bolt/test/lsda-section-name.cpp

   1 // This test check that LSDA section named by .gcc_except_table.main is
   2 // disassembled by BOLT.
   3
   4 // RUN: %clang++ %cxxflags -O3 -no-pie -c %s -o %t.o
   5 // RUN: %clang++ %cxxflags -O3 -no-pie -fuse-ld=lld %t.o -o %t
   6 // RUN: llvm-objcopy --rename-section .gcc_except_table=.gcc_except_table.main %t
   7 // RUN: llvm-readelf -SW %t | FileCheck %s
   8 // RUN: llvm-bolt %t -o %t.bolt
   9
  10 // CHECK: .gcc_except_table.main
  11
  12 #include <iostream>
  13
  14 class MyException : public std::exception {
  15 public:
  16   const char *what() const throw() {
  17     return "Custom Exception: an error occurred!";
  18   }
  19 };
  20
  21 int divide(int a, int b) {
  22   if (b == 0) {
  23     throw MyException();
  24   }
  25   return a / b;
  26 }
  27
  28 int main() {
  29   try {
  30     int result = divide(10, 2); // normal case
  31     std::cout << "Result: " << result << std::endl;
  32     result = divide(5, 0); // will cause exception
  33     std::cout << "Result: " << result << std::endl;
  34     // this line will not execute
  35   } catch (const MyException &e) {
  36     // catch custom exception
  37     std::cerr << "Caught exception: " << e.what() << std::endl;
  38   } catch (const std::exception &e) {
  39     // catch other C++ exceptions
  40     std::cerr << "Caught exception: " << e.what() << std::endl;
  41   } catch (...) {
  42     // catch all other exceptions
  43     std::cerr << "Caught unknown exception" << std::endl;
  44   }
  45
  46   return 0;
  47 }