gcc warns that 'heap_type' is not initialized if we don't come through any of the two 'case' statesments before:
ionapp_export.c:91:2: warning: ‘heap_type’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("heap_type: %ld, heap_size: %ld\n", heap_type, heap_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In the current code, we initialize the heap_type to -1 before the 'case' statements. We also change the print_usage function to state that heap_type and heap_size isn't optional, they are mandatory.
Fixes: 47a18c42d992 ("android/ion: userspace test utility for ion buffer sharing") Signed-off-by: Anders Roxell anders.roxell@linaro.org --- .../testing/selftests/android/ion/ionapp_export.c | 23 +++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/android/ion/ionapp_export.c b/tools/testing/selftests/android/ion/ionapp_export.c index a944e72621a9..b42f803e9d2a 100644 --- a/tools/testing/selftests/android/ion/ionapp_export.c +++ b/tools/testing/selftests/android/ion/ionapp_export.c @@ -31,16 +31,24 @@
void print_usage(int argc, char *argv[]) { - printf("Usage: %s [-h <help>] [-i <heap id>] [-s <size in bytes>]\n", + printf("Usage: %s [-h <help>] -i <heap id> -s <size in bytes>\n", argv[0]); }
+void heap_type_error_text(void) +{ + printf("heap_type must be specified\n"); + printf(" need to specify -i <heap_type>\n"); + printf(" supported heap types 0 or 1\n"); +} + int main(int argc, char *argv[]) { int opt, ret, status, heapid; int sockfd, client_fd, shared_fd; unsigned char *map_buf; - unsigned long map_len, heap_type, heap_size, flags; + unsigned long map_len, heap_size, flags; + long heap_type; struct ion_buffer_info info; struct socket_info skinfo;
@@ -50,6 +58,7 @@ int main(int argc, char *argv[]) }
heap_size = 0; + heap_type = -1; flags = 0;
while ((opt = getopt(argc, argv, "hi:s:")) != -1) { @@ -68,7 +77,8 @@ int main(int argc, char *argv[]) heap_type = ION_HEAP_TYPE_SYSTEM_CONTIG; break; default: - printf("ERROR: heap type not supported\n"); + heap_type_error_text(); + print_usage(argc, argv); exit(1); } break; @@ -82,8 +92,15 @@ int main(int argc, char *argv[]) } }
+ if (heap_type < 0) { + heap_type_error_text(); + print_usage(argc, argv); + exit(1); + } + if (heap_size <= 0) { printf("heap_size cannot be 0\n"); + printf(" need to specify -s <heap_size>\n"); print_usage(argc, argv); exit(1); }