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Report original thread ID for FreeBSD core files 

On FreeBSD the tid is (somewhat unintuitively) found in the pr_pid
field of the NT_PRSTATUS note. Collect it when parsing the note and
store it in the thread data.

For Linux I've left the original behaviour of using sequential TIDs
(0, 1, 2...) as I don't yet have code to obtain it.

Differential Revision:	http://reviews.llvm.org/D11652

llvm-svn: 243748
This commit is contained in:
Ed Maste 2015-07-31 14:24:32 +00:00
parent b4fbb173f0
commit 343ad62374
3 changed files with 8 additions and 7 deletions
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6
lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp
View File

@ -258,7 +258,7 @@ ProcessElfCore::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_t
for (lldb::tid_t tid = 0; tid < num_threads; ++tid)
{
const ThreadData &td = m_thread_data[tid];
lldb::ThreadSP thread_sp(new ThreadElfCore (*this, tid, td));
lldb::ThreadSP thread_sp(new ThreadElfCore (*this, td));
new_thread_list.AddThread (thread_sp);
}
return new_thread_list.GetSize(false) > 0;
@ -429,7 +429,7 @@ ParseFreeBSDPrStatus(ThreadData &thread_data, DataExtractor &data,
offset += 16;
thread_data.signo = data.GetU32(&offset); // pr_cursig
offset += 4; // pr_pid
thread_data.tid = data.GetU32(&offset); // pr_pid
if (lp64)
offset += 4;
@ -543,6 +543,8 @@ ProcessElfCore::ParseThreadContextsFromNoteSegment(const elf::ELFProgramHeader *
header_size = ELFLinuxPrStatus::GetSize(arch);
len = note_data.GetByteSize() - header_size;
thread_data->gpregset = DataExtractor(note_data, header_size, len);
// FIXME: Obtain actual tid on Linux
thread_data->tid = m_thread_data.size();
break;
case NT_FPREGSET:
thread_data->fpregset = note_data;

5
lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
View File

@ -37,9 +37,8 @@ using namespace lldb_private;
//----------------------------------------------------------------------
// Construct a Thread object with given data
//----------------------------------------------------------------------
ThreadElfCore::ThreadElfCore (Process &process, tid_t tid,
const ThreadData &td) :
Thread(process, tid),
ThreadElfCore::ThreadElfCore (Process &process, const ThreadData &td) :
Thread(process, td.tid),
m_thread_name(td.name),
m_thread_reg_ctx_sp (),
m_signo(td.signo),

4
lldb/source/Plugins/Process/elf-core/ThreadElfCore.h
View File

@ -112,6 +112,7 @@ struct ThreadData
lldb_private::DataExtractor gpregset;
lldb_private::DataExtractor fpregset;
lldb_private::DataExtractor vregset;
lldb::tid_t tid;
int signo;
std::string name;
};
@ -119,8 +120,7 @@ struct ThreadData
class ThreadElfCore : public lldb_private::Thread
{
public:
ThreadElfCore (lldb_private::Process &process, lldb::tid_t tid,
const ThreadData &td);
ThreadElfCore (lldb_private::Process &process, const ThreadData &td);
virtual
~ThreadElfCore ();