forked from lix-project/lix
tests/coro-gc: create test for boehm stack patch
Regression test for #7679
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src/libexpr/tests/coro-gc.cc
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src/libexpr/tests/coro-gc.cc
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#include <gtest/gtest.h>
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#if HAVE_BOEHMGC
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#include <gc/gc.h>
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#endif
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#include "eval.hh"
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#include "serialise.hh"
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#define guard_gc(x) GC_register_finalizer((void*)x, finalizer, x##_collected, nullptr, nullptr)
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namespace nix {
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#if HAVE_BOEHMGC
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static bool* uncollectable_bool() {
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bool* res = (bool*)GC_MALLOC_UNCOLLECTABLE(1);
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*res = false;
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return res;
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}
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static void finalizer(void *obj, void *data) {
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//printf("finalizer: obj %p data %p\n", obj, data);
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*((bool*)data) = true;
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}
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// Generate 2 objects, discard one, run gc,
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// see if one got collected and the other didn't
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static void testFinalizerCalls() {
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bool* do_collect_collected = uncollectable_bool();
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bool* dont_collect_collected = uncollectable_bool();
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{
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volatile void* do_collect = GC_MALLOC_ATOMIC(128);
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guard_gc(do_collect);
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}
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volatile void* dont_collect = GC_MALLOC_ATOMIC(128);
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guard_gc(dont_collect);
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GC_gcollect();
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GC_invoke_finalizers();
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ASSERT_TRUE(*do_collect_collected);
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ASSERT_FALSE(*dont_collect_collected);
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ASSERT_NE(nullptr, dont_collect);
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}
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// This test tests that boehm handles coroutine stacks correctly
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TEST(CoroGC, CoroutineStackNotGCd) {
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initGC();
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testFinalizerCalls();
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bool* dont_collect_collected = uncollectable_bool();
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bool* do_collect_collected = uncollectable_bool();
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volatile void* dont_collect = GC_MALLOC_ATOMIC(128);
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guard_gc(dont_collect);
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{
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volatile void* do_collect = GC_MALLOC_ATOMIC(128);
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guard_gc(do_collect);
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}
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auto source = sinkToSource([&](Sink& sink) {
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testFinalizerCalls();
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bool* dont_collect_inner_collected = uncollectable_bool();
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bool* do_collect_inner_collected = uncollectable_bool();
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volatile void* dont_collect_inner = GC_MALLOC_ATOMIC(128);
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guard_gc(dont_collect_inner);
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{
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volatile void* do_collect_inner = GC_MALLOC_ATOMIC(128);
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guard_gc(do_collect_inner);
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}
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// pass control to main
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writeString("foo", sink);
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ASSERT_TRUE(*do_collect_inner_collected);
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ASSERT_FALSE(*dont_collect_inner_collected);
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ASSERT_NE(nullptr, dont_collect_inner);
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// pass control to main
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writeString("bar", sink);
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});
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// pass control to coroutine
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std::string foo = readString(*source);
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ASSERT_EQ(foo, "foo");
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GC_gcollect();
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GC_invoke_finalizers();
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// pass control to coroutine
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std::string bar = readString(*source);
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ASSERT_EQ(bar, "bar");
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ASSERT_FALSE(*dont_collect_collected);
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ASSERT_TRUE(*do_collect_collected);
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ASSERT_NE(nullptr, dont_collect);
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}
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#endif
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}
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@ -16,4 +16,4 @@ libexpr-tests_CXXFLAGS += -I src/libexpr -I src/libutil -I src/libstore -I src/l
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libexpr-tests_LIBS = libstore-tests libutils-tests libexpr libutil libstore libfetchers
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libexpr-tests_LDFLAGS := $(GTEST_LIBS) -lgmock
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libexpr-tests_LDFLAGS := $(GTEST_LIBS) -lgmock -lboost_context
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