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65f95f26ff
configure.ac: setup build tools and register objects main.c: wrap main with rb_wasm_rt_start to handle asyncify unwinds tool/m4/ruby_wasm_tools.m4: setup default command based on WASI_SDK_PATH environment variable. checks wasm-opt which is used for asyncify. tool/wasm-clangw wasm/wasm-opt: a clang wrapper which replaces real wasm-opt with do-nothing wasm-opt to avoid misoptimization before asyncify. asyncify is performed at POSTLINK, but clang linker driver tries to run optimization by wasm-opt unconditionally. inlining pass at wasm level breaks asyncify's assumption, so should not optimize before POSTLIK. wasm/GNUmakefile.in: wasm specific rules to compile objects
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#ifndef RB_WASM_SUPPORT_FIBER_H
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#define RB_WASM_SUPPORT_FIBER_H
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#include <stdbool.h>
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#ifndef WASM_FIBER_STACK_BUFFER_SIZE
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# define WASM_FIBER_STACK_BUFFER_SIZE 6144
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#endif
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struct __rb_wasm_asyncify_fiber_ctx {
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void* top;
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void* end;
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char buffer[WASM_FIBER_STACK_BUFFER_SIZE];
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};
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// Fiber execution context needed to perform context switch
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typedef struct {
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// Fiber entry point called when the fiber started for the first time.
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// NULL if the entry point is main
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void (*entry_point)(void *, void *);
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// Opaque argument pointers passed to the entry point function
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void *arg0, *arg1;
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// Internal asyncify buffer space
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struct __rb_wasm_asyncify_fiber_ctx asyncify_buf;
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bool is_rewinding;
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bool is_started;
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} rb_wasm_fiber_context;
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// Initialize a given fiber context to be ready to pass to `rb_wasm_swapcontext`
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void rb_wasm_init_context(rb_wasm_fiber_context *fcp, void (*func)(void *, void *), void *arg0, void *arg1);
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// Swap the execution control with `target_fiber` and save the current context in `old_fiber`
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// NOTE: `old_fiber` must be the current executing fiber context
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void rb_wasm_swapcontext(rb_wasm_fiber_context *old_fiber, rb_wasm_fiber_context *target_fiber);
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// Returns the Asyncify buffer of next fiber if unwound for fiber context switch.
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// Used by the top level Asyncify handling in wasm/runtime.c
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void *rb_wasm_handle_fiber_unwind(void (**new_fiber_entry)(void *, void *),
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void **arg0, void **arg1, bool *is_new_fiber_started);
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#endif
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