Collaboration diagram for DwarfUnwinder:
Public Member Functions | |
| DwarfUnwinder (uintptr_t nData, size_t nLength) | |
| bool | unwind (const ProcessorState &inState, ProcessorState &outState, uintptr_t &frameBase) |
Static Public Member Functions | |
| static uint32_t | decodeUleb128 (uint8_t *pBase, uint32_t &nOffset) |
| static int32_t | decodeSleb128 (uint8_t *pBase, uint32_t &nOffset) |
Private Attributes | |
| uintptr_t | m_nData |
| size_t | m_nLength |
Detailed Description
Definition at line 29 of file DwarfUnwinder.h.
Constructor & Destructor Documentation
| DwarfUnwinder::DwarfUnwinder | ( | uintptr_t | nData, |
| size_t | nLength | ||
| ) |
Creates a DwarfUnwinder object defined by frame definitions at nData, which has a maximum size of nLength.
Definition at line 26 of file DwarfUnwinder.cc.
Member Function Documentation
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static |
Decodes a SLEB128 encoded number.
- Parameters
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[in] pBase A pointer, to which nOffset is added to find the SLEB string. [in,out] nOffset An offset to add to pBase to find the SLEB string. This is incremented by the function, and the function ends with it pointing to the byte after the SLEB number.
- Returns
- An integer representation of the SLEB128 number.
- See also
- DWARF specification v3.0, Appendix C.
Definition at line 363 of file DwarfUnwinder.cc.
Referenced by DwarfCfiAutomaton::executeInstruction(), and unwind().
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Decodes a ULEB128 encoded number.
- Parameters
-
[in] pBase A pointer, to which nOffset is added to find the ULEB string. [in,out] nOffset An offset to add to pBase to find the ULEB string. This is incremented by the function, and the function ends with it pointing to the byte after the ULEB number.
- Returns
- An integer representation of the ULEB128 number.
- See also
- DWARF specification v3.0, Appendix C.
Definition at line 348 of file DwarfUnwinder.cc.
Referenced by DwarfCfiAutomaton::executeInstruction(), and unwind().
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| bool DwarfUnwinder::unwind | ( | const ProcessorState & | inState, |
| ProcessorState & | outState, | ||
| uintptr_t & | frameBase | ||
| ) |
Populates outState with the result of unwinding one stack frame from inState.
- Parameters
-
[in] inState The starting state. [out] outState The state after one stack frame has been unwound.
- Returns
- False if the frame could not be unwound, true otherwise.
Definition at line 35 of file DwarfUnwinder.cc.
References decodeSleb128(), decodeUleb128(), DwarfCfiAutomaton::execute(), DwarfState::getRegister(), DwarfCfiAutomaton::initialise(), m_nData, m_nLength, and DwarfState::m_R.
Referenced by Backtrace::performDwarfBacktrace().
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Member Data Documentation
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private |
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private |
The documentation for this class was generated from the following files:
