Move header files to dwarfinterpret/
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#pragma once
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#include <string>
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#include <memory>
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#include <cstdint>
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#include <dwarfpp/lib.hpp>
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#include <dwarfpp/regs.hpp>
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#include <dwarfpp/frame.hpp>
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#include <dwarfpp/attr.hpp>
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#include <dwarfpp/frame.hpp>
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#include <dwarfpp/root.hpp>
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#define OF_WHAT_EXCEPTION(cl_name) \
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cl_name: public WhatException { \
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public:\
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cl_name(const std::string& what): WhatException(what) {} \
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cl_name() = default; \
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}
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class DwarfInterpret {
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/** Singleton class holding a Dwarf interpret.
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* Must be first instanciated with the path to the binary being run, with a
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* call to `instanciate`, and can afterwards be accessed with calls to
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* `acquire`.
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*/
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public: // Types, sub-classes, …
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class WhatException: public std::exception {
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/** Base exception for other exceptions, not supposed to be thrown
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* by itself */
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std::string what_str;
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public:
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/// Initialize the exception with an explanatory text chunk
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explicit WhatException(const std::string& what)
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: what_str(what) {}
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/// Leave the explanatory text empty
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WhatException(): what_str("") {}
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/// Get the explanatory text for this exception
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const char* what() const noexcept {
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return what_str.c_str();
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}
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};
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/// Thrown when `acquire` is called before `instanciate`
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class OF_WHAT_EXCEPTION(NotInstanciated);
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/// Thrown when `instanciate` is called twice
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class OF_WHAT_EXCEPTION(AlreadyInstanciated);
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/** Thrown when trying to get the value of a Dwarf register (column)
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* that is not defined or has, somehow, no value at this PC. */
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class OF_WHAT_EXCEPTION(ValuelessRegister);
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/// Thrown when accessing unimplemented parts of this library
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class OF_WHAT_EXCEPTION(NotImplemented);
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/// Thrown when somehow, getcontext (read CPU registers) fails
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class OF_WHAT_EXCEPTION(FailedGetContext);
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/// Thrown when a Dwarf element is not found for a given PC
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class OF_WHAT_EXCEPTION(NotFound);
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/// A Dwarf register
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typedef dwarf::core::FrameSection::register_def DwarfRegister;
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/// A Dwarf row of registers (for a given PC)
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typedef std::set<std::pair<int, DwarfRegister> > DwarfRow;
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/// The value type of a register's contents
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typedef uintptr_t reg_content_t;
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public: // methods
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DwarfInterpret(DwarfInterpret const&) = delete;
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void operator=(DwarfInterpret const&) = delete;
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/** Acquire the instance of `DwarfInterpret`. The method #instanciate
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* must have been called beforehand.
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*
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* \throws NotInstanciated whenever this condition is not met.
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*/
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static DwarfInterpret& acquire();
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/** Instanciate the instance of DwarfInterpret with the path to the
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* program currently running (usually, argv[0])
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*
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* \throws AlreadyInstanciated if this method is called twice. */
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static DwarfInterpret& instanciate(const std::string& elf_path);
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/// Returns the ELF machine number for this ELF
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int get_elf_machine() const { return elf_machine; }
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/** Retrieves the value pointed to by the given Dwarf register
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*
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* \throws ValuelessRegister */
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reg_content_t interpret_dw_register(
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const DwarfRow& row,
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const DwarfRegister& reg
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) const;
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/** Retrieves the value pointed to by the given Dwarf register
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*
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* \throws ValuelessRegister */
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reg_content_t interpret_dw_register(
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const DwarfRow& row,
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int reg_id
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) const;
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/** Get the return address at a given program counter, assuming the
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* correct registers are stored */
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uintptr_t get_return_address(uintptr_t cur_pc) const;
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/** Get the return address of the current program point */
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uintptr_t get_self_return_address() const;
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/// Get the current program counter
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static uintptr_t get_current_pc();
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private:
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DwarfInterpret(const std::string& elf_path);
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DwarfRegister get_column(const DwarfRow& row, int column) const;
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reg_content_t get_cpu_register(int reg_id) const;
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const dwarf::core::FrameSection::fde_iterator fde_at(
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uintptr_t pc) const;
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const dwarf::core::FrameSection::cie_iterator cie_at(
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uintptr_t pc) const;
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const DwarfRow& dwarf_row_at(uintptr_t pc) const;
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uintptr_t get_caller_pc() const;
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private: // members
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static std::unique_ptr<DwarfInterpret> instance;
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dwarf::core::root_die root_die;
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int elf_machine;
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friend class std::unique_ptr<DwarfInterpret>;
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};
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#include <dwarfinterpret/DwarfInterpret.hpp>
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#include <dwarfinterpret/MemoryMap.hpp>
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@ -0,0 +1,147 @@
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#pragma once
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#include <string>
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#include <memory>
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#include <cstdint>
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#include <dwarfpp/lib.hpp>
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#include <dwarfpp/regs.hpp>
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#include <dwarfpp/frame.hpp>
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#include <dwarfpp/attr.hpp>
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#include <dwarfpp/frame.hpp>
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#include <dwarfpp/root.hpp>
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#define OF_WHAT_EXCEPTION(cl_name) \
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cl_name: public WhatException { \
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public:\
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cl_name(const std::string& what): WhatException(what) {} \
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cl_name() = default; \
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}
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class DwarfInterpret {
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/** Singleton class holding a Dwarf interpret.
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* Must be first instanciated with the path to the binary being run, with a
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* call to `instanciate`, and can afterwards be accessed with calls to
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* `acquire`.
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*/
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public: // Types, sub-classes, …
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class WhatException: public std::exception {
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/** Base exception for other exceptions, not supposed to be thrown
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* by itself */
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std::string what_str;
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public:
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/// Initialize the exception with an explanatory text chunk
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explicit WhatException(const std::string& what)
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: what_str(what) {}
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/// Leave the explanatory text empty
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WhatException(): what_str("") {}
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/// Get the explanatory text for this exception
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const char* what() const noexcept {
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return what_str.c_str();
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}
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};
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/// Thrown when `acquire` is called before `instanciate`
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class OF_WHAT_EXCEPTION(NotInstanciated);
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/// Thrown when `instanciate` is called twice
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class OF_WHAT_EXCEPTION(AlreadyInstanciated);
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/** Thrown when trying to get the value of a Dwarf register (column)
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* that is not defined or has, somehow, no value at this PC. */
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class OF_WHAT_EXCEPTION(ValuelessRegister);
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/// Thrown when accessing unimplemented parts of this library
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class OF_WHAT_EXCEPTION(NotImplemented);
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/// Thrown when somehow, getcontext (read CPU registers) fails
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class OF_WHAT_EXCEPTION(FailedGetContext);
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/// Thrown when a Dwarf element is not found for a given PC
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class OF_WHAT_EXCEPTION(NotFound);
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/// A Dwarf register
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typedef dwarf::core::FrameSection::register_def DwarfRegister;
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/// A Dwarf row of registers (for a given PC)
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typedef std::set<std::pair<int, DwarfRegister> > DwarfRow;
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/// The value type of a register's contents
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typedef uintptr_t reg_content_t;
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public: // methods
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DwarfInterpret(DwarfInterpret const&) = delete;
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void operator=(DwarfInterpret const&) = delete;
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/** Acquire the instance of `DwarfInterpret`. The method #instanciate
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* must have been called beforehand.
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*
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* \throws NotInstanciated whenever this condition is not met.
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*/
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static DwarfInterpret& acquire();
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/** Instanciate the instance of DwarfInterpret with the path to the
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* program currently running (usually, argv[0])
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*
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* \throws AlreadyInstanciated if this method is called twice. */
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static DwarfInterpret& instanciate(const std::string& elf_path);
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/// Returns the ELF machine number for this ELF
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int get_elf_machine() const { return elf_machine; }
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/** Retrieves the value pointed to by the given Dwarf register
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*
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* \throws ValuelessRegister */
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reg_content_t interpret_dw_register(
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const DwarfRow& row,
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const DwarfRegister& reg
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) const;
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/** Retrieves the value pointed to by the given Dwarf register
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*
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* \throws ValuelessRegister */
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reg_content_t interpret_dw_register(
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const DwarfRow& row,
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int reg_id
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) const;
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/** Get the return address at a given program counter, assuming the
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* correct registers are stored */
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uintptr_t get_return_address(uintptr_t cur_pc) const;
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/** Get the return address of the current program point */
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uintptr_t get_self_return_address() const;
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/// Get the current program counter
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static uintptr_t get_current_pc();
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private:
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DwarfInterpret(const std::string& elf_path);
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DwarfRegister get_column(const DwarfRow& row, int column) const;
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reg_content_t get_cpu_register(int reg_id) const;
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const dwarf::core::FrameSection::fde_iterator fde_at(
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uintptr_t pc) const;
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const dwarf::core::FrameSection::cie_iterator cie_at(
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uintptr_t pc) const;
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const DwarfRow& dwarf_row_at(uintptr_t pc) const;
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uintptr_t get_caller_pc() const;
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private: // members
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static std::unique_ptr<DwarfInterpret> instance;
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dwarf::core::root_die root_die;
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int elf_machine;
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friend class std::unique_ptr<DwarfInterpret>;
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};
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