From d8fdd380f39aa413886c61c2e3624ba3b4582dc0 Mon Sep 17 00:00:00 2001 From: Michael Matz Date: Sun, 9 Jul 2017 04:30:36 +0200 Subject: tccpp: Fix corner case See added testcase 19.c from a bug report. The problem is reading outside the arguments buffers, even though we aren't allowed to. The single can_read_stream variable is not enough, sometimes we need to be able to pop into outer contexts but not into arbitrarily outside contexts. The trick is to terminate argument tokens with a EOF (and not just with 0 that makes us pop contexts), and deal with that in the few places we have to, This enables some cleanups of the can_read_stream variable use. --- tests/pp/20.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 tests/pp/20.c (limited to 'tests/pp/20.c') diff --git a/tests/pp/20.c b/tests/pp/20.c new file mode 100644 index 0000000..7944d62 --- /dev/null +++ b/tests/pp/20.c @@ -0,0 +1,13 @@ +/* Various things I encountered while hacking the pre processor */ +#define wrap(x) x +#define pr_warning(fmt, ...) printk(KERN_WARNING fmt, ##__VA_ARGS__) +#define pr_warn(x,y) pr_warning(x,y) +#define net_ratelimited_function(function, ...) function(__VA_ARGS__) +X1 net_ratelimited_function(pr_warn, "pipapo", bla); +X2 net_ratelimited_function(wrap(pr_warn), "bla", foo); +#define two m n +#define chain4(a,b,c,d) a ## b ## c ## d +X2 chain4(two,o,p,q) +X3 chain4(o,two,p,q) +X4 chain4(o,p,two,q) +X5 chain4(o,p,q,two) -- cgit v1.3.1