[Lldb-commits] [PATCH] D22211: Change the /proc//maps to not assert on incorrect input

[Tamas Berghammer via lldb-commits]

tberghammer created this revision.
tberghammer added a reviewer: labath.
tberghammer added a subscriber: lldb-commits.

Change the /proc/<pid>/maps to not assert on incorrect input

If LLDB reads some incorrect input form /proc/<pid>/maps then it
should report an error instead of assert-ing as we don't want to
crash in case of an incorrect maps file.

http://reviews.llvm.org/D22211

Files:
  source/Plugins/Process/Linux/NativeProcessLinux.cpp

Index: source/Plugins/Process/Linux/NativeProcessLinux.cpp
===================================================================
--- source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -1907,31 +1907,28 @@
     const char read_perm_char = line_extractor.GetChar ();
     if (read_perm_char == 'r')
         memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (read_perm_char == '-') && "unexpected /proc/{pid}/maps read 
permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps read permission char");
 
     // Handle write permission.
     const char write_perm_char = line_extractor.GetChar ();
     if (write_perm_char == 'w')
         memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (write_perm_char == '-') && "unexpected /proc/{pid}/maps 
write permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps write permission char");
 
     // Handle execute permission.
     const char exec_perm_char = line_extractor.GetChar ();
     if (exec_perm_char == 'x')
         memory_region_info.SetExecutable 
(MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (exec_perm_char == '-') && "unexpected /proc/{pid}/maps exec 
permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetExecutable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps exec permission char");
 
     return Error ();
 }



Index: source/Plugins/Process/Linux/NativeProcessLinux.cpp
===================================================================
--- source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -1907,31 +1907,28 @@
     const char read_perm_char = line_extractor.GetChar ();
     if (read_perm_char == 'r')
         memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (read_perm_char == '-') && "unexpected /proc/{pid}/maps read permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetReadable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps read permission char");
 
     // Handle write permission.
     const char write_perm_char = line_extractor.GetChar ();
     if (write_perm_char == 'w')
         memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (write_perm_char == '-') && "unexpected /proc/{pid}/maps write permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetWritable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps write permission char");
 
     // Handle execute permission.
     const char exec_perm_char = line_extractor.GetChar ();
     if (exec_perm_char == 'x')
         memory_region_info.SetExecutable (MemoryRegionInfo::OptionalBool::eYes);
-    else
-    {
-        assert ( (exec_perm_char == '-') && "unexpected /proc/{pid}/maps exec permission char" );
+    else if (read_perm_char == '-')
         memory_region_info.SetExecutable (MemoryRegionInfo::OptionalBool::eNo);
-    }
+    else
+        return Error ("unexpected /proc/{pid}/maps exec permission char");
 
     return Error ();
 }

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