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TVM_FFI_THROW(RuntimeError) << "error message";
}
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* \file tvm/ffi/error.h
* \brief Error handling component.
*/
#ifndef TVM_FFI_ERROR_H_
#define TVM_FFI_ERROR_H_
#include <tvm/ffi/base_details.h>
#include <tvm/ffi/c_api.h>
#include <tvm/ffi/memory.h>
#include <tvm/ffi/object.h>
#include <cstring>
#include <iostream>
#include <memory>
#include <sstream>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#ifndef TVM_FFI_USE_LIBBACKTRACE
#define TVM_FFI_USE_LIBBACKTRACE 1
#endif
#ifndef TVM_FFI_BACKTRACE_ON_SEGFAULT
#define TVM_FFI_BACKTRACE_ON_SEGFAULT 1
#endif
#ifndef TVM_FFI_ALWAYS_LOG_BEFORE_THROW
#define TVM_FFI_ALWAYS_LOG_BEFORE_THROW 0
#endif
namespace tvm {
namespace ffi {
struct EnvErrorAlreadySet : public std::exception {};
class ErrorObj : public Object, public TVMFFIErrorCell {
public:
static constexpr const int32_t _type_index = TypeIndex::kTVMFFIError;
TVM_FFI_DECLARE_OBJECT_INFO_STATIC("ffi.Error", ErrorObj, Object);
};
namespace details {
class ErrorObjFromStd : public ErrorObj {
public:
ErrorObjFromStd(std::string kind, std::string message, std::string backtrace)
: kind_data_(kind), message_data_(message), backtrace_data_(backtrace) {
this->kind = TVMFFIByteArray{kind_data_.data(), kind_data_.length()};
this->message = TVMFFIByteArray{message_data_.data(), message_data_.length()};
this->backtrace = TVMFFIByteArray{backtrace_data_.data(), backtrace_data_.length()};
this->update_backtrace = UpdateBacktrace;
}
private:
static void UpdateBacktrace(TVMFFIObjectHandle self, const TVMFFIByteArray* backtrace_str,
int32_t update_mode) {
ErrorObjFromStd* obj = static_cast<ErrorObjFromStd*>(self);
if (update_mode == kTVMFFIBacktraceUpdateModeReplace) {
obj->backtrace_data_.resize(backtrace_str->size);
std::memcpy(obj->backtrace_data_.data(), backtrace_str->data, backtrace_str->size);
obj->backtrace = TVMFFIByteArray{obj->backtrace_data_.data(), obj->backtrace_data_.length()};
} else {
obj->backtrace_data_.append(backtrace_str->data, backtrace_str->size);
obj->backtrace = TVMFFIByteArray{obj->backtrace_data_.data(), obj->backtrace_data_.length()};
}
}
std::string kind_data_;
std::string message_data_;
std::string backtrace_data_;
};
} // namespace details
class Error : public ObjectRef, public std::exception {
public:
Error(std::string kind, std::string message, std::string backtrace) {
data_ = make_object<details::ErrorObjFromStd>(kind, message, backtrace);
}
Error(std::string kind, std::string message, const TVMFFIByteArray* backtrace)
: Error(kind, message, std::string(backtrace->data, backtrace->size)) {}
std::string kind() const {
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
return std::string(obj->kind.data, obj->kind.size);
}
std::string message() const {
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
return std::string(obj->message.data, obj->message.size);
}
std::string backtrace() const {
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
return std::string(obj->backtrace.data, obj->backtrace.size);
}
std::string TracebackMostRecentCallLast() const {
// add placeholder for the first line
std::vector<int64_t> line_breakers = {-1};
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
for (size_t i = 0; i < obj->backtrace.size; i++) {
if (obj->backtrace.data[i] == '\n') {
line_breakers.push_back(i);
}
}
std::string result;
result.reserve(obj->backtrace.size);
for (size_t i = line_breakers.size() - 1; i > 0; --i) {
int64_t line_start = line_breakers[i - 1] + 1;
int64_t line_end = line_breakers[i];
if (line_start == line_end) continue;
result.append(obj->backtrace.data + line_start, line_end - line_start);
result.append("\n");
}
return result;
}
void UpdateBacktrace(const TVMFFIByteArray* backtrace_str, int32_t update_mode) {
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
obj->update_backtrace(obj, backtrace_str, update_mode);
}
const char* what() const noexcept(true) override {
thread_local std::string what_data;
ErrorObj* obj = static_cast<ErrorObj*>(data_.get());
what_data = (std::string("Traceback (most recent call last):\n") +
TracebackMostRecentCallLast() + std::string(obj->kind.data, obj->kind.size) +
std::string(": ") + std::string(obj->message.data, obj->message.size) + '\n');
return what_data.c_str();
}
TVM_FFI_DEFINE_OBJECT_REF_METHODS_NOTNULLABLE(Error, ObjectRef, ErrorObj);
};
namespace details {
class ErrorBuilder {
public:
explicit ErrorBuilder(std::string kind, std::string backtrace, bool log_before_throw)
: kind_(kind), backtrace_(backtrace), log_before_throw_(log_before_throw) {}
explicit ErrorBuilder(std::string kind, const TVMFFIByteArray* backtrace, bool log_before_throw)
: ErrorBuilder(kind, std::string(backtrace->data, backtrace->size), log_before_throw) {}
// MSVC disable warning in error builder as it is exepected
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4722)
#endif
// avoid inline to reduce binary size, error throw path do not need to be fast
[[noreturn]] ~ErrorBuilder() noexcept(false) {
::tvm::ffi::Error error(std::move(kind_), stream_.str(), std::move(backtrace_));
if (log_before_throw_) {
std::cerr << error.what();
}
throw error;
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
std::ostringstream& stream() { return stream_; }
protected:
std::string kind_;
std::ostringstream stream_;
std::string backtrace_;
bool log_before_throw_;
};
} // namespace details
#define TVM_FFI_THROW(ErrorKind) \
::tvm::ffi::details::ErrorBuilder(#ErrorKind, \
TVMFFIBacktrace(__FILE__, __LINE__, TVM_FFI_FUNC_SIG, 0), \
TVM_FFI_ALWAYS_LOG_BEFORE_THROW) \
.stream()
#define TVM_FFI_LOG_AND_THROW(ErrorKind) \
::tvm::ffi::details::ErrorBuilder( \
#ErrorKind, TVMFFIBacktrace(__FILE__, __LINE__, TVM_FFI_FUNC_SIG, 0), true) \
.stream()
// Glog style checks with TVM_FFI prefix
// NOTE: we explicitly avoid glog style generic macros (LOG/CHECK) in tvm ffi
// to avoid potential conflict of downstream users who might have their own GLOG style macros
namespace details {
template <typename X, typename Y>
TVM_FFI_INLINE std::unique_ptr<std::string> LogCheckFormat(const X& x, const Y& y) {
std::ostringstream os;
os << " (" << x << " vs. " << y << ") "; // CHECK_XX(x, y) requires x and y can be serialized to
// string. Use CHECK(x OP y) otherwise.
return std::make_unique<std::string>(os.str());
}
#define TVM_FFI_CHECK_FUNC(name, op) \
template <typename X, typename Y> \
TVM_FFI_INLINE std::unique_ptr<std::string> LogCheck##name(const X& x, const Y& y) { \
if (x op y) return nullptr; \
return LogCheckFormat(x, y); \
} \
TVM_FFI_INLINE std::unique_ptr<std::string> LogCheck##name(int x, int y) { \
return LogCheck##name<int, int>(x, y); \
}
// Inline _Pragma in macros does not work reliably on old version of MSVC and
// GCC. We wrap all comparisons in a function so that we can use #pragma to
// silence bad comparison warnings.
#if defined(__GNUC__) || defined(__clang__) // GCC and Clang
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsign-compare"
#elif defined(_MSC_VER) // MSVC
#pragma warning(push)
#pragma warning(disable : 4389) // '==' : signed/unsigned mismatch
#endif
TVM_FFI_CHECK_FUNC(_LT, <)
TVM_FFI_CHECK_FUNC(_GT, >)
TVM_FFI_CHECK_FUNC(_LE, <=)
TVM_FFI_CHECK_FUNC(_GE, >=)
TVM_FFI_CHECK_FUNC(_EQ, ==)
TVM_FFI_CHECK_FUNC(_NE, !=)
#if defined(__GNUC__) || defined(__clang__) // GCC and Clang
#pragma GCC diagnostic pop
#elif defined(_MSC_VER) // MSVC
#pragma warning(pop)
#endif
} // namespace details
#define TVM_FFI_ICHECK_BINARY_OP(name, op, x, y) \
if (auto __tvm__log__err = ::tvm::ffi::details::LogCheck##name(x, y)) \
TVM_FFI_THROW(InternalError) << "Check failed: " << #x " " #op " " #y << *__tvm__log__err << ": "
#define TVM_FFI_ICHECK(x) \
if (!(x)) TVM_FFI_THROW(InternalError) << "Check failed: (" #x << ") is false: "
#define TVM_FFI_CHECK(cond, ErrorKind) \
if (!(cond)) TVM_FFI_THROW(ErrorKind) << "Check failed: (" #cond << ") is false: "
#define TVM_FFI_ICHECK_LT(x, y) TVM_FFI_ICHECK_BINARY_OP(_LT, <, x, y)
#define TVM_FFI_ICHECK_GT(x, y) TVM_FFI_ICHECK_BINARY_OP(_GT, >, x, y)
#define TVM_FFI_ICHECK_LE(x, y) TVM_FFI_ICHECK_BINARY_OP(_LE, <=, x, y)
#define TVM_FFI_ICHECK_GE(x, y) TVM_FFI_ICHECK_BINARY_OP(_GE, >=, x, y)
#define TVM_FFI_ICHECK_EQ(x, y) TVM_FFI_ICHECK_BINARY_OP(_EQ, ==, x, y)
#define TVM_FFI_ICHECK_NE(x, y) TVM_FFI_ICHECK_BINARY_OP(_NE, !=, x, y)
#define TVM_FFI_ICHECK_NOTNULL(x) \
((x) == nullptr ? TVM_FFI_THROW(InternalError) << "Check not null: " #x << ' ', \
(x) : (x)) // NOLINT(*)
} // namespace ffi
} // namespace tvm
#endif // TVM_FFI_ERROR_H_