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Kernel: Allocate version string in the Process::initialize() method

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Instead of allocating a KString on each uname syscall, just allocate
during boot so we never have to worry about heap allocation in that
syscall.
This commit is contained in:
Liav A 2023-07-20 21:34:15 +03:00 • committed by Andrew Kaster
parent d8b514873f
commit 58b509584a
2 changed files with 9 additions and 2 deletions
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5
Kernel/Tasks/Process.cpp
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@ -40,6 +40,7 @@
#include <Kernel/Tasks/Thread.h>
#include <Kernel/Tasks/ThreadTracer.h>
#include <Kernel/Time/TimerQueue.h>
#include <Kernel/Version.h>
namespace Kernel {
@ -47,6 +48,7 @@ static void create_signal_trampoline();
extern ProcessID g_init_pid;
extern bool g_in_system_shutdown;
extern KString* g_version_string;
RecursiveSpinlock<LockRank::None> g_profiling_lock {};
static Atomic<pid_t> next_pid;
@ -162,6 +164,9 @@ UNMAP_AFTER_INIT void Process::initialize()
// Note: This is called before scheduling is initialized, and before APs are booted.
// So we can "safely" bypass the lock here.
reinterpret_cast<FixedStringBuffer<UTSNAME_ENTRY_LEN - 1>&>(hostname()).store_characters("courage"sv);
// NOTE: Just allocate the kernel version string here so we never have to worry
// about OOM conditions in the uname syscall.
g_version_string = MUST(KString::formatted("{}.{}-dev", SERENITY_MAJOR_REVISION, SERENITY_MINOR_REVISION)).leak_ptr();
create_signal_trampoline();
}