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// This file is part of AsmJit project <https://asmjit.com>
//
// See asmjit.h or LICENSE.md for license and copyright information
// SPDX-License-Identifier: Zlib
#include "../core/api-build_p.h"
#ifndef ASMJIT_NO_JIT
#include "../core/cpuinfo.h"
#include "../core/jitruntime.h"
ASMJIT_BEGIN_NAMESPACE
JitRuntime::JitRuntime(const JitAllocator::CreateParams* params) noexcept
: _allocator(params) {
_environment = Environment::host();
_environment.setObjectFormat(ObjectFormat::kJIT);
}
JitRuntime::~JitRuntime() noexcept {}
Error JitRuntime::_add(void** dst, CodeHolder* code) noexcept {
*dst = nullptr;
ASMJIT_PROPAGATE(code->flatten());
ASMJIT_PROPAGATE(code->resolveUnresolvedLinks());
size_t estimatedCodeSize = code->codeSize();
if (ASMJIT_UNLIKELY(estimatedCodeSize == 0))
return DebugUtils::errored(kErrorNoCodeGenerated);
uint8_t* rx;
uint8_t* rw;
ASMJIT_PROPAGATE(_allocator.alloc((void**)&rx, (void**)&rw, estimatedCodeSize));
// Relocate the code.
Error err = code->relocateToBase(uintptr_t((void*)rx));
if (ASMJIT_UNLIKELY(err)) {
_allocator.release(rx);
return err;
}
// Recalculate the final code size and shrink the memory we allocated for it
// in case that some relocations didn't require records in an address table.
size_t codeSize = code->codeSize();
if (codeSize < estimatedCodeSize)
_allocator.shrink(rx, codeSize);
{
VirtMem::ProtectJitReadWriteScope rwScope(rx, codeSize);
for (Section* section : code->_sections) {
size_t offset = size_t(section->offset());
size_t bufferSize = size_t(section->bufferSize());
size_t virtualSize = size_t(section->virtualSize());
ASMJIT_ASSERT(offset + bufferSize <= codeSize);
memcpy(rw + offset, section->data(), bufferSize);
if (virtualSize > bufferSize) {
ASMJIT_ASSERT(offset + virtualSize <= codeSize);
memset(rw + offset + bufferSize, 0, virtualSize - bufferSize);
}
}
}
*dst = rx;
return kErrorOk;
}
Error JitRuntime::_release(void* p) noexcept {
return _allocator.release(p);
}
ASMJIT_END_NAMESPACE
#endif
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