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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2025-10-28 16:32:08 +0300 |
|---|---|---|
| committer | Chris Li <chriscli@google.com> | 2025-12-01 19:17:45 +0400 |
| commit | 27b34d720c4a06a90ed1982e91e1c049471f12e2 (patch) | |
| tree | 76b02ed86615d8b134accf111bd94b822fad9ef7 | |
| parent | fbdde3127b83e6d09e0ba808d7925dd84407f3c6 (diff) | |
| download | sparse-dev-27b34d720c4a06a90ed1982e91e1c049471f12e2.tar.gz | |
validation: add check for typeof() and address spaces
The typeof() key word should preserve the address space and
typeof_unqual() should not. Add a check to verify this works as
expected.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Chris Li <chriscli@google.com>
| -rw-r--r-- | validation/typeof-as.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/validation/typeof-as.c b/validation/typeof-as.c new file mode 100644 index 00000000..69d515b7 --- /dev/null +++ b/validation/typeof-as.c @@ -0,0 +1,32 @@ +#define __seg_gs __attribute__((address_space(__seg_gs))) +static int __seg_gs m; + +static int __seg_gs bad_manual (void) +{ + return (*(int *)&m); +} + +static int __seg_gs good_manual (void) +{ + return (*(int __seg_gs *)&m); +} + +static int bad_typeof (void) +{ + return (*(typeof_unqual(m) *)&m); +} + +static int __seg_gs good_typeof (void) +{ + return (*(volatile typeof(m) *)&m); +} + +/* + * check-name: typeof address space + * check-command: ./sparse typeof-as.c + * + * check-error-start +typeof-as.c:6:19: warning: cast removes address space '__seg_gs' of expression +typeof-as.c:16:19: warning: cast removes address space '__seg_gs' of expression + * check-error-end + */ |