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Add WASI platform support.

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This includes the following significant changes:
  * Patching ezsat and minisat to disable resource limiting code
    on WASM/WASI, since the POSIX functions they use are unavailable.
  * Adding a new definition, YOSYS_DISABLE_SPAWN, present if platform
    does not support spawning subprocesses (i.e. Emscripten or WASI).
    This definition hides the definition of `run_command()`.
  * Adding a new Makefile flag, DISABLE_SPAWN, present in the same
    condition. This flag disables all passes that require spawning
    subprocesses for their function.
This commit is contained in:
whitequark 2019-11-11 09:23:06 +00:00
parent bc380b0b56
commit b43c282e4e
17 changed files with 167 additions and 30 deletions
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8
libs/minisat/System.cc
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@ -101,7 +101,7 @@ double Minisat::memUsedPeak(bool) { return 0; }
#endif
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
void Minisat::limitMemory(uint64_t max_mem_mb)
{
// FIXME: OpenBSD does not support RLIMIT_AS. Not sure how well RLIMIT_DATA works instead.
@ -133,7 +133,7 @@ void Minisat::limitMemory(uint64_t /*max_mem_mb*/)
#endif
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__wasm)
void Minisat::limitTime(uint32_t max_cpu_time)
{
if (max_cpu_time != 0){
@ -156,9 +156,13 @@ void Minisat::limitTime(uint32_t /*max_cpu_time*/)
void Minisat::sigTerm(void handler(int))
{
#if defined(__wasm)
(void)handler;
#else
signal(SIGINT, handler);
signal(SIGTERM,handler);
#ifdef SIGXCPU
signal(SIGXCPU,handler);
#endif
#endif
}