labath updated this revision to Diff 424131.
labath added a comment.
Herald added a subscriber: JDevlieghere.
remove the stray binary
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D124155/new/
https://reviews.llvm.org/D124155
Files:
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/Makefile
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/TestDataFormatterLibcxxStringSimulator.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/main.cpp
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/main.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/main.cpp
@@ -0,0 +1,217 @@
+#include <climits>
+#include <memory>
+#include <type_traits>
+
+namespace std {
+namespace __lldb {
+
+template <class _Tp, int _Idx,
+ bool _CanBeEmptyBase =
+ std::is_empty<_Tp>::value && !std::is_final<_Tp>::value>
+struct __compressed_pair_elem {
+ explicit __compressed_pair_elem(_Tp __t) : __value_(__t) {}
+
+ _Tp &__get() { return __value_; }
+
+private:
+ _Tp __value_;
+};
+
+template <class _Tp, int _Idx>
+struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp {
+ explicit __compressed_pair_elem(_Tp __t) : _Tp(__t) {}
+
+ _Tp &__get() { return *this; }
+};
+
+template <class _T1, class _T2>
+class __compressed_pair : private __compressed_pair_elem<_T1, 0>,
+ private __compressed_pair_elem<_T2, 1> {
+public:
+ using _Base1 = __compressed_pair_elem<_T1, 0>;
+ using _Base2 = __compressed_pair_elem<_T2, 1>;
+
+ explicit __compressed_pair(_T1 __t1, _T2 __t2) : _Base1(__t1), _Base2(__t2) {}
+
+ _T1 &first() { return static_cast<_Base1 &>(*this).__get(); }
+};
+
+#if defined(ALTERNATE_LAYOUT) && defined(SUBCLASS_PADDING)
+template <class _CharT, size_t = sizeof(_CharT)> struct __padding {
+ unsigned char __xx[sizeof(_CharT) - 1];
+};
+
+template <class _CharT> struct __padding<_CharT, 1> {};
+#endif
+
+template <class _CharT, class _Traits, class _Allocator> class basic_string {
+public:
+ typedef _CharT value_type;
+ typedef _Allocator allocator_type;
+ typedef allocator_traits<allocator_type> __alloc_traits;
+ typedef typename __alloc_traits::size_type size_type;
+ typedef typename __alloc_traits::pointer pointer;
+
+#ifdef ALTERNATE_LAYOUT
+
+ struct __long {
+ pointer __data_;
+ size_type __size_;
+#ifdef BITMASKS
+ size_type __cap_;
+#else
+ size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1;
+ size_type __is_long_ : 1;
+#endif
+ };
+
+ enum {
+ __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2
+ ? (sizeof(__long) - 1) / sizeof(value_type)
+ : 2
+ };
+
+ struct __short {
+ value_type __data_[__min_cap];
+#ifdef BITMASKS
+#ifdef SUBCLASS_PADDING
+ struct : __padding<value_type> {
+ unsigned char __size_;
+ };
+#else
+ unsigned char __padding[sizeof(value_type) - 1];
+ unsigned char __size_;
+#endif
+#else // !BITMASKS
+ unsigned char __size_ : 7;
+ unsigned char __is_long_ : 1;
+#endif
+ };
+
+#ifdef BITMASKS
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ static const size_type __short_shift = 1;
+ static const size_type __long_mask = 0x1ul;
+#else
+ static const size_type __short_shift = 0;
+ static const size_type __long_mask = ~(size_type(~0) >> 1);
+#endif
+#else // !BITMASKS
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ static const size_type __endian_factor = 2;
+#else
+ static const size_type __endian_factor = 1;
+#endif
+#endif // BITMASKS
+
+#else // !ALTERNATE_LAYOUT
+
+ struct __long {
+#ifdef BITMASKS
+ size_type __cap_;
+#else
+ size_type __is_long_ : 1;
+ size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1;
+#endif
+ size_type __size_;
+ pointer __data_;
+ };
+
+ enum {
+ __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2
+ ? (sizeof(__long) - 1) / sizeof(value_type)
+ : 2
+ };
+
+ struct __short {
+ union {
+#ifdef BITMASKS
+ unsigned char __size_;
+#else
+ struct {
+ unsigned char __is_long_ : 1;
+ unsigned char __size_ : 7;
+ };
+#endif
+ value_type __lx;
+ };
+ value_type __data_[__min_cap];
+ };
+
+#ifdef BITMASKS
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ static const size_type __short_shift = 0;
+ static const size_type __long_mask = ~(size_type(~0) >> 1);
+#else
+ static const size_type __short_shift = 1;
+ static const size_type __long_mask = 0x1ul;
+#endif
+#else // !BITMASKS
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+ static const size_type __endian_factor = 1;
+#else
+ static const size_type __endian_factor = 2;
+#endif
+#endif
+
+#endif // ALTERNATE_LAYOUT
+
+ union __ulx {
+ __long __lx;
+ __short __lxx;
+ };
+
+ enum { __n_words = sizeof(__ulx) / sizeof(size_type) };
+
+ struct __raw {
+ size_type __words[__n_words];
+ };
+
+ struct __rep {
+ union {
+ __long __l;
+ __short __s;
+ __raw __r;
+ };
+ };
+
+ __compressed_pair<__rep, allocator_type> __r_;
+
+public:
+ template <size_t __N>
+ basic_string(unsigned char __size, const value_type (&__data)[__N])
+ : __r_({}, {}) {
+ static_assert(__N < __min_cap, "");
+#ifdef BITMASKS
+ __r_.first().__s.__size_ = __size << __short_shift;
+#else
+ __r_.first().__s.__size_ = __size;
+ __r_.first().__s.__is_long_ = false;
+#endif
+ for (size_t __i = 0; __i < __N; ++__i)
+ __r_.first().__s.__data_[__i] = __data[__i];
+ }
+ basic_string(size_t __cap, size_type __size, pointer __data) : __r_({}, {}) {
+#ifdef BITMASKS
+ __r_.first().__l.__cap_ = __cap | __long_mask;
+#else
+ __r_.first().__l.__cap_ = __cap / __endian_factor;
+ __r_.first().__l.__is_long_ = true;
+#endif
+ __r_.first().__l.__size_ = __size;
+ __r_.first().__l.__data_ = __data;
+ }
+};
+
+using string = basic_string<char, std::char_traits<char>, std::allocator<char>>;
+
+} // namespace __lldb
+} // namespace std
+
+int main() {
+ char longdata[] = "I am a very long string";
+ std::__lldb::string longstring(sizeof(longdata), sizeof(longdata) - 1,
+ longdata);
+ std::__lldb::string shortstring(5, "short");
+ return 0; // Break here
+}
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/TestDataFormatterLibcxxStringSimulator.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/TestDataFormatterLibcxxStringSimulator.py
@@ -0,0 +1,45 @@
+"""
+Test we can understand various layouts of the libc++'s std::string
+"""
+
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LibcxxStringDataFormatterSimulatorTestCase(TestBase):
+
+ mydir = TestBase.compute_mydir(__file__)
+ NO_DEBUG_INFO_TESTCASE = True
+
+ def _run_test(self, defines):
+ cxxflags_extras = " ".join(["-D%s" % d for d in defines])
+ self.build(dictionary=dict(CXXFLAGS_EXTRAS=cxxflags_extras))
+ lldbutil.run_to_source_breakpoint(self, '// Break here',
+ lldb.SBFileSpec("main.cpp"))
+ self.expect_var_path("shortstring", summary='"short"')
+ self.expect_var_path("longstring", summary='"I am a very long string"')
+
+ def test_v1_layout(self):
+ """ Current v1 layout. """
+ self._run_test([])
+
+ def test_v2_layout(self):
+ """ Current v2 layout. """
+ self._run_test(["ALTERNATE_LAYOUT"])
+
+ def test_v1_layout_bitmasks(self):
+ """ Pre-D123580 v1 layout. """
+ self._run_test(["BITMASKS"])
+
+ def test_v2_layout_bitmasks(self):
+ """ Pre-D123580 v2 layout. """
+ self._run_test(["ALTERNATE_LAYOUT", "BITMASKS"])
+
+ def test_v2_layout_subclass_padding(self):
+ """ Pre-c3d0205ee771 v2 layout. """
+ self._run_test(["ALTERNATE_LAYOUT", "BITMASKS", "SUBCLASS_PADDING"])
+
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/Makefile
@@ -0,0 +1,3 @@
+CXX_SOURCES := main.cpp
+override CXXFLAGS_EXTRAS += -std=c++14
+include Makefile.rules
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