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Implement async termination of blocking thread (#2516)

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Send a signal whose handler is no-op to a blocking thread to wake up
the blocking syscall with either EINTR equivalent or partial success.

Unlike the approach taken in the `dev/interrupt_block_insn` branch (that is,
signal + longjmp similarly to `OS_ENABLE_HW_BOUND_CHECK`), this PR
does not use longjmp because:
* longjmp from signal handler doesn't work on nuttx
  refer to https://github.com/apache/nuttx/issues/10326
* the singal+longjmp approach may be too difficult for average programmers
  who might implement host functions to deal with

See also https://github.com/bytecodealliance/wasm-micro-runtime/issues/1910
This commit is contained in:
YAMAMOTO Takashi
2023-09-20 19:11:52 +09:00
committed by GitHub
parent d436e846ab
commit 444b159963
21 changed files with 1029 additions and 302 deletions
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7
build-scripts/config_common.cmake
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@ -273,6 +273,13 @@ else ()
add_definitions (-DWASM_DISABLE_STACK_HW_BOUND_CHECK=0)
endif ()
endif ()
if (WAMR_DISABLE_WAKEUP_BLOCKING_OP EQUAL 1)
add_definitions (-DWASM_DISABLE_WAKEUP_BLOCKING_OP=1)
message (" Wakeup of blocking operations disabled")
else ()
add_definitions (-DWASM_DISABLE_WAKEUP_BLOCKING_OP=0)
message (" Wakeup of blocking operations enabled")
endif ()
if (WAMR_BUILD_SIMD EQUAL 1)
if (NOT WAMR_BUILD_TARGET MATCHES "RISCV64.*")
add_definitions (-DWASM_ENABLE_SIMD=1)