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kernel: Add core dump facility

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* Add function core_dump_write_core_file(). It writes a core file for
  the current thread's team. The file format is similar to that of
  other OSs (i.e. ELF with PT_LOAD segments and a PT_NOTE segment), but
  most of the notes are Haiku specific (infos for team, areas, images,
  threads). More data will probably need to be added.
* Add team flag TEAM_FLAG_DUMP_CORE, thread flag
  THREAD_FLAGS_TRAP_FOR_CORE_DUMP, and Team property coreDumpCondition,
  a condition variable available while a core dump is progress. A
  thread that finds its flag THREAD_FLAGS_TRAP_FOR_CORE_DUMP set before
  exiting the kernel to userland calls core_dump_trap_thread(), which
  blocks on the condition variable until the core dump has finished. We
  need the team's threads to stop so we can get their CPU state (and
  have a generally unchanging team state while writing the core file).
* Add user debugger message B_DEBUG_WRITE_CORE_FILE. It causes
  core_dump_write_core_file() to be called for the team.
* Dumping core as an immediate effect of a terminal signal has not been
  implemented yet, but that should be fairly straight forward.
This commit is contained in:
Ingo Weinhold
2016-04-24 18:22:14 +02:00
parent ac1f1a926e
commit 467fe4ca0c
13 changed files with 1698 additions and 29 deletions
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headers/private/system/elf_private.h
+6 -1
View File
@@ -1,5 +1,5 @@
/*
* Copyright 2002-2015 Haiku, Inc. All rights reserved.
* Copyright 2002-2016 Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*
* Copyright 2001 Travis Geiselbrecht. All rights reserved.
@@ -37,6 +37,11 @@ DEFINE_ELF_TYPE(Verdef, elf_verdef);
DEFINE_ELF_TYPE(Verdaux, elf_verdaux);
DEFINE_ELF_TYPE(Verneed, elf_verneed);
DEFINE_ELF_TYPE(Vernaux, elf_vernaux);
DEFINE_ELF_TYPE(Nhdr, elf_nhdr);
DEFINE_ELF_TYPE(Note_Team, elf_note_team);
DEFINE_ELF_TYPE(Note_Area_Entry, elf_note_area_entry);
DEFINE_ELF_TYPE(Note_Image_Entry, elf_note_image_entry);
DEFINE_ELF_TYPE(Note_Thread_Entry, elf_note_thread_entry);
#undef DEFINE_ELF_TYPE
#undef _ELF_TYPE