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[clang-repl] Add support for running custom code in Remote JIT executor #157358

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Merged
merged 7 commits into from
Sep 13, 2025
Merged

[clang-repl] Add support for running custom code in Remote JIT executor #157358

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4410aeb
[clang-repl] Adding custom lambda in launchExecutor
Sep 7, 2025
0a09e01
Formatting changes
Sep 7, 2025
268826a
Formatting changes & fixing bug
Sep 7, 2025
cf4c876
Removing extra arg from sharedMem
Sep 7, 2025
df67ed1
ClangRepl Interpreter test for out-of-process
Sep 12, 2025
4ef0b03
Merge branch 'main' into launchExec-lambda
kr-2003 Sep 12, 2025
d7f67d0
Formatting changes
Sep 13, 2025
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4 changes: 3 additions & 1 deletion clang/include/clang/Interpreter/Interpreter.h
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Original file line number Diff line number Diff line change
Expand Up @@ -135,11 +135,13 @@ class Interpreter {
std::string OrcRuntimePath = "";
/// PID of the out-of-process JIT executor.
uint32_t ExecutorPID = 0;
/// Custom lambda to be executed inside child process/executor
std::function<void()> CustomizeFork = nullptr;

JITConfig()
: IsOutOfProcess(false), OOPExecutor(""), OOPExecutorConnect(""),
UseSharedMemory(false), SlabAllocateSize(0), OrcRuntimePath(""),
ExecutorPID(0) {}
ExecutorPID(0), CustomizeFork(nullptr) {}
};

protected:
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6 changes: 5 additions & 1 deletion clang/lib/Interpreter/IncrementalExecutor.cpp
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Expand Up @@ -172,7 +172,8 @@ createSharedMemoryManager(llvm::orc::SimpleRemoteEPC &SREPC,
llvm::Expected<std::pair<std::unique_ptr<llvm::orc::SimpleRemoteEPC>, uint32_t>>
IncrementalExecutor::launchExecutor(llvm::StringRef ExecutablePath,
bool UseSharedMemory,
unsigned SlabAllocateSize) {
unsigned SlabAllocateSize,
std::function<void()> CustomizeFork) {
#ifndef LLVM_ON_UNIX
// FIXME: Add support for Windows.
return llvm::make_error<llvm::StringError>(
Expand Down Expand Up @@ -215,6 +216,9 @@ IncrementalExecutor::launchExecutor(llvm::StringRef ExecutablePath,
close(ToExecutor[WriteEnd]);
close(FromExecutor[ReadEnd]);

if (CustomizeFork)
CustomizeFork();

// Execute the child process.
std::unique_ptr<char[]> ExecutorPath, FDSpecifier;
{
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3 changes: 2 additions & 1 deletion clang/lib/Interpreter/IncrementalExecutor.h
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Expand Up @@ -79,7 +79,8 @@ class IncrementalExecutor {
static llvm::Expected<
std::pair<std::unique_ptr<llvm::orc::SimpleRemoteEPC>, uint32_t>>
launchExecutor(llvm::StringRef ExecutablePath, bool UseSharedMemory,
unsigned SlabAllocateSize);
unsigned SlabAllocateSize,
std::function<void()> CustomizeFork = nullptr);

#if LLVM_ON_UNIX && LLVM_ENABLE_THREADS
static llvm::Expected<std::unique_ptr<llvm::orc::SimpleRemoteEPC>>
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3 changes: 2 additions & 1 deletion clang/lib/Interpreter/Interpreter.cpp
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Expand Up @@ -355,7 +355,8 @@ Interpreter::outOfProcessJITBuilder(JITConfig Config) {
if (!Config.OOPExecutor.empty()) {
// Launch an out-of-process executor locally in a child process.
auto ResultOrErr = IncrementalExecutor::launchExecutor(
Config.OOPExecutor, Config.UseSharedMemory, Config.SlabAllocateSize);
Config.OOPExecutor, Config.UseSharedMemory, Config.SlabAllocateSize,
Config.CustomizeFork);
if (!ResultOrErr)
return ResultOrErr.takeError();
childPid = ResultOrErr->second;
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