/engines/sci/engine/memobj.cpp
+++ b/engines/sci/engine/memobj.cpp
@@ -34,6 +34,10 @@
namespace Sci {
+//#define GC_DEBUG // Debug garbage collection
+//#define GC_DEBUG_VERBOSE // Debug garbage verbosely
+
+
MemObject *MemObject::createMemObject(MemObjectType type) {
MemObject *mem = 0;
switch (type) {
@@ -115,6 +119,8 @@ void Script::freeScript() {
}
bool Script::init(int script_nr, ResourceManager *resMan) {
+ _sciVersion = resMan->sciVersion();
+
setScriptSize(script_nr, resMan);
_buf = (byte *)malloc(_bufSize);
@@ -141,7 +147,6 @@ bool Script::init(int script_nr, ResourceManager *resMan) {
_nr = script_nr;
- _sciVersion = resMan->sciVersion();
if (_sciVersion >= SCI_VERSION_1_1)
_heapStart = _buf + _scriptSize;
else
@@ -322,14 +327,12 @@ void Script::listAllDeallocatable(SegmentId segId, void *param, NoteCallback not
}
void Script::listAllOutgoingReferences(reg_t addr, void *param, NoteCallback note, SciVersion version) {
- Script *script = this;
-
- if (addr.offset <= script->_bufSize && addr.offset >= -SCRIPT_OBJECT_MAGIC_OFFSET && RAW_IS_OBJECT(script->_buf + addr.offset)) {
+ if (addr.offset <= _bufSize && addr.offset >= -SCRIPT_OBJECT_MAGIC_OFFSET && RAW_IS_OBJECT(_buf + addr.offset)) {
Object *obj = getObject(addr.offset);
if (obj) {
// Note all local variables, if we have a local variable environment
- if (script->_localsSegment)
- (*note)(param, make_reg(script->_localsSegment, 0));
+ if (_localsSegment)
+ (*note)(param, make_reg(_localsSegment, 0));
for (uint i = 0; i < obj->_variables.size(); i++)
(*note)(param, obj->_variables[i]);
@@ -346,16 +349,15 @@ void Script::listAllOutgoingReferences(reg_t addr, void *param, NoteCallback not
//-------------------- clones --------------------
void CloneTable::listAllOutgoingReferences(reg_t addr, void *param, NoteCallback note, SciVersion version) {
- CloneTable *clone_table = this;
Clone *clone;
// assert(addr.segment == _segId);
- if (!clone_table->isValidEntry(addr.offset)) {
+ if (!isValidEntry(addr.offset)) {
error("Unexpected request for outgoing references from clone at %04x:%04x", PRINT_REG(addr));
}
- clone = &(clone_table->_table[addr.offset]);
+ clone = &(_table[addr.offset]);
// Emit all member variables (including references to the 'super' delegate)
for (uint i = 0; i < clone->_variables.size(); i++)
@@ -367,14 +369,13 @@ void CloneTable::listAllOutgoingReferences(reg_t addr, void *param, NoteCallback
}
void CloneTable::freeAtAddress(SegManager *segMan, reg_t addr) {
- CloneTable *clone_table = this;
+#ifdef GC_DEBUG
Object *victim_obj;
// assert(addr.segment == _segId);
- victim_obj = &(clone_table->_table[addr.offset]);
+ victim_obj = &(_table[addr.offset]);
-#ifdef GC_DEBUG
if (!(victim_obj->flags & OBJECT_FLAG_FREED))
warning("[GC] Clone %04x:%04x not reachable and not freed (freeing now)", PRINT_REG(addr));
#ifdef GC_DEBUG_VERBOSE
@@ -386,7 +387,7 @@ void CloneTable::freeAtAddress(SegManager *segMan, reg_t addr) {
warning("[GC] Clone %04x:%04x: Freeing", PRINT_REG(addr));
warning("[GC] Clone had pos %04x:%04x", PRINT_REG(victim_obj->pos));
*/
- clone_table->freeEntry(addr.offset);
+ freeEntry(addr.offset);
}
diff --git a/engines/sci/engine/seg_manager.cpp b/engines/sci/engine/seg_manager.cpp
index e2c56852fa..ed95e22e78 100644
--- a/engines/sci/engine/seg_manager.cpp
+++ b/engines/sci/engine/seg_manager.cpp
@@ -45,9 +45,6 @@ namespace Sci {
#define DEFAULT_OBJECTS 8 // default # of objects per script
#define DEFAULT_OBJECTS_INCREMENT 4 // Number of additional objects to instantiate if we're running out of them
-//#define GC_DEBUG // Debug garbage collection
-//#define GC_DEBUG_VERBOSE // Debug garbage verbosely
-
#undef DEBUG_segMan // Define to turn on debugging
SegManager::SegManager(ResourceManager *resMan) {
@@ -133,34 +130,33 @@ Script *SegManager::allocateScript(int script_nr, SegmentId *seg_id) {
return (Script *)mem;
}
-void Script::setScriptSize(int script_nr, ResourceManager *_resMan) {
- Script &scr = *this; // FIXME: Hack
- Resource *script = _resMan->findResource(ResourceId(kResourceTypeScript, script_nr), 0);
- Resource *heap = _resMan->findResource(ResourceId(kResourceTypeHeap, script_nr), 0);
- bool oldScriptHeader = (_resMan->sciVersion() == SCI_VERSION_0_EARLY);
+void Script::setScriptSize(int script_nr, ResourceManager *resMan) {
+ Resource *script = resMan->findResource(ResourceId(kResourceTypeScript, script_nr), 0);
+ Resource *heap = resMan->findResource(ResourceId(kResourceTypeHeap, script_nr), 0);
+ bool oldScriptHeader = (_sciVersion == SCI_VERSION_0_EARLY);
- scr._scriptSize = script->size;
- scr._heapSize = 0; // Set later
+ _scriptSize = script->size;
+ _heapSize = 0; // Set later
- if (!script || (_resMan->sciVersion() >= SCI_VERSION_1_1 && !heap)) {
+ if (!script || (_sciVersion >= SCI_VERSION_1_1 && !heap)) {
error("SegManager::setScriptSize: failed to load %s", !script ? "script" : "heap");
}
if (oldScriptHeader) {
- scr._bufSize = script->size + READ_LE_UINT16(script->data) * 2;
+ _bufSize = script->size + READ_LE_UINT16(script->data) * 2;
//locals_size = READ_LE_UINT16(script->data) * 2;
- } else if (_resMan->sciVersion() < SCI_VERSION_1_1) {
- scr._bufSize = script->size;
+ } else if (_sciVersion < SCI_VERSION_1_1) {
+ _bufSize = script->size;
} else {
- scr._bufSize = script->size + heap->size;
- scr._heapSize = heap->size;
+ _bufSize = script->size + heap->size;
+ _heapSize = heap->size;
// Ensure that the start of the heap resource can be word-aligned.
if (script->size & 2) {
- scr._bufSize++;
- scr._scriptSize++;
+ _bufSize++;
+ _scriptSize++;
}
- if (scr._bufSize > 65535) {
+ if (_bufSize > 65535) {
error("Script and heap sizes combined exceed 64K."
"This means a fundamental design bug was made in SCI\n"
"regarding SCI1.1 games.\nPlease report this so it can be"
@@ -189,20 +185,19 @@ int SegManager::deallocate(SegmentId seg, bool recursive) {
return 1;
}
-bool SegManager::scriptIsMarkedAsDeleted(SegmentId seg) {
- Script *scr = getScriptIfLoaded(seg);
- if (!scr)
+bool SegManager::isHeapObject(reg_t pos) {
+ Object *obj = getObject(pos);
+ if (obj == NULL)
return false;
- return scr->_markedAsDeleted;
+ if (obj->flags & OBJECT_FLAG_FREED)
+ return false;
+ Script *scr = getScriptIfLoaded(pos.segment);
+ return !(scr && scr->_markedAsDeleted);
}
-
-int SegManager::deallocateScript(int script_nr) {
+void SegManager::deallocateScript(int script_nr) {
SegmentId seg = getScriptSegment(script_nr);
-
deallocate(seg, true);
-
- return 1;
}
Script *SegManager::getScript(const SegmentId seg) {
@@ -297,10 +292,6 @@ bool SegManager::check(SegmentId seg) {
return true;
}
-bool SegManager::scriptIsLoaded(SegmentId seg) {
- return getScriptIfLoaded(seg) != 0;
-}
-
void SegManager::setExportAreWide(bool flag) {
_exportsAreWide = flag;
}
@@ -346,15 +337,13 @@ void Script::scriptAddCodeBlock(reg_t location) {
}
void Script::scriptRelocate(reg_t block) {
- Script *scr = this; // FIXME: Hack
-
- VERIFY(block.offset < (uint16)scr->_bufSize && READ_LE_UINT16(scr->_buf + block.offset) * 2 + block.offset < (uint16)scr->_bufSize,
+ VERIFY(block.offset < (uint16)_bufSize && READ_LE_UINT16(_buf + block.offset) * 2 + block.offset < (uint16)_bufSize,
"Relocation block outside of script\n");
- int count = READ_LE_UINT16(scr->_buf + block.offset);
+ int count = READ_LE_UINT16(_buf + block.offset);
for (int i = 0; i <= count; i++) {
- int pos = READ_LE_UINT16(scr->_buf + block.offset + 2 + (i * 2));
+ int pos = READ_LE_UINT16(_buf + block.offset + 2 + (i * 2));
if (!pos)
continue; // FIXME: A hack pending investigation
@@ -362,26 +351,26 @@ void Script::scriptRelocate(reg_t block) {
bool done = false;
uint k;
- for (k = 0; !done && k < scr->_objects.size(); k++) {
- if (relocateObject(&scr->_objects[k], block.segment, pos))
+ for (k = 0; !done && k < _objects.size(); k++) {
+ if (relocateObject(&_objects[k], block.segment, pos))
done = true;
}
- for (k = 0; !done && k < scr->_codeBlocks.size(); k++) {
- if (pos >= scr->_codeBlocks[k].pos.offset &&
- pos < scr->_codeBlocks[k].pos.offset + scr->_codeBlocks[k].size)
+ for (k = 0; !done && k < _codeBlocks.size(); k++) {
+ if (pos >= _codeBlocks[k].pos.offset &&
+ pos < _codeBlocks[k].pos.offset + _codeBlocks[k].size)
done = true;
}
if (!done) {
printf("While processing relocation block %04x:%04x:\n", PRINT_REG(block));
printf("Relocation failed for index %04x (%d/%d)\n", pos, i + 1, count);
- if (scr->_localsBlock)
- printf("- locals: %d at %04x\n", scr->_localsBlock->_locals.size(), scr->_localsOffset);
+ if (_localsBlock)
+ printf("- locals: %d at %04x\n", _localsBlock->_locals.size(), _localsOffset);
else
printf("- No locals\n");
- for (k = 0; k < scr->_objects.size(); k++)
- printf("- obj#%d at %04x w/ %d vars\n", k, scr->_objects[k].pos.offset, scr->_objects[k]._variables.size());
+ for (k = 0; k < _objects.size(); k++)
+ printf("- obj#%d at %04x w/ %d vars\n", k, _objects[k].pos.offset, _objects[k]._variables.size());
// SQ3 script 71 has broken relocation entries.
printf("Trying to continue anyway...\n");
}
@@ -390,38 +379,35 @@ void Script::scriptRelocate(reg_t block) {
}
void Script::heapRelocate(reg_t block) {
- Script *scr = this; // FIXME: Hack
-
- VERIFY(block.offset < (uint16)scr->_heapSize && READ_LE_UINT16(scr->_heapStart + block.offset) * 2 + block.offset < (uint16)scr->_bufSize,
+ VERIFY(block.offset < (uint16)_heapSize && READ_LE_UINT16(_heapStart + block.offset) * 2 + block.offset < (uint16)_bufSize,
"Relocation block outside of script\n");
- if (scr->_relocated)
+ if (_relocated)
return;
- scr->_relocated = true;
- int count = READ_LE_UINT16(scr->_heapStart + block.offset);
+ _relocated = true;
+ int count = READ_LE_UINT16(_heapStart + block.offset);
for (int i = 0; i < count; i++) {
- int pos = READ_LE_UINT16(scr->_heapStart + block.offset + 2 + (i * 2)) + scr->_scriptSize;
+ int pos = READ_LE_UINT16(_heapStart + block.offset + 2 + (i * 2)) + _scriptSize;
if (!relocateLocal(block.segment, pos)) {
bool done = false;
uint k;
- for (k = 0; !done && k < scr->_objects.size(); k++) {
- if (relocateObject(&scr->_objects[k], block.segment, pos))
+ for (k = 0; !done && k < _objects.size(); k++) {
+ if (relocateObject(&_objects[k], block.segment, pos))
done = true;
}
if (!done) {
printf("While processing relocation block %04x:%04x:\n", PRINT_REG(block));
printf("Relocation failed for index %04x (%d/%d)\n", pos, i + 1, count);
- if (scr->_localsBlock)
- printf("- locals: %d at %04x\n", scr->_localsBlock->_locals.size(), scr->_localsOffset);
+ if (_localsBlock)
+ printf("- locals: %d at %04x\n", _localsBlock->_locals.size(), _localsOffset);
else
printf("- No locals\n");
- for (k = 0; k < scr->_objects.size(); k++)
- printf("- obj#%d at %04x w/ %d vars\n", k, scr->_objects[k].pos.offset, scr->_objects[k]._variables.size());
- printf("Triggering breakpoint...\n");
+ for (k = 0; k < _objects.size(); k++)
+ printf("- obj#%d at %04x w/ %d vars\n", k, _objects[k].pos.offset, _objects[k]._variables.size());
error("Breakpoint in %s, line %d", __FILE__, __LINE__);
}
}
@@ -480,16 +466,14 @@ Object *Script::scriptObjInit0(reg_t obj_pos) {
SciVersion version = _sciVersion; // for the offset defines
uint base = obj_pos.offset - SCRIPT_OBJECT_MAGIC_OFFSET;
- Script *scr = this; // FIXME: Hack
-
- VERIFY(base < scr->_bufSize, "Attempt to initialize object beyond end of script\n");
+ VERIFY(base < _bufSize, "Attempt to initialize object beyond end of script\n");
- obj = scr->allocateObject(base);
+ obj = allocateObject(base);
- VERIFY(base + SCRIPT_FUNCTAREAPTR_OFFSET < scr->_bufSize, "Function area pointer stored beyond end of script\n");
+ VERIFY(base + SCRIPT_FUNCTAREAPTR_OFFSET < _bufSize, "Function area pointer stored beyond end of script\n");
{
- byte *data = (byte *)(scr->_buf + base);
+ byte *data = (byte *)(_buf + base);
int funct_area = READ_LE_UINT16(data + SCRIPT_FUNCTAREAPTR_OFFSET);
int variables_nr;
int functions_nr;
@@ -499,7 +483,7 @@ Object *Script::scriptObjInit0(reg_t obj_pos) {
obj->flags = 0;
obj->pos = make_reg(obj_pos.segment, base);
- VERIFY(base + funct_area < scr->_bufSize, "Function area pointer references beyond end of script");
+ VERIFY(base + funct_area < _bufSize, "Function area pointer references beyond end of script");
variables_nr = READ_LE_UINT16(data + SCRIPT_SELECTORCTR_OFFSET);
functions_nr = READ_LE_UINT16(data + funct_area - 2);
@@ -507,12 +491,12 @@ Object *Script::scriptObjInit0(reg_t obj_pos) {
VERIFY(base + funct_area + functions_nr * 2
// add again for classes, since those also store selectors
- + (is_class ? functions_nr * 2 : 0) < scr->_bufSize, "Function area extends beyond end of script");
+ + (is_class ? functions_nr * 2 : 0) < _bufSize, "Function area extends beyond end of script");
obj->_variables.resize(variables_nr);
obj->methods_nr = functions_nr;
- obj->base = scr->_buf;
+ obj->base = _buf;
obj->base_obj = data;
obj->base_method = (uint16 *)(data + funct_area);
obj->base_vars = NULL;
@@ -528,18 +512,16 @@ Object *Script::scriptObjInit11(reg_t obj_pos) {
Object *obj;
uint base = obj_pos.offset;
- Script *scr = this; // FIXME: Hack
-
- VERIFY(base < scr->_bufSize, "Attempt to initialize object beyond end of script\n");
+ VERIFY(base < _bufSize, "Attempt to initialize object beyond end of script\n");
- obj = scr->allocateObject(base);
+ obj = allocateObject(base);
- VERIFY(base + SCRIPT_FUNCTAREAPTR_OFFSET < scr->_bufSize, "Function area pointer stored beyond end of script\n");
+ VERIFY(base + SCRIPT_FUNCTAREAPTR_OFFSET < _bufSize, "Function area pointer stored beyond end of script\n");
{
- byte *data = (byte *)(scr->_buf + base);
- uint16 *funct_area = (uint16 *)(scr->_buf + READ_LE_UINT16(data + 6));
- uint16 *prop_area = (uint16 *)(scr->_buf + READ_LE_UINT16(data + 4));
+ byte *data = (byte *)(_buf + base);
+ uint16 *funct_area = (uint16 *)(_buf + READ_LE_UINT16(data + 6));
+ uint16 *prop_area = (uint16 *)(_buf + READ_LE_UINT16(data + 4));
int variables_nr;
int functions_nr;
int is_class;
@@ -548,7 +530,7 @@ Object *Script::scriptObjInit11(reg_t obj_pos) {
obj->flags = 0;
obj->pos = obj_pos;
- VERIFY((byte *) funct_area < scr->_buf + scr->_bufSize, "Function area pointer references beyond end of script");
+ VERIFY((byte *) funct_area < _buf + _bufSize, "Function area pointer references beyond end of script");
variables_nr = READ_LE_UINT16(data + 2);
functions_nr = READ_LE_UINT16(funct_area);
@@ -557,13 +539,13 @@ Object *Script::scriptObjInit11(reg_t obj_pos) {
obj->base_method = funct_area;
obj->base_vars = prop_area;
- VERIFY(((byte *) funct_area + functions_nr) < scr->_buf + scr->_bufSize, "Function area extends beyond end of script");
+ VERIFY(((byte *) funct_area + functions_nr) < _buf + _bufSize, "Function area extends beyond end of script");
obj->variable_names_nr = variables_nr;
obj->_variables.resize(variables_nr);
obj->methods_nr = functions_nr;
- obj->base = scr->_buf;
+ obj->base = _buf;
obj->base_obj = data;
for (i = 0; i < variables_nr; i++)
diff --git a/engines/sci/engine/seg_manager.h b/engines/sci/engine/seg_manager.h
index f44616406d..277b734f60 100644
--- a/engines/sci/engine/seg_manager.h
+++ b/engines/sci/engine/seg_manager.h
@@ -76,15 +76,8 @@ public:
/**
* Forcefully deallocate a previously allocated script.
* @param script_nr number of the script to deallocate
- * @return 1 on success, 0 on failure
*/
- int deallocateScript(int script_nr);
-
- /**
- * Determines whether a script has been loaded yet.
- * @param seg ID of the script segment to check for
- */
- bool scriptIsLoaded(SegmentId seg);
+ void deallocateScript(int script_nr);
/**
* Validate whether the specified public function is exported by
@@ -162,17 +155,6 @@ public:
*/
void setExportAreWide(bool flag);
- /**
- * Determines whether the script referenced by the indicated segment
- * is marked as being deleted.
- * Will return 0 when applied to an invalid or non-script seg.
- * @param seg Segment ID of the script to investigate
- * @return 1 iff seg points to a script and the segment is
- * deleted, 0 otherwise
- */
- bool scriptIsMarkedAsDeleted(SegmentId seg);
-
-
// 2. Clones
/**
@@ -352,6 +334,9 @@ public:
*/
bool isObject(reg_t obj) { return getObject(obj) != NULL; }
+ // TODO: document this
+ bool isHeapObject(reg_t pos);
+
/**
* Determines the name of an object
* @param[in] pos Location (segment, offset) of the object
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 18:53:55 +0000