Initial commit 🎉

fbshipit-source-id: b6fc29740c6875d2e78953b8a7123890a67930f2
Co-authored-by: Sebastian McKenzie <sebmck@fb.com>
Co-authored-by: John Knox <jknox@fb.com>
Co-authored-by: Emil Sjölander <emilsj@fb.com>
Co-authored-by: Pritesh Nandgaonkar <prit91@fb.com>

libs/fbjni/src/main/cpp/assert.cpp

@@ -0,0 +1,39 @@
+/*
+ *  Copyright (c) 2015-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+#include <cstdarg>
+#include <stdio.h>
+
+#include <fb/assert.h>
+#include <fb/log.h>
+
+namespace facebook {
+
+#define ASSERT_BUF_SIZE 4096
+static char sAssertBuf[ASSERT_BUF_SIZE];
+static AssertHandler gAssertHandler;
+
+void assertInternal(const char* formatstr ...) {
+    va_list va_args;
+    va_start(va_args, formatstr);
+    vsnprintf(sAssertBuf, sizeof(sAssertBuf), formatstr, va_args);
+    va_end(va_args);
+    if (gAssertHandler != NULL) {
+        gAssertHandler(sAssertBuf);
+    }
+    FBLOG(LOG_FATAL, "fbassert", "%s", sAssertBuf);
+    // crash at this specific address so that we can find our crashes easier
+    *(int*)0xdeadb00c = 0;
+    // let the compiler know we won't reach the end of the function
+     __builtin_unreachable();
+}
+
+void setAssertHandler(AssertHandler assertHandler) {
+    gAssertHandler = assertHandler;
+}
+
+} // namespace facebook