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Keep thread name after attaching it to JVM #1713

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Merged
rustam-gamidov-here merged 1 commit into from
Jul 14, 2026
+19 −2
Merged

Keep thread name after attaching it to JVM #1713

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21 changes: 19 additions & 2 deletions olp-cpp-sdk-core/src/http/android/utils/JNIThreadBinder.h
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (C) 2019 HERE Europe B.V.
* Copyright (C) 2019-2026 HERE Europe B.V.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
Expand All @@ -22,6 +22,7 @@
#ifdef __ANDROID__

#include <jni.h>
#include <sys/prctl.h>

namespace olp {
namespace http {
Expand All @@ -35,7 +36,9 @@ class JNIThreadBinder final {
: attached_(false), jni_env_(nullptr), jni_vm_(vm) {
if (jni_vm_->GetEnv(reinterpret_cast<void**>(&jni_env_), JNI_VERSION_1_6) !=
JNI_OK) {
if (jni_vm_->AttachCurrentThread(&jni_env_, nullptr) == JNI_OK) {
captureThreadName();
auto attachArgs = getJvmAttachArgs();
if (jni_vm_->AttachCurrentThread(&jni_env_, &attachArgs) == JNI_OK) {
attached_ = true;
}
}
Expand All @@ -56,9 +59,23 @@ class JNIThreadBinder final {
JNIEnv* GetEnv() const { return jni_env_; }

private:
void captureThreadName() {
if (prctl(PR_GET_NAME, threadName_) != 0) {
threadName_[0] = '\0';
}
}

JavaVMAttachArgs getJvmAttachArgs() const {
return JavaVMAttachArgs{.version = JNI_VERSION_1_6,
.name = threadName_[0] ? threadName_ : nullptr,
.group = nullptr};
}

bool attached_;
JNIEnv* jni_env_;
JavaVM* jni_vm_;
constexpr static size_t kThreadNameMaxLength = 16;
char threadName_[kThreadNameMaxLength] = {0};
};

} // namespace utils
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