Add watchpoint support for Linux on 64-bit host.
llvm-svn: 181341
diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
index 35c365f..f010568 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
@@ -14,6 +14,7 @@
// C++ Includes
// Other libraries and framework includes
+#include "lldb/Breakpoint/Watchpoint.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/State.h"
@@ -364,6 +365,7 @@
case ProcessMessage::eTraceMessage:
case ProcessMessage::eBreakpointMessage:
+ case ProcessMessage::eWatchpointMessage:
SetPrivateState(eStateStopped);
break;
@@ -546,6 +548,132 @@
return DisableSoftwareBreakpoint(bp_site);
}
+Error
+ProcessPOSIX::EnableWatchpoint(Watchpoint *wp, bool notify)
+{
+ Error error;
+ if (wp)
+ {
+ user_id_t watchID = wp->GetID();
+ addr_t addr = wp->GetLoadAddress();
+ Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS));
+ if (log)
+ log->Printf ("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64 ")",
+ watchID);
+ if (wp->IsEnabled())
+ {
+ if (log)
+ log->Printf("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64
+ ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.",
+ watchID, (uint64_t)addr);
+ return error;
+ }
+
+ bool wp_enabled = true;
+ uint32_t thread_count = m_thread_list.GetSize(false);
+ for (uint32_t i = 0; i < thread_count; ++i)
+ {
+ POSIXThread *thread = static_cast<POSIXThread*>(
+ m_thread_list.GetThreadAtIndex(i, false).get());
+ if (thread)
+ wp_enabled &= thread->EnableHardwareWatchpoint(wp);
+ else
+ {
+ wp_enabled = false;
+ break;
+ }
+ }
+ if (wp_enabled)
+ {
+ wp->SetEnabled(true, notify);
+ return error;
+ }
+ else
+ {
+ // Watchpoint enabling failed on at least one
+ // of the threads so roll back all of them
+ DisableWatchpoint(wp, false);
+ error.SetErrorString("Setting hardware watchpoint failed");
+ }
+ }
+ else
+ error.SetErrorString("Watchpoint argument was NULL.");
+ return error;
+}
+
+Error
+ProcessPOSIX::DisableWatchpoint(Watchpoint *wp, bool notify)
+{
+ Error error;
+ if (wp)
+ {
+ user_id_t watchID = wp->GetID();
+ addr_t addr = wp->GetLoadAddress();
+ Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS));
+ if (log)
+ log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64 ")",
+ watchID);
+ if (!wp->IsEnabled())
+ {
+ if (log)
+ log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64
+ ") addr = 0x%8.8" PRIx64 ": watchpoint already disabled.",
+ watchID, (uint64_t)addr);
+ // This is needed (for now) to keep watchpoints disabled correctly
+ wp->SetEnabled(false, notify);
+ return error;
+ }
+
+ if (wp->IsHardware())
+ {
+ bool wp_disabled = true;
+ uint32_t thread_count = m_thread_list.GetSize(false);
+ for (uint32_t i = 0; i < thread_count; ++i)
+ {
+ POSIXThread *thread = static_cast<POSIXThread*>(
+ m_thread_list.GetThreadAtIndex(i, false).get());
+ if (thread)
+ wp_disabled &= thread->DisableHardwareWatchpoint(wp);
+ else
+ wp_disabled = false;
+ }
+ if (wp_disabled)
+ {
+ wp->SetEnabled(false, notify);
+ return error;
+ }
+ else
+ error.SetErrorString("Disabling hardware watchpoint failed");
+ }
+ }
+ else
+ error.SetErrorString("Watchpoint argument was NULL.");
+ return error;
+}
+
+Error
+ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num)
+{
+ Error error;
+ POSIXThread *thread = static_cast<POSIXThread*>(
+ m_thread_list.GetThreadAtIndex(0, false).get());
+ if (thread)
+ num = thread->NumSupportedHardwareWatchpoints();
+ else
+ error.SetErrorString("Process does not exist.");
+ return error;
+}
+
+Error
+ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num, bool &after)
+{
+ Error error = GetWatchpointSupportInfo(num);
+ // Watchpoints trigger and halt the inferior after
+ // the corresponding instruction has been executed.
+ after = true;
+ return error;
+}
+
uint32_t
ProcessPOSIX::UpdateThreadListIfNeeded()
{