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https://github.com/RGBCube/serenity
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Kernel: Make Process::current() return a Process& instead of Process*
This has several benefits: 1) We no longer just blindly derefence a null pointer in various places 2) We will get nicer runtime error messages if the current process does turn out to be null in the call location 3) GCC no longer complains about possible nullptr dereferences when compiling without KUBSAN
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1259dc3623
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cf271183b4
26 changed files with 142 additions and 141 deletions
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@ -214,14 +214,14 @@ static void dump(const RegisterState& regs)
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void handle_crash(RegisterState const& regs, char const* description, int signal, bool out_of_memory)
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{
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auto process = Process::current();
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if (!process) {
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if (!Process::has_current())
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PANIC("{} with !current", description);
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}
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auto& process = Process::current();
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// If a process crashed while inspecting another process,
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// make sure we switch back to the right page tables.
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MM.enter_process_paging_scope(*process);
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MM.enter_process_paging_scope(process);
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dmesgln("CRASH: CPU #{} {} in ring {}", Processor::id(), description, (regs.cs & 3));
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dump(regs);
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@ -230,7 +230,7 @@ void handle_crash(RegisterState const& regs, char const* description, int signal
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PANIC("Crash in ring 0");
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}
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process->crash(signal, regs.ip(), out_of_memory);
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process.crash(signal, regs.ip(), out_of_memory);
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}
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EH_ENTRY_NO_CODE(6, illegal_instruction);
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