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#include <stddef.h>
#include <atomic>
#include <memory>
#include <vector>
#include "RuntimePrivate.h"
#include "WAVM/Inline/Assert.h"
#include "WAVM/Inline/BasicTypes.h"
#include "WAVM/Inline/Timing.h"
#include "WAVM/Platform/Memory.h"
#include "WAVM/Platform/RWMutex.h"
#include "WAVM/Runtime/Runtime.h"
#include "WAVM/RuntimeABI/RuntimeABI.h"
using namespace WAVM;
using namespace WAVM::Runtime;
Runtime::Compartment::Compartment(std::string&& inDebugName,
struct CompartmentRuntimeData* inRuntimeData,
U8* inUnalignedRuntimeData)
: GCObject(ObjectKind::compartment, this, std::move(inDebugName))
, runtimeData(inRuntimeData)
, unalignedRuntimeData(inUnalignedRuntimeData)
, tables(0, maxTables - 1)
, memories(0, maxMemories - 1)
// Use UINTPTR_MAX as an invalid ID for globals, exception types, and instances.
, globals(0, UINTPTR_MAX - 1)
, exceptionTypes(0, UINTPTR_MAX - 1)
, instances(0, UINTPTR_MAX - 1)
, contexts(0, maxContexts - 1)
, foreigns(0, UINTPTR_MAX - 1)
{
runtimeData->compartment = this;
}
Runtime::Compartment::~Compartment()
{
Platform::RWMutex::ExclusiveLock compartmentLock(mutex);
WAVM_ASSERT(!memories.size());
WAVM_ASSERT(!tables.size());
WAVM_ASSERT(!exceptionTypes.size());
WAVM_ASSERT(!globals.size());
WAVM_ASSERT(!instances.size());
WAVM_ASSERT(!contexts.size());
WAVM_ASSERT(!foreigns.size());
Platform::freeAlignedVirtualPages(unalignedRuntimeData,
compartmentReservedBytes >> Platform::getBytesPerPageLog2(),
compartmentRuntimeDataAlignmentLog2);
Platform::deregisterVirtualAllocation(offsetof(CompartmentRuntimeData, contexts));
}
static CompartmentRuntimeData* initCompartmentRuntimeData(U8*& outUnalignedRuntimeData)
{
CompartmentRuntimeData* runtimeData
= (CompartmentRuntimeData*)Platform::allocateAlignedVirtualPages(
compartmentReservedBytes >> Platform::getBytesPerPageLog2(),
compartmentRuntimeDataAlignmentLog2,
outUnalignedRuntimeData);
WAVM_ERROR_UNLESS(Platform::commitVirtualPages(
(U8*)runtimeData,
offsetof(CompartmentRuntimeData, contexts) >> Platform::getBytesPerPageLog2()));
Platform::registerVirtualAllocation(offsetof(CompartmentRuntimeData, contexts));
return runtimeData;
}
Compartment* Runtime::createCompartment(std::string&& debugName)
{
U8* unalignedRuntimeData = nullptr;
CompartmentRuntimeData* runtimeData = initCompartmentRuntimeData(unalignedRuntimeData);
if(!runtimeData) { return nullptr; }
return new Compartment(std::move(debugName), runtimeData, unalignedRuntimeData);
}
Compartment* Runtime::cloneCompartment(const Compartment* compartment, std::string&& debugName)
{
Timing::Timer timer;
U8* unalignedRuntimeData = nullptr;
CompartmentRuntimeData* runtimeData = initCompartmentRuntimeData(unalignedRuntimeData);
if(!runtimeData) { return nullptr; }
Compartment* newCompartment
= new Compartment(std::move(debugName), runtimeData, unalignedRuntimeData);
if(!newCompartment) { goto error; }
else
{
Platform::RWMutex::ShareableLock compartmentLock(compartment->mutex);
// Clone tables.
for(Table* table : compartment->tables)
{
Table* newTable = cloneTable(table, newCompartment);
if(!newTable) { goto error; }
WAVM_ASSERT(newTable->id == table->id);
}
// Clone memories.
for(Memory* memory : compartment->memories)
{
Memory* newMemory = cloneMemory(memory, newCompartment);
if(!newMemory) { goto error; }
WAVM_ASSERT(newMemory->id == memory->id);
}
// Clone globals.
newCompartment->globalDataAllocationMask = compartment->globalDataAllocationMask;
memcpy(newCompartment->initialContextMutableGlobals,
compartment->initialContextMutableGlobals,
sizeof(newCompartment->initialContextMutableGlobals));
for(Global* global : compartment->globals)
{
Global* newGlobal = cloneGlobal(global, newCompartment);
if(!newGlobal) { goto error; }
WAVM_ASSERT(newGlobal->id == global->id);
WAVM_ASSERT(newGlobal->mutableGlobalIndex == global->mutableGlobalIndex);
}
// Clone exception types.
for(ExceptionType* exceptionType : compartment->exceptionTypes)
{
ExceptionType* newExceptionType = cloneExceptionType(exceptionType, newCompartment);
if(!newExceptionType) { goto error; }
WAVM_ASSERT(newExceptionType->id == exceptionType->id);
}
// Clone instances.
for(Instance* instance : compartment->instances)
{
Instance* newInstance = cloneInstance(instance, newCompartment);
if(!newInstance) { goto error; }
WAVM_ASSERT(newInstance->id == instance->id);
}
Timing::logTimer("Cloned compartment", timer);
return newCompartment;
}
error:
// If there was an error, clean up the partially created compartment.
if(newCompartment)
{ WAVM_ERROR_UNLESS(tryCollectCompartment(GCPointer<Compartment>(newCompartment))); }
return nullptr;
}
Object* Runtime::remapToClonedCompartment(const Object* object, const Compartment* newCompartment)
{
if(!object) { return nullptr; }
if(object->kind == ObjectKind::function) { return const_cast<Object*>(object); }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
switch(object->kind)
{
case ObjectKind::table: return newCompartment->tables[asTable(object)->id];
case ObjectKind::memory: return newCompartment->memories[asMemory(object)->id];
case ObjectKind::global: return newCompartment->globals[asGlobal(object)->id];
case ObjectKind::exceptionType:
return newCompartment->exceptionTypes[asExceptionType(object)->id];
case ObjectKind::instance: return newCompartment->instances[asInstance(object)->id];
case ObjectKind::function:
case ObjectKind::context:
case ObjectKind::compartment:
case ObjectKind::foreign:
case ObjectKind::invalid:
default: WAVM_UNREACHABLE();
};
}
Function* Runtime::remapToClonedCompartment(const Function* function,
const Compartment* newCompartment)
{
return const_cast<Function*>(function);
}
Table* Runtime::remapToClonedCompartment(const Table* table, const Compartment* newCompartment)
{
if(!table) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->tables[table->id];
}
Memory* Runtime::remapToClonedCompartment(const Memory* memory, const Compartment* newCompartment)
{
if(!memory) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->memories[memory->id];
}
Global* Runtime::remapToClonedCompartment(const Global* global, const Compartment* newCompartment)
{
if(!global) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->globals[global->id];
}
ExceptionType* Runtime::remapToClonedCompartment(const ExceptionType* exceptionType,
const Compartment* newCompartment)
{
if(!exceptionType) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->exceptionTypes[exceptionType->id];
}
Instance* Runtime::remapToClonedCompartment(const Instance* instance,
const Compartment* newCompartment)
{
if(!instance) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->instances[instance->id];
}
Foreign* Runtime::remapToClonedCompartment(const Foreign* foreign,
const Compartment* newCompartment)
{
if(!foreign) { return nullptr; }
Platform::RWMutex::ShareableLock compartmentLock(newCompartment->mutex);
return newCompartment->foreigns[foreign->id];
}
bool Runtime::isInCompartment(const Object* object, const Compartment* compartment)
{
if(object->kind == ObjectKind::function)
{
// The function may be in multiple compartments, but if this compartment maps the function's
// instanceId to a Instance with the LLVMJIT LoadedModule that contains this
// function, then the function is in this compartment.
Function* function = (Function*)object;
// Treat functions with instanceId=UINTPTR_MAX as if they are in all compartments.
if(function->instanceId == UINTPTR_MAX) { return true; }
Platform::RWMutex::ShareableLock compartmentLock(compartment->mutex);
if(!compartment->instances.contains(function->instanceId)) { return false; }
Instance* instance = compartment->instances[function->instanceId];
return instance->jitModule.get() == function->mutableData->jitModule;
}
else
{
GCObject* gcObject = (GCObject*)object;
return gcObject->compartment == compartment;
}
}
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