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https://github.com/RGBCube/serenity
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08cd75ac4b
After reading a bunch of POSIX specs, I've learned that a file descriptor is the number that refers to a file description, not the description itself. So this patch renames FileDescriptor to FileDescription, and Process now has FileDescription* file_description(int fd).
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#include <AK/CircularQueue.h>
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#include <Kernel/File.h>
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#include <Kernel/UnixTypes.h>
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class ProcessTracer : public File {
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public:
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static Retained<ProcessTracer> create(pid_t pid) { return adopt(*new ProcessTracer(pid)); }
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virtual ~ProcessTracer() override;
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bool is_dead() const { return m_dead; }
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void set_dead() { m_dead = true; }
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virtual bool can_read(FileDescription&) const override { return !m_calls.is_empty() || m_dead; }
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virtual int read(FileDescription&, byte*, int) override;
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virtual bool can_write(FileDescription&) const override { return true; }
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virtual int write(FileDescription&, const byte*, int) override { return -EIO; }
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virtual String absolute_path(const FileDescription&) const override;
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void did_syscall(dword function, dword arg1, dword arg2, dword arg3, dword result);
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pid_t pid() const { return m_pid; }
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private:
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virtual const char* class_name() const override { return "ProcessTracer"; }
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explicit ProcessTracer(pid_t);
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struct CallData {
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dword function;
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dword arg1;
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dword arg2;
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dword arg3;
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dword result;
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};
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pid_t m_pid;
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bool m_dead { false };
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CircularQueue<CallData, 200> m_calls;
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};
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