Add an internal wrapper for `abi::__cxa_demangle()`.

PiperOrigin-RevId: 568652465
Change-Id: I9f72a11cb514eaf694dae589a19dc139891e7af2

1 files changed, 22 insertions, 0 deletions

diff --git a/absl/debugging/internal/demangle_test.cc b/absl/debugging/internal/demangle_test.cc
index faec72b5..26ed9cee 100644
--- a/absl/debugging/internal/demangle_test.cc
+++ b/absl/debugging/internal/demangle_test.cc
@@ -17,6 +17,7 @@
 #include <cstdlib>
 #include <string>
 
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/base/config.h"
 #include "absl/debugging/internal/stack_consumption.h"
@@ -28,6 +29,8 @@ ABSL_NAMESPACE_BEGIN
 namespace debugging_internal {
 namespace {
 
+using ::testing::ContainsRegex;
+
 // A wrapper function for Demangle() to make the unit test simple.
 static const char *DemangleIt(const char * const mangled) {
   static char demangled[4096];
@@ -237,6 +240,25 @@ TEST(DemangleRegression, DeeplyNestedArrayType) {
   TestOnInput(data.c_str());
 }
 
+struct Base {
+  virtual ~Base() = default;
+};
+
+struct Derived : public Base {};
+
+TEST(DemangleStringTest, SupportsSymbolNameReturnedByTypeId) {
+  EXPECT_EQ(DemangleString(typeid(int).name()), "int");
+  // We want to test that `DemangleString` can demangle the symbol names
+  // returned by `typeid`, but without hard-coding the actual demangled values
+  // (because they are platform-specific).
+  EXPECT_THAT(
+      DemangleString(typeid(Base).name()),
+      ContainsRegex("absl.*debugging_internal.*anonymous namespace.*::Base"));
+  EXPECT_THAT(DemangleString(typeid(Derived).name()),
+              ContainsRegex(
+                  "absl.*debugging_internal.*anonymous namespace.*::Derived"));
+}
+
 }  // namespace
 }  // namespace debugging_internal
 ABSL_NAMESPACE_END