crashpad/util/linux/auxiliary_vector.h
Mark Mentovai 6278690abe Update copyright boilerplate, 2022 edition (Crashpad)
sed -i '' -E -e 's/Copyright (.+) The Crashpad Authors\. All rights reserved\.$/Copyright \1 The Crashpad Authors/' $(git grep -El 'Copyright (.+) The Crashpad Authors\. All rights reserved\.$')

Bug: chromium:1098010
Change-Id: I8d6138469ddbe3d281a5d83f64cf918ec2491611
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3878262
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2022-09-06 23:54:07 +00:00

76 lines
2.3 KiB
C++

// Copyright 2017 The Crashpad Authors
//
// Licensed 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.
#ifndef CRASHPAD_UTIL_LINUX_AUXILIARY_VECTOR_H_
#define CRASHPAD_UTIL_LINUX_AUXILIARY_VECTOR_H_
#include <sys/types.h>
#include <map>
#include "base/logging.h"
#include "util/linux/ptrace_connection.h"
#include "util/misc/reinterpret_bytes.h"
namespace crashpad {
//! \brief Read the auxiliary vector for a target process.
class AuxiliaryVector {
public:
AuxiliaryVector();
AuxiliaryVector(const AuxiliaryVector&) = delete;
AuxiliaryVector& operator=(const AuxiliaryVector&) = delete;
~AuxiliaryVector();
//! \brief Initializes this object with the auxiliary vector for the process
//! connected via \a connection.
//!
//! This method must be called successfully prior to calling any other method
//! in this class.
//!
//! \param[in] connection A connection to the target process.
//!
//! \return `true` on success, `false` on failure with a message logged.
bool Initialize(PtraceConnection* connection);
//! \brief Retrieve a value from the vector.
//!
//! \param[in] type Specifies which value should be retrieved. The possible
//! values for this parameter are defined by `<linux/auxvec.h>`.
//! \param[out] value The value, casted to an appropriate type, if found.
//! \return `true` if the value is found.
template <typename V>
bool GetValue(uint64_t type, V* value) const {
auto iter = values_.find(type);
if (iter == values_.end()) {
LOG(ERROR) << "value not found";
return false;
}
return ReinterpretBytes(iter->second, value);
}
protected:
std::map<uint64_t, uint64_t> values_;
private:
template <typename ULong>
bool Read(PtraceConnection* connection);
};
} // namespace crashpad
#endif // CRASHPAD_UTIL_LINUX_AUXILIARY_VECTOR_H_