Revert "Add support for fetching signed values from tagged pointers."

This reverts commit 4d9039c.

This is causing the greendragon bots to fail most of the time when
running TestNSDictionarySynthetic.py.  Reverting until Jim has a chance
to look at this on Monday.  Running the commands from that test from
the command line, it fails 10-13% of the time on my desktop.

This is a revert of Jim's changes in https://reviews.llvm.org/D99694

(cherry picked from commit 602ab18)

Author: jasonmolenda

lldb/source/Plugins/Language/ObjC/Cocoa.cpp

@@ -351,7 +351,7 @@ static void NSNumber_FormatInt(ValueObject &valobj, Stream &stream, int value,
 }
 
 static void NSNumber_FormatLong(ValueObject &valobj, Stream &stream,
-                                int64_t value, lldb::LanguageType lang) {
+                                uint64_t value, lldb::LanguageType lang) {
   static ConstString g_TypeHint("NSNumber:long");
 
   std::string prefix, suffix;
@@ -456,15 +456,9 @@ bool lldb_private::formatters::NSNumberSummaryProvider(
     return NSDecimalNumberSummaryProvider(valobj, stream, options);
 
   if (class_name == "NSNumber" || class_name == "__NSCFNumber") {
-    int64_t value = 0;
+    uint64_t value = 0;
     uint64_t i_bits = 0;
-    if (descriptor->GetTaggedPointerInfoSigned(&i_bits, &value)) {
-      // Check for "preserved" numbers.  We still don't support them yet.
-      if (i_bits & 0x8) {
-        lldbassert(!static_cast<bool>("We should handle preserved numbers!"));
-        return false;
-      }
-
+    if (descriptor->GetTaggedPointerInfo(&i_bits, &value)) {
       switch (i_bits) {
       case 0:
         NSNumber_FormatChar(valobj, stream, (char)value, options.GetLanguage());

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.h

@@ -41,12 +41,6 @@ class ClassDescriptorV2 : public ObjCLanguageRuntime::ClassDescriptor {
     return false;
   }
 
-  bool GetTaggedPointerInfoSigned(uint64_t *info_bits = nullptr,
-                                  int64_t *value_bits = nullptr,
-                                  uint64_t *payload = nullptr) override {
-    return false;
-  }
-
   uint64_t GetInstanceSize() override;
 
   ObjCLanguageRuntime::ObjCISA GetISA() override { return m_objc_class_ptr; }
@@ -259,7 +253,7 @@ class ClassDescriptorV2Tagged : public ObjCLanguageRuntime::ClassDescriptor {
 
   ClassDescriptorV2Tagged(
       ObjCLanguageRuntime::ClassDescriptorSP actual_class_sp,
-      uint64_t u_payload, int64_t s_payload) {
+      uint64_t payload) {
     if (!actual_class_sp) {
       m_valid = false;
       return;
@@ -270,10 +264,9 @@ class ClassDescriptorV2Tagged : public ObjCLanguageRuntime::ClassDescriptor {
       return;
     }
     m_valid = true;
-    m_payload = u_payload;
+    m_payload = payload;
     m_info_bits = (m_payload & 0x0FULL);
     m_value_bits = (m_payload & ~0x0FULL) >> 4;
-    m_value_bits_signed = (s_payload & ~0x0FLL) >> 4;
   }
 
   ~ClassDescriptorV2Tagged() override = default;
@@ -315,18 +308,6 @@ class ClassDescriptorV2Tagged : public ObjCLanguageRuntime::ClassDescriptor {
     return true;
   }
 
-  bool GetTaggedPointerInfoSigned(uint64_t *info_bits = nullptr,
-                                  int64_t *value_bits = nullptr,
-                                  uint64_t *payload = nullptr) override {
-    if (info_bits)
-      *info_bits = GetInfoBits();
-    if (value_bits)
-      *value_bits = GetValueBitsSigned();
-    if (payload)
-      *payload = GetPayload();
-    return true;
-  }
-
   uint64_t GetInstanceSize() override {
     return (IsValid() ? m_pointer_size : 0);
   }
@@ -338,10 +319,6 @@ class ClassDescriptorV2Tagged : public ObjCLanguageRuntime::ClassDescriptor {
   // these calls are not part of any formal tagged pointers specification
   virtual uint64_t GetValueBits() { return (IsValid() ? m_value_bits : 0); }
 
-  virtual int64_t GetValueBitsSigned() {
-    return (IsValid() ? m_value_bits_signed : 0);
-  }
-
   virtual uint64_t GetInfoBits() { return (IsValid() ? m_info_bits : 0); }
 
   virtual uint64_t GetPayload() { return (IsValid() ? m_payload : 0); }
@@ -352,7 +329,6 @@ class ClassDescriptorV2Tagged : public ObjCLanguageRuntime::ClassDescriptor {
   bool m_valid;
   uint64_t m_info_bits;
   uint64_t m_value_bits;
-  int64_t m_value_bits_signed;
   uint64_t m_payload;
 };
 

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV1.h

@@ -64,12 +64,6 @@ class AppleObjCRuntimeV1 : public AppleObjCRuntime {
       return false;
     }
 
-    bool GetTaggedPointerInfoSigned(uint64_t *info_bits = nullptr,
-                                    int64_t *value_bits = nullptr,
-                                    uint64_t *payload = nullptr) override {
-      return false;
-    }
-
     uint64_t GetInstanceSize() override { return m_instance_size; }
 
     ObjCISA GetISA() override { return m_isa; }

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp

@@ -2472,6 +2472,7 @@ ObjCLanguageRuntime::ClassDescriptorSP
 AppleObjCRuntimeV2::TaggedPointerVendorRuntimeAssisted::GetClassDescriptor(
     lldb::addr_t ptr) {
   ClassDescriptorSP actual_class_descriptor_sp;
+  uint64_t data_payload;
   uint64_t unobfuscated = (ptr) ^ m_runtime.GetTaggedPointerObfuscator();
 
   if (!IsPossibleTaggedPointer(unobfuscated))
@@ -2499,15 +2500,12 @@ AppleObjCRuntimeV2::TaggedPointerVendorRuntimeAssisted::GetClassDescriptor(
     m_cache[slot] = actual_class_descriptor_sp;
   }
 
-  uint64_t data_payload =
+  data_payload =
       (((uint64_t)unobfuscated << m_objc_debug_taggedpointer_payload_lshift) >>
        m_objc_debug_taggedpointer_payload_rshift);
-  int64_t data_payload_signed =
-      ((int64_t)((int64_t)unobfuscated
-                 << m_objc_debug_taggedpointer_payload_lshift) >>
-       m_objc_debug_taggedpointer_payload_rshift);
-  return ClassDescriptorSP(new ClassDescriptorV2Tagged(
-      actual_class_descriptor_sp, data_payload, data_payload_signed));
+
+  return ClassDescriptorSP(
+      new ClassDescriptorV2Tagged(actual_class_descriptor_sp, data_payload));
 }
 
 AppleObjCRuntimeV2::TaggedPointerVendorExtended::TaggedPointerVendorExtended(
@@ -2559,6 +2557,7 @@ ObjCLanguageRuntime::ClassDescriptorSP
 AppleObjCRuntimeV2::TaggedPointerVendorExtended::GetClassDescriptor(
     lldb::addr_t ptr) {
   ClassDescriptorSP actual_class_descriptor_sp;
+  uint64_t data_payload;
   uint64_t unobfuscated = (ptr) ^ m_runtime.GetTaggedPointerObfuscator();
 
   if (!IsPossibleTaggedPointer(unobfuscated))
@@ -2589,16 +2588,12 @@ AppleObjCRuntimeV2::TaggedPointerVendorExtended::GetClassDescriptor(
     m_ext_cache[slot] = actual_class_descriptor_sp;
   }
 
-  uint64_t data_payload = (((uint64_t)unobfuscated
-                            << m_objc_debug_taggedpointer_ext_payload_lshift) >>
-                           m_objc_debug_taggedpointer_ext_payload_rshift);
-  int64_t data_payload_signed =
-      ((int64_t)((int64_t)unobfuscated
-                 << m_objc_debug_taggedpointer_ext_payload_lshift) >>
-       m_objc_debug_taggedpointer_ext_payload_rshift);
+  data_payload = (((uint64_t)unobfuscated
+                   << m_objc_debug_taggedpointer_ext_payload_lshift) >>
+                  m_objc_debug_taggedpointer_ext_payload_rshift);
 
-  return ClassDescriptorSP(new ClassDescriptorV2Tagged(
-      actual_class_descriptor_sp, data_payload, data_payload_signed));
+  return ClassDescriptorSP(
+      new ClassDescriptorV2Tagged(actual_class_descriptor_sp, data_payload));
 }
 
 AppleObjCRuntimeV2::NonPointerISACache::NonPointerISACache(

lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h

@@ -87,20 +87,10 @@ class ObjCLanguageRuntime : public LanguageRuntime {
 
     virtual bool IsValid() = 0;
 
-    /// There are two routines in the ObjC runtime that tagged pointer clients
-    /// can call to get the value from their tagged pointer, one that retrieves
-    /// it as an unsigned value and one a signed value.  These two
-    /// GetTaggedPointerInfo methods mirror those two ObjC runtime calls.
-    /// @{
     virtual bool GetTaggedPointerInfo(uint64_t *info_bits = nullptr,
                                       uint64_t *value_bits = nullptr,
                                       uint64_t *payload = nullptr) = 0;
 
-    virtual bool GetTaggedPointerInfoSigned(uint64_t *info_bits = nullptr,
-                                            int64_t *value_bits = nullptr,
-                                            uint64_t *payload = nullptr) = 0;
-    /// @}
- 
     virtual uint64_t GetInstanceSize() = 0;
 
     // use to implement version-specific additional constraints on pointers

lldb/test/API/functionalities/data-formatter/data-formatter-objc/TestDataFormatterObjCCF.py

@@ -45,6 +45,7 @@ def test_coreframeworks_and_run_command(self):
             '(Point) point = (v=7, h=12)', '(Point *) point_ptr = (v=7, h=12)',
             '(SEL) foo_selector = "foo_selector_impl"'
         ]
+
         self.expect("frame variable", substrs=expect_strings)
 
         if self.getArchitecture() in ['i386', 'x86_64']:
@@ -55,28 +56,3 @@ def test_coreframeworks_and_run_command(self):
                 '(HIRect) hi_rect = origin=(x = 3, y = 5) size=(width = 4, height = 6)',
             ]
             self.expect("frame variable", substrs=extra_string)
-
-        # The original tests left out testing the NSNumber values, so do that here.
-        # This set is all pointers, with summaries, so we only check the summary.
-        var_list_pointer = [
-            ['NSNumber *', 'num1',    '(int)5'],
-            ['NSNumber *', 'num2',    '(float)3.140000'],
-            ['NSNumber *', 'num3',    '(double)3.14'],
-            ['NSNumber *', 'num4',    '(int128_t)18446744073709551614'],
-            ['NSNumber *', 'num5',    '(char)65'],
-            ['NSNumber *', 'num6',    '(long)255'],
-            ['NSNumber *', 'num7',    '(long)2000000'],
-            ['NSNumber *', 'num8_Y',  'YES'],
-            ['NSNumber *', 'num8_N',  'NO'],
-            ['NSNumber *', 'num9',    '(short)-31616'],
-            ['NSNumber *', 'num_at1', '(int)12'],
-            ['NSNumber *', 'num_at2', '(int)-12'],
-            ['NSNumber *', 'num_at3', '(double)12.5'],
-            ['NSNumber *', 'num_at4', '(double)-12.5'],
-            ['NSDecimalNumber *', 'decimal_number', '123456 x 10^-10'],
-            ['NSDecimalNumber *', 'decimal_number_neg', '-123456 x 10^10']
-        ]
-        for type, var_path, summary in var_list_pointer:
-            self.expect_var_path(var_path, summary, None, type)
-
-