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9bec2d3aff
Calling _initialize multiple times is undefined behavior, since the ctors are not guaranteed to be idempotent. We should have this safety check which is similar to #329.
28 lines
635 B
C
28 lines
635 B
C
#if defined(_REENTRANT)
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#include <stdatomic.h>
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extern void __wasi_init_tp(void);
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#endif
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extern void __wasm_call_ctors(void);
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__attribute__((export_name("_initialize")))
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void _initialize(void) {
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#if defined(_REENTRANT)
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static volatile atomic_int initialized = 0;
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int expected = 0;
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if (!atomic_compare_exchange_strong(&initialized, &expected, 1)) {
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__builtin_trap();
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}
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__wasi_init_tp();
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#else
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static volatile int initialized = 0;
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if (initialized != 0) {
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__builtin_trap();
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}
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initialized = 1;
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#endif
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// The linker synthesizes this to call constructors.
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__wasm_call_ctors();
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}
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