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61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/*
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Multi-segment C++ exception test.
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Exercises the interaction between segmented code and .eh_frame:
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- exceptions thrown and caught within one segment,
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- an exception thrown in a different segment and caught in the main
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segment (so the unwinder walks out of the segment-2 frame),
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- the same after that segment has been unloaded (exercising the
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per-segment __register_frame_info/__deregister_frame_info and the
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main segment's .eh_frame on its own), and
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- after reloading that segment.
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The segment-2 object additionally defines an unused throwing function so
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that --gc-sections has to drop an FDE from that segment's .eh_frame.
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*/
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#include "Test.h"
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#include <SegLoad.h>
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#include <Memory.h>
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extern "C" void throwFromSeg2();
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static int failures;
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static void throwInMain()
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{
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throw 42;
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}
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int main()
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{
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MaxApplZone();
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MoreMasters();
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/* 1. throw and catch within the main segment */
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try { throwInMain(); TestLog("1: no throw"); ++failures; }
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catch (...) {}
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/* 2. throw in segment 2, catch in the main segment. This loads
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segment 2 and makes the unwinder walk out of it. */
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try { throwFromSeg2(); TestLog("2: no throw"); ++failures; }
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catch (...) {}
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/* 3. unload segment 2, then throw and catch in the main segment
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again. Segment 2's .eh_frame is deregistered here. */
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UnloadSeg((void*)&throwFromSeg2);
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try { throwInMain(); TestLog("3: no throw"); ++failures; }
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catch (...) {}
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/* 4. reload segment 2 and cross the segment boundary again */
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try { throwFromSeg2(); TestLog("4: no throw"); ++failures; }
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catch (...) {}
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UnloadSeg((void*)&throwFromSeg2);
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if (failures == 0)
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TestLog("OK");
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return failures == 0 ? 0 : 1;
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}
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