moreaddrtosym.h

MPI stands for the Message Passing Interface. Written by the MPI Forum (a large committee comprising

/*
	File:		MoreAddrToSym.h

	Contains:	Code for mapping addresses to their symbolic names.

	Written by:	DTS

	Copyright:	Copyright (c) 2006 by Apple Computer, Inc., All Rights Reserved.

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	Change History (most recent first):

$Log: MoreAddrToSym.h,v $
Revision 1.2  2006/01/22 22:47:15  eskimo1
Significant rewrite to account for changes in MoreBacktrace.  Still not as functional as I'd like.

Revision 1.1  2003/04/04 15:03:00  eskimo1
First checked in.  This code still has bugs, but I've written enough code that checking in is a good idea.


*/

#pragma once

/////////////////////////////////////////////////////////////////

// MoreIsBetter Setup

#include "MoreSetup.h"

// Mac OS Interfaces

#include <stdint.h>
#include <stdlib.h>

/////////////////////////////////////////////////////////////////

#ifdef __cplusplus
extern "C" {
#endif

// IMPORTANT:
// This code is currently broken in two ways:
// 
// o If the binary has debugging symbols, you often get a debugging 
//   symbol rather than a real symbol.  I believe this is caused by 
//   handling of N_FUN in the GetFunctionName routine.  Furthermore, 
//   I believe that it did work previous but something changed in the 
//   Mach-O headers to break it.  This warrants serious investigation. 
//
//   You can work around this problem by removing the debug symbols 
//   using:
//
//   $ strip -S YourBinaryName
//
// o It doesn't handle 64-bit Mach-O binaries.  This is a simple 
//   limitation of the code, and it should be relatively easy to fix.
//
// I intend to fix both of these problems with a future rewrite.  
// Until then, I've decided to live with them.

typedef uint64_t MoreAToSAddr;
typedef uint64_t MoreAToSOffset;

enum MoreAToSSymbolType {
	kMoreAToSNoSymbol = 0,
	kMoreAToSDyldPubliSymbol,
	kMoreAToSDyldPrivateSymbol
};
typedef enum MoreAToSSymbolType MoreAToSSymbolType;

struct MoreAToSSymInfo {
	MoreAToSSymbolType	symbolType;
	const char *		symbolName;
	MoreAToSOffset		symbolOffset;
};
typedef struct MoreAToSSymInfo MoreAToSSymInfo;

extern int  MoreAToSCreate(size_t count, MoreAToSSymInfo *symbols[]);
	// Creates a blank MoreAToSSymInfo array with count entries.
	// You must dispose of it using MoreAToSDestroy.
	// 
	// symbols must not be NULL
	// *symbols must be NULL
	// Returns 0 on success, an errno-style error code otherwise
	// On success, *symbols will not be NULL
	// On error, *symbols will be NULL
	
extern void MoreAToSDestroy(size_t count, MoreAToSSymInfo symbols[]);
	// Destroys a MoreAToSDestroy array (blank or filled in) of 
	// count entries.

extern int MoreAToSCopySymbolNamesUsingDyld(
	size_t			count, 
	MoreAToSAddr 	addresses[],
	MoreAToSSymInfo symbols[]
);
	// Given count values in the addresses array, works out the symbolic 
	// information for those values and returns it in the symbols array. 
	//
	// Returns 0 on success, an errno-style error code otherwise
	//
	// Note that not being able to map an address to a symbol is not 
	// considered an error.  Rather, you get NULL back in the symbolName
	// field of the corresponding symbols array element.

#ifdef __cplusplus
}
#endif