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-rw-r--r--build/clang-plugin/tests/TestSprintfLiteral.cpp41
1 files changed, 41 insertions, 0 deletions
diff --git a/build/clang-plugin/tests/TestSprintfLiteral.cpp b/build/clang-plugin/tests/TestSprintfLiteral.cpp
new file mode 100644
index 0000000000..a8dac4009c
--- /dev/null
+++ b/build/clang-plugin/tests/TestSprintfLiteral.cpp
@@ -0,0 +1,41 @@
+#include <cstdio>
+
+void bad() {
+ char x[100];
+ snprintf(x, sizeof(x), "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
+ snprintf(x, 100, "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
+ const int hundred = 100;
+ snprintf(x, hundred, "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
+}
+
+void ok() {
+ char x[100];
+ int y;
+ snprintf(x, sizeof(y), "what");
+
+ snprintf(x, 50, "what");
+
+ int nothundred = 100;
+ nothundred = 99;
+ snprintf(x, nothundred, "what");
+}
+
+void vargs_bad(va_list args) {
+ char x[100];
+ vsnprintf(x, sizeof(x), "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
+ vsnprintf(x, 100, "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
+ const int hundred = 100;
+ vsnprintf(x, hundred, "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
+}
+
+void vargs_good(va_list args) {
+ char x[100];
+ int y;
+ vsnprintf(x, sizeof(y), "what", args);
+
+ vsnprintf(x, 50, "what", args);
+
+ int nothundred = 100;
+ nothundred = 99;
+ vsnprintf(x, nothundred, "what", args);
+}