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kern: add debug thread dump

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This commit is contained in:
Michael Scire 2020-12-09 05:59:54 -08:00
parent abd7ad2720
commit bcc7eed037
8 changed files with 158 additions and 8 deletions
libraries/libmesosphere/source
kern_k_thread.cpp

34
libraries/libmesosphere/source/kern_k_thread.cpp
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@ -24,6 +24,15 @@ namespace ams::kern {
return KernelVirtualAddressSpaceBase <= key_uptr && key_uptr <= KernelVirtualAddressSpaceLast;
}
void InitializeKernelStack(uintptr_t stack_top) {
#if defined(MESOSPHERE_ENABLE_KERNEL_STACK_USAGE)
const uintptr_t stack_bottom = stack_top - PageSize;
std::memset(reinterpret_cast<void *>(stack_bottom), 0xCC, PageSize - sizeof(KThread::StackParameters));
#else
MESOSPHERE_UNUSED(stack_top);
#endif
}
void CleanupKernelStack(uintptr_t stack_top) {
const uintptr_t stack_bottom = stack_top - PageSize;
@ -153,6 +162,11 @@ namespace ams::kern {
this->resource_limit_release_hint = 0;
this->cpu_time = 0;
/* Setup our kernel stack. */
if (type != ThreadType_Main) {
InitializeKernelStack(reinterpret_cast<uintptr_t>(kern_stack_top));
}
/* Clear our stack parameters. */
std::memset(static_cast<void *>(std::addressof(this->GetStackParameters())), 0, sizeof(StackParameters));
@ -803,6 +817,26 @@ namespace ams::kern {
KScheduler::OnThreadStateChanged(this, old_state);
}
size_t KThread::GetKernelStackUsage() const {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(this->kernel_stack_top != nullptr);
#if defined(MESOSPHERE_ENABLE_KERNEL_STACK_USAGE)
const u8 *stack = static_cast<const u8 *>(this->kernel_stack_top) - PageSize;
size_t i;
for (i = 0; i < PageSize; ++i) {
if (stack[i] != 0xCC) {
break;
}
}
return PageSize - i;
#else
return 0;
#endif
}
Result KThread::SetActivity(ams::svc::ThreadActivity activity) {
/* Lock ourselves. */
KScopedLightLock lk(this->activity_pause_lock);