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Commit146cb38

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Work around issues in MinGW-64's setjmp/longjmp support.
It's hard to avoid the conclusion that there is something wrong withsetjmp/longjmp on MinGW-64, as we have seen failures come and go afterentirely-unrelated-looking changes in our own code. Other projectssuch as Ruby have given up and started using gcc's setjmp/longjmpbuiltins on that platform; this patch just follows that lead.Note that this is a pretty fundamental ABI break for functionscontainining either setjmp or longjmp, so we can't really considera back-patch.Per reports from Regina Obe and Heath Lord, as well as recent failureson buildfarm member walleye, and less-recent failures on fairywren.Juan José Santamaría FlechaDiscussion:https://postgr.es/m/000401d716a0$1ed0fc70$5c72f550$@pcorp.usDiscussion:https://postgr.es/m/CA+BEBhvHhM-Bn628pf-LsjqRh3Ang7qCSBG0Ga+7KwhGqrNUPw@mail.gmail.comDiscussion:https://postgr.es/m/f1caef93-9640-022e-9211-bbe8755a56b0@2ndQuadrant.com
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‎src/include/c.h

Lines changed: 10 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1335,14 +1335,21 @@ extern unsigned long long strtoull(const char *str, char **endptr, int base);
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/*
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* When there is no sigsetjmp, its functionality is provided by plain
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* setjmp. Incidentally, nothing provides setjmp's functionality in
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* that case. We now support the case only on Windows.
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* setjmp. We now support the case only on Windows. However, it seems
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* that MinGW-64 has some longstanding issues in its setjmp support,
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* so on that toolchain we cheat and use gcc's builtins.
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*/
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#ifdefWIN32
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#ifdef__MINGW64__
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typedefintptr_tsigjmp_buf[5];
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#definesigsetjmp(x,y) __builtin_setjmp(x)
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#definesiglongjmp __builtin_longjmp
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#else/* !__MINGW64__ */
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#definesigjmp_buf jmp_buf
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#definesigsetjmp(x,y) setjmp(x)
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#definesiglongjmp longjmp
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#endif
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#endif/* __MINGW64__ */
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#endif/* WIN32 */
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/* EXEC_BACKEND defines */
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#ifdefEXEC_BACKEND

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