lldb/test/Shell/Expr/TestClangModulesDeclLookup.test

# XFAIL: target-windows
# XFAIL: system-linux
# XFAIL: system-windows && remote-linux

# Test that we can successfully locate decls in Clang modules for C++.

# RUN: split-file %s %t
# RUN: %clang_host -g -gdwarf %t/main.cpp -fmodules -fcxx-modules -o %t.out
# RUN: %lldb -o "settings set interpreter.stop-command-source-on-error false" \
# RUN:       -x -b -s %t/commands.input %t.out 2>&1 \
# RUN:       | FileCheck %s

#--- main.cpp

#include "Module.h"

int main() {
  foo(10);
  return 0;
}

#--- module.modulemap

module Module {
  header "Module.h"
  export *
}

#--- Module.h

// We use nodebug here ensures that LLDB tries to pick the decl out of the module.
// If debug-info is available, it would use that to construct the decl instead.
[[gnu::nodebug]] int foo(int x) { return x; }

int bar(int x, int y) { return x + y; }

#--- commands.input

breakpoint set -n foo
run

expression foo(5)

# FIXME: when we're stopped in a frame without debug-info, the ClangModulesDeclVendor
# is initialized properly and none of the modules in the CU are compiled (and lookup
# in the DeclVendor is not enabled).
# CHECK: expression foo(5)
# CHECK: error: 'foo' has unknown return type; cast the call to its declared return type

breakpoint set -p return -X main
continue
expression foo(50)

# However, once we're back in a frame with debug-info, the ClangModulesDeclVendor infrastructure
# is back on track.

# CHECK:      expression foo(50)
# CHECK-NEXT: (int) $0 = 5

target modules dump ast --filter foo
# CHECK:     (lldb) target modules dump ast --filter foo
# CHECK-NOT: foo