1 // Purpose: 2 // This ensures that DW_OP_deref is inserted when necessary, such as when 3 // NRVO of a string object occurs in C++. 4 // 5 // REQUIRES: !asan, compiler-rt, lldb 6 // UNSUPPORTED: system-windows 7 // Zorg configures the ASAN stage2 bots to not build the asan 8 // compiler-rt. Only run this test on non-asanified configurations. 9 // 10 // RUN: %clang -std=gnu++11 -O0 -glldb -fno-exceptions %s -o %t 11 // RUN: %dexter --fail-lt 1.0 -w \ 12 // RUN: --binary %t --debugger 'lldb' -- %s 13 // 14 // RUN: %clang -std=gnu++11 -O1 -glldb -fno-exceptions %s -o %t 15 // RUN: %dexter --fail-lt 1.0 -w \ 16 // RUN: --binary %t --debugger 'lldb' -- %s 17 // 18 // PR34513 19 volatile int sideeffect = 0; stop()20void __attribute__((noinline)) stop() { sideeffect++; } 21 22 struct string { stringstring23 string() {} stringstring24 string(int i) : i(i) {} ~stringstring25 ~string() {} 26 int i = 0; 27 }; get_string()28string __attribute__((noinline)) get_string() { 29 string unused; 30 string output = 3; 31 stop(); // DexLabel('string-nrvo') 32 return output; 33 } some_function(int)34void some_function(int) {} 35 struct string2 { 36 string2() = default; string2string237 string2(string2 &&other) { i = other.i; } 38 int i; 39 }; get_string2()40string2 __attribute__((noinline)) get_string2() { 41 string2 output; 42 output.i = 5; 43 some_function(output.i); 44 // Test that the debugger can get the value of output after another 45 // function is called. 46 stop(); // DexLabel('string2-nrvo') 47 return output; 48 } main()49int main() { 50 get_string(); 51 get_string2(); 52 } 53 54 // DexExpectWatchValue('output.i', 3, on_line=ref('string-nrvo')) 55 // DexExpectWatchValue('output.i', 5, on_line=ref('string2-nrvo')) 56 57