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Fix crash caused by ggml_backend_load_all when launching on Android Activity (llama/10812)

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* Fix crash caused by ggml_backend_load_all when launching on AndroidActivity.

Details:
Calling ggml_backend_load_all during initialization in the AndroidActivity project leads to a crash with the error:
terminating with uncaught exception of type std::__ndk1::__fs::filesystem::filesystem_error: filesystem error: in directory_iterator::directory_iterator(...): Permission denied [./].
This issue occurs because AndroidActivity restricts file access due to sandboxing.

Reproduction:
In the example folder, the LlamaAndroid project can reproduce the crash by calling ggml_backend_load_all first in Java_android_llama_cpp_LLamaAndroid_backend_1init.

* Update ggml/src/ggml-backend-reg.cpp

---------

Co-authored-by: Diego Devesa <slarengh@gmail.com>
This commit is contained in:
谢乃闻 2024-12-13 12:56:07 +00:00 committed by Georgi Gerganov
parent c21fb10b28
commit 2c05efa4b1
1 changed files with 2 additions and 1 deletions
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ggml/src/ggml-backend-reg.cpp
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@ -473,7 +473,8 @@ static ggml_backend_reg_t ggml_backend_load_best(const char * name, bool silent,
if (!fs::exists(search_path)) {
continue;
}
for (const auto & entry : fs::directory_iterator(search_path)) {
fs::directory_iterator dir_it(search_path, fs::directory_options::skip_permission_denied);
for (const auto & entry : dir_it) {
if (entry.is_regular_file()) {
std::string filename = entry.path().filename().string();
std::string ext = entry.path().extension().string();