1 /* 2 * Copyright 2008-2009, Ingo Weinhold, ingo_weinhold@gmx.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 7 #include "SharedImage.h" 8 9 #include <stdio.h> 10 11 #include <algorithm> 12 #include <new> 13 14 #include <debug_support.h> 15 #include <ObjectList.h> 16 17 #include "Options.h" 18 19 20 SharedImage::SharedImage() 21 : 22 fSymbols(NULL), 23 fSymbolCount(0) 24 { 25 } 26 27 28 SharedImage::~SharedImage() 29 { 30 if (fSymbols != NULL) { 31 for (int32 i = 0; i < fSymbolCount; i++) 32 delete fSymbols[i]; 33 delete[] fSymbols; 34 } 35 } 36 37 38 status_t 39 SharedImage::Init(team_id owner, image_id imageID) 40 { 41 // we need a temporary symbol lookup context 42 debug_symbol_lookup_context* lookupContext; 43 status_t error = debug_create_symbol_lookup_context(owner, &lookupContext); 44 if (error != B_OK) { 45 fprintf(stderr, "%s: Failed to create symbol lookup context " 46 "for team %ld: %s\n", kCommandName, owner, strerror(error)); 47 return error; 48 } 49 50 // TODO: Creating a symbol lookup just for loading the symbols of a single 51 // image is unnecessarily expensive. 52 53 // create a symbol iterator 54 debug_symbol_iterator* iterator; 55 error = debug_create_image_symbol_iterator(lookupContext, imageID, 56 &iterator); 57 if (error != B_OK) { 58 fprintf(stderr, "Failed to init symbol iterator: %s\n", 59 strerror(error)); 60 return error; 61 } 62 63 // init 64 error = _Init(iterator); 65 66 // cleanup 67 debug_delete_symbol_iterator(iterator); 68 debug_delete_symbol_lookup_context(lookupContext); 69 70 return error; 71 } 72 73 74 status_t 75 SharedImage::Init(const char* path) 76 { 77 // create a symbol iterator 78 debug_symbol_iterator* iterator; 79 status_t error = debug_create_file_symbol_iterator(path, &iterator); 80 if (error != B_OK) { 81 fprintf(stderr, "Failed to init symbol iterator: %s\n", 82 strerror(error)); 83 return error; 84 } 85 86 error = _Init(iterator); 87 88 debug_delete_symbol_iterator(iterator); 89 90 return error; 91 } 92 93 94 int32 95 SharedImage::FindSymbol(addr_t address) const 96 { 97 // binary search the function 98 int32 lower = 0; 99 int32 upper = fSymbolCount; 100 101 while (lower < upper) { 102 int32 mid = (lower + upper) / 2; 103 if (address >= fSymbols[mid]->base + fSymbols[mid]->size) 104 lower = mid + 1; 105 else 106 upper = mid; 107 } 108 109 if (lower == fSymbolCount) 110 return -1; 111 112 const Symbol* symbol = fSymbols[lower]; 113 if (address >= symbol->base && address < symbol->base + symbol->size) 114 return lower; 115 return -1; 116 } 117 118 119 status_t 120 SharedImage::_Init(debug_symbol_iterator* iterator) 121 { 122 // get an image info 123 status_t error = debug_get_symbol_iterator_image_info(iterator, &fInfo); 124 if (error != B_OK) 125 return error; 126 127 // iterate through the symbols 128 BObjectList<Symbol> symbols(512, true); 129 char symbolName[1024]; 130 int32 symbolType; 131 void* symbolLocation; 132 size_t symbolSize; 133 while (debug_next_image_symbol(iterator, symbolName, sizeof(symbolName), 134 &symbolType, &symbolLocation, &symbolSize) == B_OK) { 135 // printf(" %s %p (%6lu) %s\n", 136 // symbolType == B_SYMBOL_TYPE_TEXT ? "text" : "data", 137 // symbolLocation, symbolSize, symbolName); 138 if (symbolSize > 0 && symbolType == B_SYMBOL_TYPE_TEXT) { 139 Symbol* symbol = new(std::nothrow) Symbol(this, 140 (addr_t)symbolLocation, symbolSize, symbolName); 141 if (symbol == NULL || !symbols.AddItem(symbol)) { 142 delete symbol; 143 fprintf(stderr, "%s: Out of memory\n", kCommandName); 144 debug_delete_symbol_iterator(iterator); 145 return B_NO_MEMORY; 146 } 147 } 148 } 149 150 // sort the symbols 151 fSymbolCount = symbols.CountItems(); 152 fSymbols = new(std::nothrow) Symbol*[fSymbolCount]; 153 if (fSymbols == NULL) 154 return B_NO_MEMORY; 155 156 for (int32 i = fSymbolCount - 1; i >= 0 ; i--) 157 fSymbols[i] = symbols.RemoveItemAt(i); 158 159 std::sort(fSymbols, fSymbols + fSymbolCount, SymbolComparator()); 160 161 return B_OK; 162 } 163