1 files changed, 59 insertions, 0 deletions
diff --git a/deps/jemalloc/test/integration/overflow.c b/deps/jemalloc/test/integration/overflow.c
new file mode 100644
index 000000000..748ebb677
--- /dev/null
+++ b/deps/jemalloc/test/integration/overflow.c
@@ -0,0 +1,59 @@
+#include "test/jemalloc_test.h"
+
+/*
+ * GCC "-Walloc-size-larger-than" warning detects when one of the memory
+ * allocation functions is called with a size larger than the maximum size that
+ * they support. Here we want to explicitly test that the allocation functions
+ * do indeed fail properly when this is the case, which triggers the warning.
+ * Therefore we disable the warning for these tests.
+ */
+JEMALLOC_DIAGNOSTIC_PUSH
+JEMALLOC_DIAGNOSTIC_IGNORE_ALLOC_SIZE_LARGER_THAN
+
+TEST_BEGIN(test_overflow) {
+	unsigned nlextents;
+	size_t mib[4];
+	size_t sz, miblen, max_size_class;
+	void *p;
+
+	sz = sizeof(unsigned);
+	assert_d_eq(mallctl("arenas.nlextents", (void *)&nlextents, &sz, NULL,
+	    0), 0, "Unexpected mallctl() error");
+
+	miblen = sizeof(mib) / sizeof(size_t);
+	assert_d_eq(mallctlnametomib("arenas.lextent.0.size", mib, &miblen), 0,
+	    "Unexpected mallctlnametomib() error");
+	mib[2] = nlextents - 1;
+
+	sz = sizeof(size_t);
+	assert_d_eq(mallctlbymib(mib, miblen, (void *)&max_size_class, &sz,
+	    NULL, 0), 0, "Unexpected mallctlbymib() error");
+
+	assert_ptr_null(malloc(max_size_class + 1),
+	    "Expected OOM due to over-sized allocation request");
+	assert_ptr_null(malloc(SIZE_T_MAX),
+	    "Expected OOM due to over-sized allocation request");
+
+	assert_ptr_null(calloc(1, max_size_class + 1),
+	    "Expected OOM due to over-sized allocation request");
+	assert_ptr_null(calloc(1, SIZE_T_MAX),
+	    "Expected OOM due to over-sized allocation request");
+
+	p = malloc(1);
+	assert_ptr_not_null(p, "Unexpected malloc() OOM");
+	assert_ptr_null(realloc(p, max_size_class + 1),
+	    "Expected OOM due to over-sized allocation request");
+	assert_ptr_null(realloc(p, SIZE_T_MAX),
+	    "Expected OOM due to over-sized allocation request");
+	free(p);
+}
+TEST_END
+
+/* Re-enable the "-Walloc-size-larger-than=" warning */
+JEMALLOC_DIAGNOSTIC_POP
+
+int
+main(void) {
+	return test(
+	    test_overflow);
+}