90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
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// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_SNAPSHOT_LINUX_DEBUG_RENDEZVOUS_H_
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#define CRASHPAD_SNAPSHOT_LINUX_DEBUG_RENDEZVOUS_H_
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#include <string>
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#include <vector>
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#include "util/linux/address_types.h"
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#include "util/misc/initialization_state_dcheck.h"
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#include "util/process/process_memory_range.h"
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namespace crashpad {
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//! \brief Reads an `r_debug` struct defined in `<link.h>` via
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//! ProcessMemoryRange.
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class DebugRendezvous {
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public:
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//! \brief An entry in the dynamic linker's list of loaded objects.
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//!
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//! All of these values should be checked before use. Whether and how they are
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//! populated may vary by dynamic linker.
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struct LinkEntry {
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LinkEntry();
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//! \brief A filename identifying the object.
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std::string name;
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//! \brief The difference between the preferred load address in the ELF file
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//! and the actual loaded address in memory.
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VMAddress load_bias;
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//! \brief The address of the dynamic array for this object.
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LinuxVMAddress dynamic_array;
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};
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DebugRendezvous();
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DebugRendezvous(const DebugRendezvous&) = delete;
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DebugRendezvous& operator=(const DebugRendezvous&) = delete;
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~DebugRendezvous();
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//! \brief Initializes this object by reading an `r_debug` struct from a
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//! target process.
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//!
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//! This method must be called successfully prior to calling any other method
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//! in this class.
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//!
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//! \param[in] memory A memory reader for the remote process.
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//! \param[in] address The address of an `r_debug` struct in the remote
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//! process.
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//! \return `true` on success. `false` on failure with a message logged.
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bool Initialize(const ProcessMemoryRange& memory, LinuxVMAddress address);
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//! \brief Returns the LinkEntry for the main executable.
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const LinkEntry* Executable() const;
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//! \brief Returns a vector of modules found in the link map.
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//!
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//! This list excludes the entry for the executable and may include entries
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//! for the VDSO and loader.
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const std::vector<LinkEntry>& Modules() const;
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private:
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template <typename Traits>
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bool InitializeSpecific(const ProcessMemoryRange& memory,
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LinuxVMAddress address);
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std::vector<LinkEntry> modules_;
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LinkEntry executable_;
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InitializationStateDcheck initialized_;
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};
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} // namespace crashpad
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#endif // CRASHPAD_SNAPSHOT_LINUX_DEBUG_RENDEZVOUS_H_
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