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Kernel: Generate a coredump file when a process crashes

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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).
This commit is contained in:
Itamar 2020-11-06 10:09:51 +02:00 • committed by Andreas Kling
parent efe4da57df
commit b4842d33bb
11 changed files with 427 additions and 1 deletions
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3
Kernel/KSyms.cpp
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@ -144,6 +144,9 @@ NEVER_INLINE static void dump_backtrace_impl(FlatPtr base_pointer, bool use_ksym
if (use_ksyms) {
FlatPtr copied_stack_ptr[2];
for (FlatPtr* stack_ptr = (FlatPtr*)base_pointer; stack_ptr && recognized_symbol_count < max_recognized_symbol_count; stack_ptr = (FlatPtr*)copied_stack_ptr[0]) {
if ((FlatPtr)stack_ptr < 0xc0000000)
break;
void* fault_at;
if (!safe_memcpy(copied_stack_ptr, stack_ptr, sizeof(copied_stack_ptr), fault_at))
break;