Basic infrastructure code to exploit malloc stack logging as available on Mac OS X to track the allocation history of pointers on the target process

llvm-svn: 139337

1 files changed, 38 insertions, 0 deletions

diff --git a/lldb/tools/debugserver/source/MacOSX/MachTask.h b/lldb/tools/debugserver/source/MacOSX/MachTask.h
index a907e94d344..0e74086a727 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachTask.h
+++ b/lldb/tools/debugserver/source/MacOSX/MachTask.h
@@ -31,6 +31,23 @@
 
 class MachProcess;
 
+typedef uint64_t MachMallocEventId;
+
+enum MachMallocEventType
+{
+    eMachMallocEventTypeAlloc = 2,
+    eMachMallocEventTypeDealloc = 4,
+    eMachMallocEventTypeOther = 1
+};
+
+struct MachMallocEvent
+{
+    mach_vm_address_t m_base_address;
+    uint64_t m_size;
+    MachMallocEventType m_event_type;
+    MachMallocEventId m_event_id;
+};
+
 class MachTask
 {
 public:
@@ -70,6 +87,27 @@ public:
 
             MachProcess *   Process () { return m_process; }
     const   MachProcess *   Process () const { return m_process; }
+    
+    
+            bool            HasMallocLoggingEnabled ();
+
+            // enumerate the malloc records for a given address (starting with Mac OS X 10.6 Snow Leopard it should include
+            // all allocations that *include* address, rather than just those *starting* at address)
+            bool            EnumerateMallocRecords (mach_vm_address_t address,
+                                                    MachMallocEvent *event_buffer,
+                                                    uint32_t buffer_size,
+                                                    uint32_t *count);
+    
+            // enumerate every malloc record generated by this task, no matter what the address
+            bool            EnumerateMallocRecords (MachMallocEvent *event_buffer,
+                                                    uint32_t buffer_size,
+                                                    uint32_t *count);
+        
+            // given a malloc event, report every stack frame that led to this event
+            bool            EnumerateMallocFrames (MachMallocEventId event_id,
+                                                   mach_vm_address_t *function_addresses_buffer,
+                                                   uint32_t buffer_size,
+                                                   uint32_t *count);
 
 protected:
             MachProcess *   m_process;                  // The mach process that owns this MachTask