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Allow processes to go into a BeingInspected state (used by procfs.)

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This ensures that the process won't get scheduled, and so inspecting
it is safe and easy without blocking interrupts.
This commit is contained in:
Andreas Kling 2018-11-01 14:21:02 +01:00
parent dfaa2b6b02
commit 52607aa086
Notes: sideshowbarker 2024-07-19 18:34:47 +09:00
3 changed files with 37 additions and 19 deletions
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17
Kernel/ProcFileSystem.cpp
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@ -27,8 +27,9 @@ ProcFileSystem::~ProcFileSystem()
{
}
ByteBuffer procfs$pid_fds(const Process& process)
ByteBuffer procfs$pid_fds(Process& process)
{
ProcessInspectionScope scope(process);
char* buffer;
auto stringImpl = StringImpl::createUninitialized(process.number_of_open_file_descriptors() * 80, buffer);
memset(buffer, 0, stringImpl->length());
@ -43,9 +44,9 @@ ByteBuffer procfs$pid_fds(const Process& process)
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
}
ByteBuffer procfs$pid_vm(const Process& process)
ByteBuffer procfs$pid_vm(Process& process)
{
InterruptDisabler disabler;
ProcessInspectionScope scope(process);
char* buffer;
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 80 + 80 + process.subregionCount() * 80, buffer);
memset(buffer, 0, stringImpl->length());
@ -76,7 +77,7 @@ ByteBuffer procfs$pid_vm(const Process& process)
ByteBuffer procfs$pid_stack(Process& process)
{
InterruptDisabler disabler;
ProcessInspectionScope scope(process);
OtherProcessPagingScope pagingScope(process);
struct RecognizedSymbol {
dword address;
@ -108,11 +109,8 @@ ByteBuffer procfs$pid_stack(Process& process)
ByteBuffer procfs$pid_exe(Process& process)
{
InodeIdentifier inode;
{
InterruptDisabler disabler;
inode = process.executableInode();
}
ProcessInspectionScope scope(process);
auto inode = process.executableInode();
return VirtualFileSystem::the().absolutePath(inode).toByteBuffer();
}
@ -201,6 +199,7 @@ static const char* toString(Process::State state)
case Process::BlockedSleep: return "Sleep";
case Process::BlockedWait: return "Wait";
case Process::BlockedRead: return "Read";
case Process::BeingInspected: return "Inspect";
}
ASSERT_NOT_REACHED();
return nullptr;