darling-objc4/test/gdb.m

// TEST_CFLAGS -Wno-deprecated-declarations

#include "test.h"
#include "testroot.i"
#include <objc/objc-gdb.h>
#include <objc/runtime.h>

#define SwiftV1MangledName4 "_TtC6Swiftt13SwiftV1Class4"
__attribute__((objc_runtime_name(SwiftV1MangledName4)))
@interface SwiftV1Class4 : TestRoot @end
@implementation SwiftV1Class4 @end

int main()
{
    // Class hashes
    Class result;

    // Class should not be realized yet
    // fixme not true during class hash rearrangement
    // result = NXMapGet(gdb_objc_realized_classes, "TestRoot");
    // testassert(!result);

    [TestRoot class];
    // Now class should be realized

    if (!testdyld3()) {
        // In dyld3 mode, the class will be in the launch closure and not in our table.
        result = (__bridge Class)(NXMapGet(gdb_objc_realized_classes, "TestRoot"));
        testassert(result);
        testassert(result == [TestRoot class]);
    }

    Class dynamic = objc_allocateClassPair([TestRoot class], "Dynamic", 0);
    objc_registerClassPair(dynamic);
    result = (__bridge Class)(NXMapGet(gdb_objc_realized_classes, "Dynamic"));
    testassert(result);
    testassert(result == dynamic);

    Class *realizedClasses = objc_copyRealizedClassList(NULL);
    bool foundTestRoot = false;
    bool foundDynamic = false;
    for (Class *cursor = realizedClasses; *cursor; cursor++) {
        if (*cursor == [TestRoot class])
            foundTestRoot = true;
        if (*cursor == dynamic)
            foundDynamic = true;
    }
    free(realizedClasses);
    testassert(foundTestRoot);
    testassert(foundDynamic);

    result = (__bridge Class)(NXMapGet(gdb_objc_realized_classes, "DoesNotExist"));
    testassert(!result);

    // Class structure decoding
    
    uintptr_t *maskp = (uintptr_t *)dlsym(RTLD_DEFAULT, "objc_debug_class_rw_data_mask");
    testassert(maskp);
    
    // Raw class names
    testassert(strcmp(objc_debug_class_getNameRaw([SwiftV1Class4 class]), SwiftV1MangledName4) == 0);
    testassert(strcmp(objc_debug_class_getNameRaw([TestRoot class]), "TestRoot") == 0);


    succeed(__FILE__);
}