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DynamicLoader: Call libc's exit when exitting, to flush standard streams

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Sahan Fernando 2020-12-24 23:06:59 +11:00 committed by Andreas Kling
parent 12f214e2f0
commit bcecd2fa2f
Notes: sideshowbarker 2024-07-19 00:38:20 +09:00 
Author: https://github.com/ccapitalK
Commit: https://github.com/SerenityOS/serenity/commit/bcecd2fa2fa
Pull-request: https://github.com/SerenityOS/serenity/pull/4518
1 changed files with 14 additions and 4 deletions
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18
Userland/DynamicLoader/main.cpp
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@ -61,9 +61,13 @@ char* __static_environ[] = { nullptr }; // We don't get the environment without
static HashMap<String, NonnullRefPtr<ELF::DynamicLoader>> g_loaders;
static HashMap<String, NonnullRefPtr<ELF::DynamicObject>> g_loaded_objects;
using MainFunction = int (*)(int, char**, char**);
using LibCExitFunction = void (*)(int);
static size_t g_current_tls_offset = 0;
static size_t g_total_tls_size = 0;
static char** g_envp = nullptr;
static LibCExitFunction g_libc_exit = nullptr;
static void init_libc()
{
@ -208,6 +212,10 @@ static void initialize_libc()
ASSERT(res.found);
*((bool*)res.address) = false;
res = global_symbol_lookup("exit");
ASSERT(res.found);
g_libc_exit = (LibCExitFunction)res.address;
res = global_symbol_lookup("__libc_init");
ASSERT(res.found);
typedef void libc_init_func();
@ -262,7 +270,7 @@ static FlatPtr loader_main(auxv_t* auxvp)
VERBOSE("loaded all dependencies");
for ([[maybe_unused]] auto& lib : g_loaders) {
VERBOSE("%s - tls size: $u, tls offset: %u", lib.key.characters(), lib.value->tls_size(), lib.value->tls_offset());
VERBOSE("%s - tls size: %u, tls offset: %u", lib.key.characters(), lib.value->tls_size(), lib.value->tls_offset());
}
allocate_tls();
@ -284,8 +292,6 @@ extern "C" {
// The compiler expects a previous declaration
void _start(int, char**, char**);
using MainFunction = int (*)(int, char**, char**);
void _start(int argc, char** argv, char** envp)
{
g_envp = envp;
@ -307,6 +313,10 @@ void _start(int argc, char** argv, char** envp)
VERBOSE("jumping to main program entry point: %p", main_function);
int rc = main_function(argc, argv, envp);
VERBOSE("rc: %d", rc);
_exit(rc);
if (g_libc_exit != nullptr) {
g_libc_exit(rc);
} else {
_exit(rc);
}
}
}