Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu. Pushed to trunk as r16-313-g8c80fc106482dd.
gcc/testsuite/ChangeLog: PR analyzer/107017 * c-c++-common/analyzer/sprintf-3.c: New test, covering use of sprintf with specific format strings. Doesn't yet find problems as the analyzer doesn't yet understand the format strings. --- .../c-c++-common/analyzer/sprintf-3.c | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 gcc/testsuite/c-c++-common/analyzer/sprintf-3.c diff --git a/gcc/testsuite/c-c++-common/analyzer/sprintf-3.c b/gcc/testsuite/c-c++-common/analyzer/sprintf-3.c new file mode 100644 index 00000000000..ac5169e71b8 --- /dev/null +++ b/gcc/testsuite/c-c++-common/analyzer/sprintf-3.c @@ -0,0 +1,44 @@ +/* See e.g. https://en.cppreference.com/w/c/io/fprintf + and https://www.man7.org/linux/man-pages/man3/sprintf.3.html */ + +extern int +sprintf(char* dst, const char* fmt, ...) + __attribute__((__nothrow__)); + +#include "../../gcc.dg/analyzer/analyzer-decls.h" + +void test_text_ok (void) +{ + char buf[16]; + sprintf (buf, "hello world"); +} + +void test_text_oob (void) +{ + char buf[3]; + sprintf (buf, "hello world"); /* { dg-warning "out-of-bounds" "PR analyzer/107017" { xfail *-*-* } } */ +} + +void test_percent_s_ok (void) +{ + char buf[16]; + sprintf (buf, "%s", "foo"); +} + +void test_percent_s_oob (void) +{ + char buf[3]; + sprintf (buf, "%s", "foo"); /* { dg-warning "out-of-bounds" "PR analyzer/107017" { xfail *-*-* } } */ +} + +void test_percent_i_ok (void) +{ + char buf[16]; + sprintf (buf, "%i", "42"); +} + +void test_percent_i_oob (void) +{ + char buf[4]; + sprintf (buf, "%i", "1066"); /* { dg-warning "out-of-bounds" "PR analyzer/107017" { xfail *-*-* } } */ +} -- 2.26.3