From 336ce497fb266268a79544f00dd3bbd24cf3a4d6 Mon Sep 17 00:00:00 2001 From: Lewis Hyatt Date: Sat, 14 Jan 2023 13:29:22 -0500 Subject: libcpp: Fix ICE on directive inside _Pragma() operator [PR67046] get__Pragma_string() in directives.cc is responsible for lexing the parens and the string argument from a _Pragma("...") operator. This function does not handle the case when the closing paren is not on the same line as the string; in that case, libcpp will by default reuse the token buffer it previously used for the string, so that the string token returned by get__Pragma_string() may be corrupted, as shown in the testcase. Fix using the existing keep_tokens mechanism that temporarily disables the reuse of token buffers. libcpp/ChangeLog: PR preprocessor/67046 * directives.cc (_cpp_do__Pragma): Increment pfile->keep_tokens to ensure the returned string token is valid. gcc/testsuite/ChangeLog: PR preprocessor/67046 * c-c++-common/cpp/pr67046.c: New test. --- gcc/testsuite/c-c++-common/cpp/pr67046.c | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 gcc/testsuite/c-c++-common/cpp/pr67046.c (limited to 'gcc') diff --git a/gcc/testsuite/c-c++-common/cpp/pr67046.c b/gcc/testsuite/c-c++-common/cpp/pr67046.c new file mode 100644 index 0000000..f37f20c --- /dev/null +++ b/gcc/testsuite/c-c++-common/cpp/pr67046.c @@ -0,0 +1,10 @@ +/* { dg-do preprocess } */ + +_Pragma( +"message(\"msg\")" +) + +_Pragma( +"message(\"msg\")" +# +) -- cgit v1.1