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#include "execution_stack.h"
#if defined(_unix_)
# include <sys/mman.h>
# include <limits.h>
# include <unistd.h>
# if !defined(__x86_64__) && !defined(__arm64__) && !defined(__aarch64__)
# error Unsupported platform
# endif
#endif
#include <library/cpp/yt/memory/ref.h>
#include <library/cpp/yt/memory/ref_tracked.h>
#include <library/cpp/yt/misc/tls.h>
#include <library/cpp/yt/error/error.h>
#include <library/cpp/yt/system/exit.h>
namespace NYT::NThreading {
////////////////////////////////////////////////////////////////////////////////
TExecutionStackBase::TExecutionStackBase(size_t size)
: Size_(RoundUpToPage(size))
{
auto cookie = GetRefCountedTypeCookie<TExecutionStack>();
TRefCountedTrackerFacade::AllocateInstance(cookie);
TRefCountedTrackerFacade::AllocateSpace(cookie, Size_);
}
TExecutionStackBase::~TExecutionStackBase()
{
auto cookie = GetRefCountedTypeCookie<TExecutionStack>();
TRefCountedTrackerFacade::FreeInstance(cookie);
TRefCountedTrackerFacade::FreeSpace(cookie, Size_);
}
void* TExecutionStackBase::GetStack() const
{
return Stack_;
}
size_t TExecutionStackBase::GetSize() const
{
return Size_;
}
////////////////////////////////////////////////////////////////////////////////
#if defined(_unix_)
TExecutionStack::TExecutionStack(size_t size)
: TExecutionStackBase(size)
{
size_t guardSize = GuardPageCount * GetPageSize();
int flags =
#if defined(_darwin_)
MAP_ANON | MAP_PRIVATE;
#else
MAP_ANONYMOUS | MAP_PRIVATE;
#endif
Base_ = reinterpret_cast<char*>(::mmap(
0,
guardSize * 2 + Size_,
PROT_READ | PROT_WRITE,
flags,
-1,
0));
auto handleError = [&] {
AbortProcessDramatically(
EProcessExitCode::OutOfMemory,
Format("Error creating execution stack (Size: %v): %v",
Size_,
TError::FromSystem()));
};
if (Base_ == MAP_FAILED) {
handleError();
}
if (::mprotect(Base_, guardSize, PROT_NONE) == -1) {
handleError();
}
if (::mprotect(Base_ + guardSize + Size_, guardSize, PROT_NONE) == -1) {
handleError();
}
Stack_ = Base_ + guardSize;
YT_VERIFY((reinterpret_cast<uintptr_t>(Stack_) & 15) == 0);
}
TExecutionStack::~TExecutionStack()
{
const size_t guardSize = GuardPageCount * GetPageSize();
::munmap(Base_, guardSize * 2 + Size_);
}
#elif defined(_win_)
TExecutionStack::TExecutionStack(size_t size)
: TExecutionStackBase(size)
, Handle_(::CreateFiber(Size_, &FiberTrampoline, this))
{ }
TExecutionStack::~TExecutionStack()
{
::DeleteFiber(Handle_);
}
YT_DEFINE_THREAD_LOCAL(void*, FiberTrampolineOpaque);
void TExecutionStack::SetOpaque(void* opaque)
{
FiberTrampolineOpaque() = opaque;
}
void* TExecutionStack::GetOpaque()
{
return FiberTrampolineOpaque();
}
void TExecutionStack::SetTrampoline(void (*trampoline)(void*))
{
YT_ASSERT(!Trampoline_);
Trampoline_ = trampoline;
}
VOID CALLBACK TExecutionStack::FiberTrampoline(PVOID opaque)
{
auto* stack = reinterpret_cast<TExecutionStack*>(opaque);
stack->Trampoline_(FiberTrampolineOpaque());
}
#else
# error Unsupported platform
#endif
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT::NThreading
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