920728d14d
This commit implements registering unwind information for JIT functions on Windows so that the operating system can both walk and unwind stacks containing JIT frames. Currently this only works with Cranelift as lightbeam does not emit unwind information yet. This commit also resets the stack guard page on Windows for stack overflow exceptions, allowing reliable stack overflow traps. With these changes, all previously disabled test suite tests (not including the multi-value tests) on Windows are now passing. Fixes #291.
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#ifndef signal_handlers_h
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#define signal_handlers_h
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#include <stdint.h>
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#include <setjmp.h>
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#ifndef __cplusplus
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#include <stdbool.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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int8_t CheckIfTrapAtAddress(const uint8_t* pc);
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// Record the Trap code and wasm bytecode offset in TLS somewhere
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void RecordTrap(const uint8_t* pc, bool reset_guard_page);
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void* EnterScope(void*);
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void LeaveScope(void*);
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void* GetScope(void);
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void Unwind(void);
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// This function performs the low-overhead signal handler initialization that we
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// want to do eagerly to ensure a more-deterministic global process state. This
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// is especially relevant for signal handlers since handler ordering depends on
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// installation order: the wasm signal handler must run *before* the other crash
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// handlers and since POSIX signal handlers work LIFO, this function needs to be
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// called at the end of the startup process, after other handlers have been
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// installed. This function can thus be called multiple times, having no effect
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// after the first call.
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int
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EnsureEagerSignalHandlers(void);
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// Assuming EnsureEagerProcessSignalHandlers() has already been called,
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// this function performs the full installation of signal handlers which must
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// be performed per-thread. This operation may incur some overhead and
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// so should be done only when needed to use wasm.
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int
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EnsureDarwinMachPorts(void);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // signal_handlers_h
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