724beaf0f3
This commit adds a `#[link]` annotation to the block defining symbols coming from a native static library that we build and link. This is required by rustc to get symbols to get exported correctly when linking wasmtime into a Rust dynamic library instead of always as an rlib. While I was at it I went ahead and renamed the symbols now that they're no longer in C++ and they're doing setjmp/longjmp and not much else. Closes #3006
35 lines
998 B
C
35 lines
998 B
C
#include <setjmp.h>
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// Note that `sigsetjmp` and `siglongjmp` are used here where possible to
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// explicitly pass a 0 argument to `sigsetjmp` that we don't need to preserve
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// the process signal mask. This should make this call a bit faster b/c it
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// doesn't need to touch the kernel signal handling routines.
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#ifdef CFG_TARGET_OS_windows
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#define platform_setjmp(buf) setjmp(buf)
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#define platform_longjmp(buf, arg) longjmp(buf, arg)
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#define platform_jmp_buf jmp_buf
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#else
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#define platform_setjmp(buf) sigsetjmp(buf, 0)
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#define platform_longjmp(buf, arg) siglongjmp(buf, arg)
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#define platform_jmp_buf sigjmp_buf
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#endif
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int wasmtime_setjmp(
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void **buf_storage,
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void (*body)(void*, void*),
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void *payload,
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void *callee) {
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platform_jmp_buf buf;
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if (platform_setjmp(buf) != 0) {
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return 0;
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}
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*buf_storage = &buf;
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body(payload, callee);
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return 1;
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}
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void wasmtime_longjmp(void *JmpBuf) {
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platform_jmp_buf *buf = (platform_jmp_buf*) JmpBuf;
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platform_longjmp(*buf, 1);
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}
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