Commit 4ac93a53 by Yinghai Lu Committed by Tianqi Chen

Fix a multithreaded bug in llvm LazyInitJIT (#3158)

parent 9089e196
...@@ -6,9 +6,9 @@ ...@@ -6,9 +6,9 @@
* to you under the Apache License, Version 2.0 (the * to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance * "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at * with the License. You may obtain a copy of the License at
* *
* http://www.apache.org/licenses/LICENSE-2.0 * http://www.apache.org/licenses/LICENSE-2.0
* *
* Unless required by applicable law or agreed to in writing, * Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an * software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
...@@ -226,8 +226,10 @@ class LLVMModuleNode final : public runtime::ModuleNode { ...@@ -226,8 +226,10 @@ class LLVMModuleNode final : public runtime::ModuleNode {
private: private:
void LazyInitJIT() { void LazyInitJIT() {
CHECK(ee_ == nullptr);
std::lock_guard<std::mutex> lock(mutex_); std::lock_guard<std::mutex> lock(mutex_);
if (ee_) {
return;
}
llvm::EngineBuilder builder(std::move(module_)); llvm::EngineBuilder builder(std::move(module_));
std::string triple, mcpu, mattr; std::string triple, mcpu, mattr;
llvm::TargetOptions opt; llvm::TargetOptions opt;
......
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