From b4842d33bb9c8e96bed94ad78ef95f74871972a6 Mon Sep 17 00:00:00 2001 From: Itamar Date: Fri, 6 Nov 2020 10:09:51 +0200 Subject: Kernel: Generate a coredump file when a process crashes When a process crashes, we generate a coredump file and write it in /tmp/coredumps/. The coredump file is an ELF file of type ET_CORE. It contains a segment for every userspace memory region of the process, and an additional PT_NOTE segment that contains the registers state for each thread, and a additional data about memory regions (e.g their name). --- Libraries/LibELF/CoreDump.h | 58 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Libraries/LibELF/CoreDump.h (limited to 'Libraries/LibELF/CoreDump.h') diff --git a/Libraries/LibELF/CoreDump.h b/Libraries/LibELF/CoreDump.h new file mode 100644 index 0000000000..0554809476 --- /dev/null +++ b/Libraries/LibELF/CoreDump.h @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2020, The SerenityOS developers. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#pragma once +#include +#include + +namespace ELF::Core { + +struct [[gnu::packed]] NotesEntry +{ + enum Type : u8 { + Null = 0, // Terminates segment + ThreadInfo, + MemoryRegionInfo, + }; + Type type; + char data[]; +}; + +struct [[gnu::packed]] ThreadInfo +{ + int tid; + PtraceRegisters regs; +}; + +struct [[gnu::packed]] MemoryRegionInfo +{ + uint32_t region_start {}; + uint32_t region_end; + uint16_t program_header_index; + char file_name[]; +}; + +} -- cgit v1.2.3