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60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
3 years ago
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// SPDX-License-Identifier: LGPL-3.0-or-later
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/**
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* \file sys/dbg.h
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*
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* Debugging utilities to retrieve stack trace and symbol names.
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*
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* \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
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* \author Lorenzo Cogotti
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*/
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#ifndef DF_SYS_DBG_H_
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#define DF_SYS_DBG_H_
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#include "sys/con.h"
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/// Helper union to cast `void *` to function pointer - be sad if you use it.
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typedef union {
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void *sym; ///< Function as a `void *`
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void (*func)(void); ///< Function pointer.
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} Funsym;
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STATIC_ASSERT(sizeof(void *) == sizeof(void (*)(void)), "Ill-formed Funsym for target platform");
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/// Test whether the current process is being executed under a debugger.
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Boolean Sys_IsDebuggerPresent(void);
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/**
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* \brief Get a symbol's name, if available.
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*
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* \param [in] sym Symbol whose name is needed.
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*
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* \return A pointer to a statically allocated thread-local buffer containing
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* a `\0` terminated symbol name on success, `NULL` if no name could be
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* retrieved.
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*/
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char *Sys_GetSymbolName(void *sym);
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/**
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* \brief Dump at most `n` backtrace entries to `dest`.
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*
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* Returned backtrace does not include `Sys_GetBacktrace()`
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* itself, and has the caller as the topmost symbol.
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*
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* \return Number of entries actually returned to `dest` on success,
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* 0 when no backtrace information is available.
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*/
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size_t Sys_GetBacktrace(void **dest, size_t n);
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/**
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* \brief Get the caller's caller.
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*
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* Useful for quick debugging:
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* ```c
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* printf("Called by: %s\n", Sys_GetSymbolName(Sys_GetCaller()));
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* ```
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*/
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void *Sys_GetCaller(void);
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/// Dump backtrace to console (typically `STDERR`).
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void Sys_DumpBacktrace(ConHn hn, void **trace, size_t n);
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#endif
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