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-rw-r--r--src/script/api/script_object.cpp2
-rw-r--r--src/script/api/script_object.hpp2
-rw-r--r--src/script/script_instance.cpp8
-rw-r--r--src/script/script_instance.hpp3
-rw-r--r--src/script/squirrel.cpp148
-rw-r--r--src/script/squirrel.hpp30
6 files changed, 191 insertions, 2 deletions
diff --git a/src/script/api/script_object.cpp b/src/script/api/script_object.cpp
index 67ab7e40d..62a71574f 100644
--- a/src/script/api/script_object.cpp
+++ b/src/script/api/script_object.cpp
@@ -38,7 +38,7 @@ static ScriptStorage *GetStorage()
/* static */ ScriptInstance *ScriptObject::ActiveInstance::active = nullptr;
-ScriptObject::ActiveInstance::ActiveInstance(ScriptInstance *instance)
+ScriptObject::ActiveInstance::ActiveInstance(ScriptInstance *instance) : alc_scope(instance->engine)
{
this->last_active = ScriptObject::ActiveInstance::active;
ScriptObject::ActiveInstance::active = instance;
diff --git a/src/script/api/script_object.hpp b/src/script/api/script_object.hpp
index 6725f0ed1..55dd5e39b 100644
--- a/src/script/api/script_object.hpp
+++ b/src/script/api/script_object.hpp
@@ -18,6 +18,7 @@
#include "script_types.hpp"
#include "../script_suspend.hpp"
+#include "../squirrel.hpp"
/**
* The callback function for Mode-classes.
@@ -48,6 +49,7 @@ protected:
~ActiveInstance();
private:
ScriptInstance *last_active; ///< The active instance before we go instantiated.
+ ScriptAllocatorScope alc_scope; ///< Keep the correct allocator for the script instance activated
static ScriptInstance *active; ///< The global current active instance.
};
diff --git a/src/script/script_instance.cpp b/src/script/script_instance.cpp
index 336d3366a..9670e37c1 100644
--- a/src/script/script_instance.cpp
+++ b/src/script/script_instance.cpp
@@ -153,6 +153,8 @@ void ScriptInstance::Died()
DEBUG(script, 0, "The script died unexpectedly.");
this->is_dead = true;
+ this->last_allocated_memory = this->GetAllocatedMemory(); // Update cache
+
if (this->instance != nullptr) this->engine->ReleaseObject(this->instance);
delete this->engine;
this->instance = nullptr;
@@ -698,3 +700,9 @@ void ScriptInstance::InsertEvent(class ScriptEvent *event)
ScriptEventController::InsertEvent(event);
}
+
+size_t ScriptInstance::GetAllocatedMemory() const
+{
+ if (this->engine == nullptr) return this->last_allocated_memory;
+ return this->engine->GetAllocatedMemory();
+}
diff --git a/src/script/script_instance.hpp b/src/script/script_instance.hpp
index 56e830367..653ec3884 100644
--- a/src/script/script_instance.hpp
+++ b/src/script/script_instance.hpp
@@ -198,6 +198,8 @@ public:
*/
bool IsSleeping() { return this->suspend != 0; }
+ size_t GetAllocatedMemory() const;
+
protected:
class Squirrel *engine; ///< A wrapper around the squirrel vm.
const char *versionAPI; ///< Current API used by this script.
@@ -241,6 +243,7 @@ private:
int suspend; ///< The amount of ticks to suspend this script before it's allowed to continue.
bool is_paused; ///< Is the script paused? (a paused script will not be executed until unpaused)
Script_SuspendCallbackProc *callback; ///< Callback that should be called in the next tick the script runs.
+ size_t last_allocated_memory; ///< Last known allocated memory value (for display for crashed scripts)
/**
* Call the script Load function if it exists and data was loaded
diff --git a/src/script/squirrel.cpp b/src/script/squirrel.cpp
index fd0478bb5..ea63944ea 100644
--- a/src/script/squirrel.cpp
+++ b/src/script/squirrel.cpp
@@ -10,17 +10,127 @@
/** @file squirrel.cpp the implementation of the Squirrel class. It handles all Squirrel-stuff and gives a nice API back to work with. */
#include <stdarg.h>
+#include <map>
#include "../stdafx.h"
#include "../debug.h"
#include "squirrel_std.hpp"
#include "../fileio_func.h"
#include "../string_func.h"
+#include "script_fatalerror.hpp"
+#include "../settings_type.h"
#include <sqstdaux.h>
#include <../squirrel/sqpcheader.h>
#include <../squirrel/sqvm.h>
+#include "../core/alloc_func.hpp"
#include "../safeguards.h"
+/*
+ * If changing the call paths into the scripting engine, define this symbol to enable full debugging of allocations.
+ * This lets you track whether the allocator context is being switched correctly in all call paths.
+#define SCRIPT_DEBUG_ALLOCATIONS
+*/
+
+struct ScriptAllocator {
+ size_t allocated_size; ///< Sum of allocated data size
+ size_t allocation_limit; ///< Maximum this allocator may use before allocations fail
+
+ static const size_t SAFE_LIMIT = 0x8000000; ///< 128 MiB, a safe choice for almost any situation
+
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ std::map<void *, size_t> allocations;
+#endif
+
+ void CheckLimit() const
+ {
+ if (this->allocated_size > this->allocation_limit) throw Script_FatalError("Maximum memory allocation exceeded");
+ }
+
+ void *Malloc(SQUnsignedInteger size)
+ {
+ void *p = MallocT<char>(size);
+ this->allocated_size += size;
+
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ assert(p != nullptr);
+ assert(this->allocations.find(p) == this->allocations.end());
+ this->allocations[p] = size;
+#endif
+
+ return p;
+ }
+
+ void *Realloc(void *p, SQUnsignedInteger oldsize, SQUnsignedInteger size)
+ {
+ if (p == nullptr) {
+ return this->Malloc(size);
+ }
+ if (size == 0) {
+ this->Free(p, oldsize);
+ return nullptr;
+ }
+
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ assert(this->allocations[p] == oldsize);
+ this->allocations.erase(p);
+#endif
+
+ void *new_p = ReallocT<char>(static_cast<char *>(p), size);
+
+ this->allocated_size -= oldsize;
+ this->allocated_size += size;
+
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ assert(new_p != nullptr);
+ assert(this->allocations.find(p) == this->allocations.end());
+ this->allocations[new_p] = size;
+#endif
+
+ return new_p;
+ }
+
+ void Free(void *p, SQUnsignedInteger size)
+ {
+ if (p == nullptr) return;
+ free(p);
+
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ assert(this->allocations.at(p) == size);
+ this->allocations.erase(p);
+#endif
+ }
+
+ ScriptAllocator()
+ {
+ this->allocated_size = 0;
+ this->allocation_limit = static_cast<size_t>(_settings_game.script.script_max_memory_megabytes) << 20;
+ if (this->allocation_limit == 0) this->allocation_limit = SAFE_LIMIT; // in case the setting is somehow zero
+ }
+
+ ~ScriptAllocator()
+ {
+#ifdef SCRIPT_DEBUG_ALLOCATIONS
+ assert(this->allocations.size() == 0);
+#endif
+ }
+};
+
+ScriptAllocator *_squirrel_allocator = nullptr;
+
+/* See 3rdparty/squirrel/squirrel/sqmem.cpp for the default allocator implementation, which this overrides */
+#ifndef SQUIRREL_DEFAULT_ALLOCATOR
+void *sq_vm_malloc(SQUnsignedInteger size) { return _squirrel_allocator->Malloc(size); }
+void *sq_vm_realloc(void *p, SQUnsignedInteger oldsize, SQUnsignedInteger size) { return _squirrel_allocator->Realloc(p, oldsize, size); }
+void sq_vm_free(void *p, SQUnsignedInteger size) { _squirrel_allocator->Free(p, size); }
+#endif
+
+size_t Squirrel::GetAllocatedMemory() const noexcept
+{
+ assert(this->allocator != nullptr);
+ return this->allocator->allocated_size;
+}
+
+
void Squirrel::CompileError(HSQUIRRELVM vm, const SQChar *desc, const SQChar *source, SQInteger line, SQInteger column)
{
SQChar buf[1024];
@@ -115,6 +225,8 @@ void Squirrel::PrintFunc(HSQUIRRELVM vm, const SQChar *s, ...)
void Squirrel::AddMethod(const char *method_name, SQFUNCTION proc, uint nparam, const char *params, void *userdata, int size)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushstring(this->vm, method_name, -1);
if (size != 0) {
@@ -130,6 +242,8 @@ void Squirrel::AddMethod(const char *method_name, SQFUNCTION proc, uint nparam,
void Squirrel::AddConst(const char *var_name, int value)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushstring(this->vm, var_name, -1);
sq_pushinteger(this->vm, value);
sq_newslot(this->vm, -3, SQTrue);
@@ -137,6 +251,8 @@ void Squirrel::AddConst(const char *var_name, int value)
void Squirrel::AddConst(const char *var_name, bool value)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushstring(this->vm, var_name, -1);
sq_pushbool(this->vm, value);
sq_newslot(this->vm, -3, SQTrue);
@@ -144,6 +260,8 @@ void Squirrel::AddConst(const char *var_name, bool value)
void Squirrel::AddClassBegin(const char *class_name)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushroottable(this->vm);
sq_pushstring(this->vm, class_name, -1);
sq_newclass(this->vm, SQFalse);
@@ -151,6 +269,8 @@ void Squirrel::AddClassBegin(const char *class_name)
void Squirrel::AddClassBegin(const char *class_name, const char *parent_class)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushroottable(this->vm);
sq_pushstring(this->vm, class_name, -1);
sq_pushstring(this->vm, parent_class, -1);
@@ -164,6 +284,8 @@ void Squirrel::AddClassBegin(const char *class_name, const char *parent_class)
void Squirrel::AddClassEnd()
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_newslot(vm, -3, SQFalse);
sq_pop(vm, 1);
}
@@ -171,6 +293,8 @@ void Squirrel::AddClassEnd()
bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
{
assert(!this->crashed);
+ ScriptAllocatorScope alloc_scope(this);
+
int top = sq_gettop(this->vm);
/* Go to the instance-root */
sq_pushobject(this->vm, instance);
@@ -187,6 +311,8 @@ bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
bool Squirrel::Resume(int suspend)
{
assert(!this->crashed);
+ ScriptAllocatorScope alloc_scope(this);
+
/* Did we use more operations than we should have in the
* previous tick? If so, subtract that from the current run. */
if (this->overdrawn_ops > 0 && suspend > 0) {
@@ -200,23 +326,29 @@ bool Squirrel::Resume(int suspend)
this->crashed = !sq_resumecatch(this->vm, suspend);
this->overdrawn_ops = -this->vm->_ops_till_suspend;
+ this->allocator->CheckLimit();
return this->vm->_suspended != 0;
}
void Squirrel::ResumeError()
{
assert(!this->crashed);
+ ScriptAllocatorScope alloc_scope(this);
sq_resumeerror(this->vm);
}
void Squirrel::CollectGarbage()
{
+ ScriptAllocatorScope alloc_scope(this);
sq_collectgarbage(this->vm);
}
bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend)
{
assert(!this->crashed);
+ ScriptAllocatorScope alloc_scope(this);
+ this->allocator->CheckLimit();
+
/* Store the stack-location for the return value. We need to
* restore this after saving or the stack will be corrupted
* if we're in the middle of a DoCommand. */
@@ -325,17 +457,20 @@ bool Squirrel::CallBoolMethod(HSQOBJECT instance, const char *method_name, bool
bool Squirrel::CreateClassInstance(const char *class_name, void *real_instance, HSQOBJECT *instance)
{
+ ScriptAllocatorScope alloc_scope(this);
return Squirrel::CreateClassInstanceVM(this->vm, class_name, real_instance, instance, nullptr);
}
Squirrel::Squirrel(const char *APIName) :
- APIName(APIName)
+ APIName(APIName), allocator(new ScriptAllocator())
{
this->Initialize();
}
void Squirrel::Initialize()
{
+ ScriptAllocatorScope alloc_scope(this);
+
this->global_pointer = nullptr;
this->print_func = nullptr;
this->crashed = false;
@@ -432,6 +567,8 @@ static SQInteger _io_file_read(SQUserPointer file, SQUserPointer buf, SQInteger
SQRESULT Squirrel::LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printerror)
{
+ ScriptAllocatorScope alloc_scope(this);
+
FILE *file;
size_t size;
if (strncmp(this->GetAPIName(), "AI", 2) == 0) {
@@ -517,6 +654,8 @@ SQRESULT Squirrel::LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printer
bool Squirrel::LoadScript(HSQUIRRELVM vm, const char *script, bool in_root)
{
+ ScriptAllocatorScope alloc_scope(this);
+
/* Make sure we are always in the root-table */
if (in_root) sq_pushroottable(vm);
@@ -549,6 +688,8 @@ Squirrel::~Squirrel()
void Squirrel::Uninitialize()
{
+ ScriptAllocatorScope alloc_scope(this);
+
/* Clean up the stuff */
sq_pop(this->vm, 1);
sq_close(this->vm);
@@ -562,6 +703,8 @@ void Squirrel::Reset()
void Squirrel::InsertResult(bool result)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushbool(this->vm, result);
if (this->IsSuspended()) { // Called before resuming a suspended script?
vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
@@ -571,6 +714,8 @@ void Squirrel::InsertResult(bool result)
void Squirrel::InsertResult(int result)
{
+ ScriptAllocatorScope alloc_scope(this);
+
sq_pushinteger(this->vm, result);
if (this->IsSuspended()) { // Called before resuming a suspended script?
vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
@@ -600,6 +745,7 @@ void Squirrel::CrashOccurred()
bool Squirrel::CanSuspend()
{
+ ScriptAllocatorScope alloc_scope(this);
return sq_can_suspend(this->vm);
}
diff --git a/src/script/squirrel.hpp b/src/script/squirrel.hpp
index bec41f575..d0d02e80f 100644
--- a/src/script/squirrel.hpp
+++ b/src/script/squirrel.hpp
@@ -20,7 +20,11 @@ enum ScriptType {
ST_GS, ///< The script is for Game scripts.
};
+struct ScriptAllocator;
+
class Squirrel {
+ friend class ScriptAllocatorScope;
+
private:
typedef void (SQPrintFunc)(bool error_msg, const SQChar *message);
@@ -30,6 +34,7 @@ private:
bool crashed; ///< True if the squirrel script made an error.
int overdrawn_ops; ///< The amount of operations we have overdrawn.
const char *APIName; ///< Name of the API used for this squirrel.
+ std::unique_ptr<ScriptAllocator> allocator; ///< Allocator object used by this script.
/**
* The internal RunError handler. It looks up the real error and calls RunError with it.
@@ -272,6 +277,31 @@ public:
* Completely reset the engine; start from scratch.
*/
void Reset();
+
+ /**
+ * Get number of bytes allocated by this VM.
+ */
+ size_t GetAllocatedMemory() const noexcept;
+};
+
+
+extern ScriptAllocator *_squirrel_allocator;
+
+class ScriptAllocatorScope {
+ ScriptAllocator *old_allocator;
+
+public:
+ ScriptAllocatorScope(const Squirrel *engine)
+ {
+ this->old_allocator = _squirrel_allocator;
+ /* This may get called with a nullptr engine, in case of a crashed script */
+ _squirrel_allocator = engine != nullptr ? engine->allocator.get() : nullptr;
+ }
+
+ ~ScriptAllocatorScope()
+ {
+ _squirrel_allocator = this->old_allocator;
+ }
};
#endif /* SQUIRREL_HPP */
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-24 09:16:58 +0000