[lldb][libc++] Adds chrono data formatters.

This adds the data formatters for chrono duration typedefs.

Reviewed By: Michael137

Differential Revision: https://reviews.llvm.org/D159127

Author: mordante

lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp

@@ -979,6 +979,57 @@ static void LoadLibCxxFormatters(lldb::TypeCategoryImplSP cpp_category_sp) {
                   "std::unordered_map iterator synthetic children",
                   "^std::__[[:alnum:]]+::__hash_map_(const_)?iterator<.+>$",
                   stl_synth_flags, true);
+  // Chrono duration typedefs
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::nanoseconds", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} ns")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::microseconds", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} µs")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::milliseconds", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} ms")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::seconds", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} s")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::minutes", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(eTypeOptionHideChildren |
+                                                    eTypeOptionHideValue,
+                                                "${var.__rep_} min")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::hours", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} h")));
+
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::days", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(eTypeOptionHideChildren |
+                                                    eTypeOptionHideValue,
+                                                "${var.__rep_} days")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::weeks", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(eTypeOptionHideChildren |
+                                                    eTypeOptionHideValue,
+                                                "${var.__rep_} weeks")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::months", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(eTypeOptionHideChildren |
+                                                    eTypeOptionHideValue,
+                                                "${var.__rep_} months")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::years", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(eTypeOptionHideChildren |
+                                                    eTypeOptionHideValue,
+                                                "${var.__rep_} years")));
+  cpp_category_sp->AddTypeSummary(
+      "^std::__[[:alnum:]]+::chrono::seconds", eFormatterMatchRegex,
+      TypeSummaryImplSP(new StringSummaryFormat(
+          eTypeOptionHideChildren | eTypeOptionHideValue, "${var.__rep_} s")));
 }
 
 static void LoadLibStdcppFormatters(lldb::TypeCategoryImplSP cpp_category_sp) {

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/chrono/Makefile

@@ -0,0 +1,6 @@
+CXX_SOURCES := main.cpp
+
+USE_LIBCPP := 1
+
+CXXFLAGS_EXTRAS := -std=c++20
+include Makefile.rules

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/chrono/TestDataFormatterLibcxxChrono.py

@@ -0,0 +1,33 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LibcxxChronoDataFormatterTestCase(TestBase):
+    @add_test_categories(["libc++"])
+    def test_with_run_command(self):
+        """Test that that file and class static variables display correctly."""
+        self.build()
+        (self.target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
+            self, "break here", lldb.SBFileSpec("main.cpp", False)
+        )
+
+        lldbutil.continue_to_breakpoint(process, bkpt)
+        self.expect("frame variable ns", substrs=["ns = 1 ns"])
+        self.expect("frame variable us", substrs=["us = 12 µs"])
+        self.expect("frame variable ms", substrs=["ms = 123 ms"])
+        self.expect("frame variable s", substrs=["s = 1234 s"])
+        self.expect("frame variable min", substrs=["min = 12345 min"])
+        self.expect("frame variable h", substrs=["h = 123456 h"])
+
+        self.expect("frame variable d", substrs=["d = 654321 days"])
+        self.expect("frame variable w", substrs=["w = 54321 weeks"])
+        self.expect("frame variable m", substrs=["m = 4321 months"])
+        self.expect("frame variable y", substrs=["y = 321 years"])
+

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/chrono/main.cpp

@@ -0,0 +1,19 @@
+#include <chrono>
+#include <iostream>
+
+int main() {
+  // break here
+  std::chrono::nanoseconds ns{1};
+  std::chrono::microseconds us{12};
+  std::chrono::milliseconds ms{123};
+  std::chrono::seconds s{1234};
+  std::chrono::minutes min{12345};
+  std::chrono::hours h{123456};
+
+  std::chrono::days d{654321};
+  std::chrono::weeks w{54321};
+  std::chrono::months m{4321};
+  std::chrono::years y{321};
+
+  std::cout << "break here\n";
+}