tests: compile some tools/tests as C++

[lttng-tools.git] / tests / utils / testapp / gen-syscall-events / gen-syscall-events.c

diff --git a/tests/utils/testapp/gen-syscall-events/gen-syscall-events.c b/tests/utils/testapp/gen-syscall-events/gen-syscall-events.c
deleted file mode 100644 (file)
index 6a24686..0000000
--- a/tests/utils/testapp/gen-syscall-events/gen-syscall-events.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2017 Francis Deslauriers <francis.deslauriers@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-#include <common/error.h>
-#include <common/align.h>
-
-#include "utils.h"
-
-#define MAX_LEN 16
-
-/*
- * The LTTng system call tracing facilities can't handle page faults at the
- * moment. If a fault would occur while reading a syscall argument, the
- * tracer will report an empty string (""). Since the proper execution of the
- * tests which use this generator depends on some syscall string arguments being
- * present, this util allows us to mitigate the page-fault risk.
- *
- * This isn't a proper fix; it is simply the best we can do for now.
- * See bug #1261 for more context.
- */
-static
-void prefault_string(const char *p)
-{
-       const char * const end = p + strlen(p) + 1;
-
-       while (p < end) {
-               /*
-                * Trigger a read attempt on *p, faulting-in the pages
-                * for reading.
-                */
-               asm volatile("" : : "m"(*p));
-               p += sysconf(_SC_PAGE_SIZE);
-       }
-}
-
-static
-int open_read_close(const char *path)
-{
-       int fd, ret;
-       char buf[MAX_LEN];
-
-       /*
-        * Start generating syscalls. We use syscall(2) to prevent libc from
-        * changing the underlying syscall (e.g. calling openat(2) instead of
-        * open(2)).
-        */
-       prefault_string(path);
-       fd = syscall(SYS_openat, AT_FDCWD, path, O_RDONLY);
-       if (fd < 0) {
-               PERROR_NO_LOGGER("Failed to open file with openat(): path = '%s'", path);
-               ret = -1;
-               goto error;
-       }
-
-       ret = syscall(SYS_read, fd, buf, MAX_LEN);
-       if (ret < 0) {
-               PERROR_NO_LOGGER("Failed to read file: path = '%s', fd = %d, length = %d",
-                               path, fd, MAX_LEN);
-               ret = -1;
-               goto error;
-       }
-
-       ret = syscall(SYS_close, fd);
-       if (ret == -1) {
-               PERROR_NO_LOGGER("Failed to close file: path = '%s', fd = %d", path, fd);
-               ret = -1;
-               goto error;
-       }
-
-error:
-       return ret;
-}
-
-/*
- * The process waits for the creation of a file passed as argument from an
- * external processes to execute a syscall and exiting. This is useful for tests
- * in combinaison with LTTng's PID tracker feature where we can trace the kernel
- * events generated by our test process only.
- */
-int main(int argc, char **argv)
-{
-       int ret;
-       const char *start_file, *path1, *path2;
-
-       if (argc != 4) {
-               fprintf(stderr, "Error: Missing argument\n");
-               fprintf(stderr, "USAGE: %s PATH_WAIT_FILE PATH1_TO_OPEN PATH2_TO_OPEN\n", argv[0]);
-               ret = -1;
-               goto error;
-       }
-
-       start_file = argv[1];
-       path1 = argv[2];
-       path2 = argv[3];
-
-       /*
-        * Wait for the start_file to be created by an external process
-        * (typically the test script) before executing the syscalls.
-        */
-       ret = wait_on_file(start_file);
-       if (ret != 0) {
-               goto error;
-       }
-
-       /*
-        * Start generating syscalls. We use syscall(2) to prevent libc to change
-        * the underlying syscall. e.g. calling openat(2) instead of open(2).
-        */
-       ret = open_read_close(path1);
-       if (ret == -1) {
-               ret = -1;
-               goto error;
-       }
-
-       ret = open_read_close(path2);
-       if (ret == -1) {
-               ret = -1;
-               goto error;
-       }
-
-error:
-       return ret;
-}