[Lldb-commits] [lldb] e4a7780 - Revert "[lldb/DWARF] Fix evaluator crash when accessing empty stack."

[Med Ismail Bennani via lldb-commits]

Author: Med Ismail Bennani
Date: 2020-03-31T17:44:17+02:00
New Revision: e4a778052e98c6d67f601342a7ca3b3c52ce7fbd

URL: https://github.com/llvm/llvm-project/commit/e4a778052e98c6d67f601342a7ca3b3c52ce7fbd
DIFF: https://github.com/llvm/llvm-project/commit/e4a778052e98c6d67f601342a7ca3b3c52ce7fbd.diff

LOG: Revert "[lldb/DWARF] Fix evaluator crash when accessing empty stack."

This reverts commit e26eece1e2e7d7e6fbadb1207afef9b6353b5330.

Added: 
    

Modified: 
    lldb/source/Expression/DWARFExpression.cpp
    lldb/unittests/Expression/DWARFExpressionTest.cpp

Removed: 
    


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diff  --git a/lldb/source/Expression/DWARFExpression.cpp b/lldb/source/Expression/DWARFExpression.cpp
index 04fbfccd0c2e..7f12d06450c6 100644
--- a/lldb/source/Expression/DWARFExpression.cpp
+++ b/lldb/source/Expression/DWARFExpression.cpp
@@ -2318,12 +2318,6 @@ bool DWARFExpression::Evaluate(
     // rather is a constant value.  The value from the top of the stack is the
     // value to be used.  This is the actual object value and not the location.
     case DW_OP_stack_value:
-      if (stack.empty()) {
-        if (error_ptr)
-          error_ptr->SetErrorString(
-              "Expression stack needs at least 1 item for DW_OP_stack_value.");
-        return false;
-      }
       stack.back().SetValueType(Value::eValueTypeScalar);
       break;
 

diff  --git a/lldb/unittests/Expression/DWARFExpressionTest.cpp b/lldb/unittests/Expression/DWARFExpressionTest.cpp
index 4c4281983078..64755a9066de 100644
--- a/lldb/unittests/Expression/DWARFExpressionTest.cpp
+++ b/lldb/unittests/Expression/DWARFExpressionTest.cpp
@@ -234,10 +234,6 @@ TEST(DWARFExpression, DW_OP_convert) {
       llvm::Failed());
 }
 
-TEST(DWARFExpression, DW_OP_stack_value) {
-  EXPECT_THAT_EXPECTED(Evaluate({DW_OP_stack_value}), llvm::Failed());
-}
-
 TEST(DWARFExpression, DW_OP_piece) {
   EXPECT_THAT_EXPECTED(Evaluate({DW_OP_const2u, 0x11, 0x22, DW_OP_piece, 2,
                                  DW_OP_const2u, 0x33, 0x44, DW_OP_piece, 2}),