[debugserver] Clear memory allocations after exec

After an exec, the inferior is a new process and none of these memory
regions are still allocated. Clear them out.

Differential Revision: https://reviews.llvm.org/D140253

3 files changed, 9 insertions, 0 deletions

diff --git a/lldb/tools/debugserver/source/MacOSX/MachProcess.mm b/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
index 3aa2a84bc359..d524a49defb9 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
+++ b/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
@@ -2285,6 +2285,7 @@ task_t MachProcess::ExceptionMessageBundleComplete() {
         m_thread_list.Clear();
         m_activities.Clear();
         m_breakpoints.DisableAll();
+        m_task.ClearAllocations();
       }
 
       if (m_sent_interrupt_signo != 0) {
diff --git a/lldb/tools/debugserver/source/MacOSX/MachTask.h b/lldb/tools/debugserver/source/MacOSX/MachTask.h
index a58d5bed3b06..286a57b9e0dd 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachTask.h
+++ b/lldb/tools/debugserver/source/MacOSX/MachTask.h
@@ -61,6 +61,7 @@ public:
 
   nub_addr_t AllocateMemory(nub_size_t size, uint32_t permissions);
   nub_bool_t DeallocateMemory(nub_addr_t addr);
+  void ClearAllocations();
 
   mach_port_t ExceptionPort() const;
   bool ExceptionPortIsValid() const;
diff --git a/lldb/tools/debugserver/source/MacOSX/MachTask.mm b/lldb/tools/debugserver/source/MacOSX/MachTask.mm
index 1e03faf3f2e2..feec85df9ef1 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachTask.mm
+++ b/lldb/tools/debugserver/source/MacOSX/MachTask.mm
@@ -999,6 +999,13 @@ nub_bool_t MachTask::DeallocateMemory(nub_addr_t addr) {
   return false;
 }
 
+//----------------------------------------------------------------------
+// MachTask::ClearAllocations
+//----------------------------------------------------------------------
+void MachTask::ClearAllocations() {
+  m_allocations.clear();
+}
+
 void MachTask::TaskPortChanged(task_t task)
 {
   m_task = task;