Coverage: Do not print messages from gcov

We need to ignore messages from gcov. All those messages
start with profiling: and are printed using vfprintf(), so
the only thing we can do is add a library overriding those
functions and linking apt-pkg to it.

1 files changed, 50 insertions, 0 deletions

diff --git a/test/interactive-helper/libnoprofile.c b/test/interactive-helper/libnoprofile.c
new file mode 100644
index 000000000..2cba6dc8b
--- /dev/null
+++ b/test/interactive-helper/libnoprofile.c
@@ -0,0 +1,50 @@
+#define _GNU_SOURCE
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int vprintf(const char *format, va_list ap) {
+	static int (*func_fprintf)(const char *format, va_list ap) = NULL;
+	if (func_fprintf == NULL)
+		func_fprintf = (int (*) (const char *format, va_list ap)) dlsym(RTLD_NEXT, "vprintf");
+
+    va_list ap2;
+    va_copy(ap2, ap);
+    if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
+        return 0;
+    int res = func_fprintf(format, ap2);
+    va_end(ap2);
+    return res;
+}
+int printf(const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+    int res = vprintf(format, ap);
+    va_end(ap);
+    return res;
+}
+
+int vfprintf(FILE *stream, const char *format, va_list ap) {
+	static int (*func_vfprintf)(FILE *stream, const char *format, va_list ap) = NULL;
+	if (func_vfprintf == NULL)
+		func_vfprintf = (int (*) (FILE *stream, const char *format, va_list ap)) dlsym(RTLD_NEXT, "vfprintf");
+
+    va_list ap2;
+    va_copy(ap2, ap);
+    if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
+        return 0;
+    int res = func_vfprintf(stream, format, ap2);
+    va_end(ap2);
+    return res;
+}
+
+int fprintf(FILE *stream, const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+    int res = vfprintf(stream, format, ap);
+    va_end(ap);
+    return res;
+}