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, imageID, 44 &lookupContext); 45 if (error != B_OK) { 46 fprintf(stderr, "%s: Failed to create symbol lookup context " 47 "for team %ld: %s\n", kCommandName, owner, strerror(error)); 48 return error; 49 } 50 51 // TODO: Creating a symbol lookup just for loading the symbols of a single 52 // image is unnecessarily expensive. 53 54 // create a symbol iterator 55 debug_symbol_iterator* iterator; 56 error = debug_create_image_symbol_iterator(lookupContext, imageID, 57 &iterator); 58 if (error != B_OK) { 59 fprintf(stderr, "Failed to init symbol iterator for image %ld: %s\n", 60 imageID, strerror(error)); 61 debug_delete_symbol_lookup_context(lookupContext); 62 return error; 63 } 64 65 // init 66 error = _Init(iterator); 67 68 // cleanup 69 debug_delete_symbol_iterator(iterator); 70 debug_delete_symbol_lookup_context(lookupContext); 71 72 return error; 73 } 74 75 76 status_t 77 SharedImage::Init(const char* path) 78 { 79 // create a symbol iterator 80 debug_symbol_iterator* iterator; 81 status_t error = debug_create_file_symbol_iterator(path, &iterator); 82 if (error != B_OK) { 83 fprintf(stderr, "Failed to init symbol iterator for \"%s\": %s\n", 84 path, strerror(error)); 85 return error; 86 } 87 88 error = _Init(iterator); 89 90 debug_delete_symbol_iterator(iterator); 91 92 return error; 93 } 94 95 96 int32 97 SharedImage::FindSymbol(addr_t address) const 98 { 99 // binary search the function 100 int32 lower = 0; 101 int32 upper = fSymbolCount; 102 103 while (lower < upper) { 104 int32 mid = (lower + upper) / 2; 105 if (address >= fSymbols[mid]->base + fSymbols[mid]->size) 106 lower = mid + 1; 107 else 108 upper = mid; 109 } 110 111 if (lower == fSymbolCount) 112 return -1; 113 114 const Symbol* symbol = fSymbols[lower]; 115 if (address >= symbol->base && address < symbol->base + symbol->size) 116 return lower; 117 return -1; 118 } 119 120 121 status_t 122 SharedImage::_Init(debug_symbol_iterator* iterator) 123 { 124 // get an image info 125 status_t error = debug_get_symbol_iterator_image_info(iterator, &fInfo); 126 if (error != B_OK) 127 return error; 128 129 // iterate through the symbols 130 BObjectList<Symbol> symbols(512, true); 131 char symbolName[1024]; 132 int32 symbolType; 133 void* symbolLocation; 134 size_t symbolSize; 135 while (debug_next_image_symbol(iterator, symbolName, sizeof(symbolName), 136 &symbolType, &symbolLocation, &symbolSize) == B_OK) { 137 // printf(" %s %p (%6lu) %s\n", 138 // symbolType == B_SYMBOL_TYPE_TEXT ? "text" : "data", 139 // symbolLocation, symbolSize, symbolName); 140 if (symbolSize > 0 && symbolType == B_SYMBOL_TYPE_TEXT) { 141 Symbol* symbol = new(std::nothrow) Symbol(this, 142 (addr_t)symbolLocation, symbolSize, symbolName); 143 if (symbol == NULL || !symbols.AddItem(symbol)) { 144 delete symbol; 145 fprintf(stderr, "%s: Out of memory\n", kCommandName); 146 return B_NO_MEMORY; 147 } 148 } 149 } 150 151 // sort the symbols 152 fSymbolCount = symbols.CountItems(); 153 fSymbols = new(std::nothrow) Symbol*[fSymbolCount]; 154 if (fSymbols == NULL) 155 return B_NO_MEMORY; 156 157 for (int32 i = fSymbolCount - 1; i >= 0 ; i--) 158 fSymbols[i] = symbols.RemoveItemAt(i); 159 160 std::sort(fSymbols, fSymbols + fSymbolCount, SymbolComparator()); 161 162 return B_OK; 163 } 164