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The current codebase makes use of the zero-length array language extension
to the C90 standard, but the preferred mechanism to declare variable-length
types such as these ones is a flexible array member[1][2], introduced in
C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning in
case the flexible array does not occur last in the structure, which will
help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by this
change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit
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|---|---|---|
| .. | ||
| host.c | ||
| host.h | ||
| init.c | ||
| isci.h | ||
| Makefile | ||
| phy.c | ||
| phy.h | ||
| port_config.c | ||
| port.c | ||
| port.h | ||
| probe_roms.c | ||
| probe_roms.h | ||
| registers.h | ||
| remote_device.c | ||
| remote_device.h | ||
| remote_node_context.c | ||
| remote_node_context.h | ||
| remote_node_table.c | ||
| remote_node_table.h | ||
| request.c | ||
| request.h | ||
| sas.h | ||
| scu_completion_codes.h | ||
| scu_event_codes.h | ||
| scu_remote_node_context.h | ||
| scu_task_context.h | ||
| task.c | ||
| task.h | ||
| unsolicited_frame_control.c | ||
| unsolicited_frame_control.h | ||