Implement 2-level Multi-tier JIT engine: tier-up from Fast JIT to LLVM JIT to
get quick cold startup by Fast JIT and better performance by gradually
switching to LLVM JIT when the LLVM JIT functions are compiled by the
backend threads.
Refer to:
https://github.com/bytecodealliance/wasm-micro-runtime/issues/1302
Error was reported when building docker image:
/usr/bin/ld: libaotclib.a(aot_llvm_extra.cpp.o): relocation R_X86_64_32S against symbol
`_ZN4llvm30TargetTransformInfoWrapperPass2IDE' can not be used when making a PIE object;
recompile with -fPIC
Add `-fPIC` to `CMAKE_CXX_FLAGS` and `CMAKE_SHARED_LIBRARY_LINK_C_FLAGS` to fix it.
Allow to add watchpoints to variables for source debugging. For instance:
`breakpoint set variable var`
will pause WAMR execution when the address at var is written to.
Can also set read/write watchpoints by passing r/w flags. This will pause
execution when the address at var is read:
`watchpoint set variable -w read var`
Add two linked lists for read/write watchpoints. When the debug message
handler receives a watchpoint request, it adds/removes to one/both of these
lists. In the interpreter, when an address is read or stored to, check whether
the address is in these lists. If so, throw a sigtrap and suspend the process.
When a wasm module is duplicated instantiated with wasm_instance_new,
the function import info of the previous instantiation may be overwritten by
the later instantiation, which may cause unexpected behavior.
Store the function import info into the module instance to fix the issue.
This PR allows reusing thread ids once they are released. That is done by using
a stack data structure to keep track of the used ids.
When a thread is created, it takes an available identifier from the stack. When
the thread exits, it returns the id to the stack of available identifiers.
Implement 2-level Multi-tier JIT engine: tier-up from Fast JIT to LLVM JIT to
get quick cold startup by Fast JIT and better performance by gradually
switching to LLVM JIT when the LLVM JIT functions are compiled by the
backend threads.
Refer to:
https://github.com/bytecodealliance/wasm-micro-runtime/issues/1302
For now this implementation uses thread manager.
Not sure whether thread manager is needed in that case. In the future there'll be likely another syscall added (for pthread_exit) and for that we might need some kind of thread management - with that in mind, we keep thread manager for now and will refactor this later if needed.
Error was reported when building docker image:
/usr/bin/ld: libaotclib.a(aot_llvm_extra.cpp.o): relocation R_X86_64_32S against symbol
`_ZN4llvm30TargetTransformInfoWrapperPass2IDE' can not be used when making a PIE object;
recompile with -fPIC
Add `-fPIC` to `CMAKE_CXX_FLAGS` and `CMAKE_SHARED_LIBRARY_LINK_C_FLAGS` to fix it.
Allow to add watchpoints to variables for source debugging. For instance:
`breakpoint set variable var`
will pause WAMR execution when the address at var is written to.
Can also set read/write watchpoints by passing r/w flags. This will pause
execution when the address at var is read:
`watchpoint set variable -w read var`
Add two linked lists for read/write watchpoints. When the debug message
handler receives a watchpoint request, it adds/removes to one/both of these
lists. In the interpreter, when an address is read or stored to, check whether
the address is in these lists. If so, throw a sigtrap and suspend the process.
When a wasm module is duplicated instantiated with wasm_instance_new,
the function import info of the previous instantiation may be overwritten by
the later instantiation, which may cause unexpected behavior.
Store the function import info into the module instance to fix the issue.
Enable bulk memory by default since it is a finished wasm spec proposal
and is enabled by default in latest wasi-sdk. Developer often encounters
"invalid section id" or "unsupported opcode" error if it isn't enabled.
Use sha256 to hash binary file content. If the incoming wasm binary is
cached before, wasm_module_new() simply returns the existed one.
Use -DWAMR_BUILD_WASM_CACHE=0/1 to control the feature.
OpenSSL 1.1.1 is required if the feature is enabled.
Record the store number of current thread with struct thread_local_stores
or tls thread_local_stores_num to fix the issue:
- Only call wasm_runtime_init_thread_env() in the first wasm_store_new of
current thread
- Only call wasm_runtime_destroy_thread_env() in the last wasm_store_delete
of current thread
And remove the unused store list in the engine.
