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0bb7c8f4c4
Instead, allow userspace to decide on the coredump directory path. By default, SystemServer sets it to the /tmp/coredump directory, but users can now change this by writing a new path to the sysfs node at /sys/kernel/variables/coredump_directory, and also to read this node to check where coredumps are currently generated at.
88 lines
3 KiB
C++
88 lines
3 KiB
C++
/*
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* Copyright (c) 2019-2020, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/Vector.h>
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#include <Kernel/Forward.h>
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#include <Kernel/Library/NonnullLockRefPtr.h>
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#include <Kernel/Locking/SpinlockProtected.h>
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#include <Kernel/Memory/Region.h>
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namespace Kernel {
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class Coredump {
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public:
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static ErrorOr<NonnullOwnPtr<Coredump>> try_create(NonnullLockRefPtr<Process>, StringView output_path);
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static SpinlockProtected<OwnPtr<KString>>& directory_path();
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~Coredump() = default;
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ErrorOr<void> write();
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private:
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class FlatRegionData {
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public:
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explicit FlatRegionData(Memory::Region const& region, NonnullOwnPtr<KString> name)
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: m_access(region.access())
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, m_is_executable(region.is_executable())
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, m_is_kernel(region.is_kernel())
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, m_is_readable(region.is_readable())
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, m_is_writable(region.is_writable())
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, m_name(move(name))
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, m_page_count(region.page_count())
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, m_size(region.size())
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, m_vaddr(region.vaddr())
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{
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}
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auto access() const { return m_access; }
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auto name() const { return m_name->view(); }
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auto is_executable() const { return m_is_executable; }
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auto is_kernel() const { return m_is_kernel; }
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auto is_readable() const { return m_is_readable; }
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auto is_writable() const { return m_is_writable; }
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auto page_count() const { return m_page_count; }
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auto size() const { return m_size; }
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auto vaddr() const { return m_vaddr; }
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bool looks_like_userspace_heap_region() const;
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bool is_consistent_with_region(Memory::Region const& region) const;
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private:
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Memory::Region::Access m_access;
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bool m_is_executable;
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bool m_is_kernel;
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bool m_is_readable;
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bool m_is_writable;
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NonnullOwnPtr<KString> m_name;
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size_t m_page_count;
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size_t m_size;
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VirtualAddress m_vaddr;
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};
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Coredump(NonnullLockRefPtr<Process>, NonnullLockRefPtr<OpenFileDescription>, Vector<FlatRegionData>);
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static ErrorOr<NonnullLockRefPtr<OpenFileDescription>> try_create_target_file(Process const&, StringView output_path);
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ErrorOr<void> write_elf_header();
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ErrorOr<void> write_program_headers(size_t notes_size);
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ErrorOr<void> write_regions();
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ErrorOr<void> write_notes_segment(ReadonlyBytes);
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ErrorOr<void> create_notes_segment_data(auto&) const;
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ErrorOr<void> create_notes_process_data(auto&) const;
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ErrorOr<void> create_notes_threads_data(auto&) const;
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ErrorOr<void> create_notes_regions_data(auto&) const;
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ErrorOr<void> create_notes_metadata_data(auto&) const;
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NonnullLockRefPtr<Process> m_process;
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NonnullLockRefPtr<OpenFileDescription> m_description;
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size_t m_num_program_headers { 0 };
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Vector<FlatRegionData> m_regions;
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};
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}
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