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126 lines
3.3 KiB
C++
126 lines
3.3 KiB
C++
#include <cstdio>
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#include <cstdlib>
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#include "unwind.h"
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#define EXCEPTION_CLASS(a,b,c,d,e,f,g,h) \
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((static_cast<uint64_t>(a) << 56) +\
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(static_cast<uint64_t>(b) << 48) +\
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(static_cast<uint64_t>(c) << 40) +\
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(static_cast<uint64_t>(d) << 32) +\
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(static_cast<uint64_t>(e) << 24) +\
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(static_cast<uint64_t>(f) << 16) +\
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(static_cast<uint64_t>(g) << 8) +\
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(static_cast<uint64_t>(h)))
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// using ld --wrap=_Unwind_RaiseException hook feature
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extern "C" _Unwind_Reason_Code __real__Unwind_RaiseException (_Unwind_Exception *e);
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extern "C" _Unwind_Reason_Code __wrap__Unwind_RaiseException (_Unwind_Exception *e);
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extern "C" _Unwind_Reason_Code __wrap__Unwind_RaiseException (_Unwind_Exception *e)
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{
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// clobber exception class forcing libcxx own exceptions to be treated
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// as foreign exception within libcxx itself
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e->exception_class = EXCEPTION_CLASS('F','O','R','E','I','G','N','\0');
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__real__Unwind_RaiseException(e);
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}
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_Unwind_Exception global_e;
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enum test_status {
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PENDING, PASSED, FAILED
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};
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const char test_status_str[][8] = {
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"PENDING", "PASSED", "FAILED"
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};
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test_status test1_status = PENDING;
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test_status test2_status = PENDING;
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test_status test3_status = PENDING;
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void test2_exception_cleanup(_Unwind_Reason_Code code, _Unwind_Exception *e)
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{
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fputs("(2) exception_cleanup called\n", stderr);
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if (e != &global_e) {
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fprintf(stderr, "(2) ERROR: unexpected ptr: expecting %p, got %p\n", &global_e, e);
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test2_status = FAILED;
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}
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if (test2_status == PENDING)
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test2_status = PASSED;
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}
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struct test3_exception
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{
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static int counter;
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~test3_exception()
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{
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counter++;
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fputs("(3) exception dtor\n", stderr);
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}
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};
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int test3_exception::counter = 0;
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int main()
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{
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///////////////////////////////////////////////////////////////
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fputs("(1) foreign exception, exception_cleanup=nullptr\n", stderr);
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try
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{
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global_e.exception_class = 0;
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global_e.exception_cleanup = 0;
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__real__Unwind_RaiseException(&global_e);
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}
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catch (...)
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{
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}
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test1_status = PASSED;
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fputs("(1) PASS\n", stderr);
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///////////////////////////////////////////////////////////////
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fputs("(2) foreign exception, exception_cleanup present\n", stderr);
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try
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{
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global_e.exception_class = 0;
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global_e.exception_cleanup = test2_exception_cleanup;
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__real__Unwind_RaiseException(&global_e);
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}
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catch (...)
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{
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}
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fprintf(stderr, "(2) %s\n", test_status_str[test2_status]);
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///////////////////////////////////////////////////////////////
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fputs("(3) C++ exception in foreign environment\n", stderr);
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int counter_expected;
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try
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{
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// throw was rigged such that the runtime treats C++ exceptions
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// as foreign ones
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throw test3_exception();
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}
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catch (test3_exception&)
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{
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fputs("(3) ERROR: wrong catch\n", stderr);
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test3_status = FAILED;
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}
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catch (...)
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{
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fputs("(3) catch(...)\n", stderr);
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counter_expected = test3_exception::counter + 1;
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// one more dtor immediately after we leave catch
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}
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if (test3_status == PENDING && test3_exception::counter != counter_expected) {
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fputs("(3) ERROR: exception dtor didn't run\n", stderr);
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test3_status = FAILED;
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}
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if (test3_status == PENDING)
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test3_status = PASSED;
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fprintf(stderr, "(3) %s\n", test_status_str[test3_status]);
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///////////////////////////////////////////////////////////////
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if (test1_status == PASSED && test2_status == PASSED && test3_status == PASSED)
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return EXIT_SUCCESS;
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else
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return EXIT_FAILURE;
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}
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