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[RSYM]
* Speedup FindOrAddString(). Brought to you by Art Yerkes (arty). svn path=/trunk/; revision=59593
This commit is contained in:
Amine Khaldi
parent
6320fe5192
commit
f48c0269df
1 changed files with 113 additions and 32 deletions
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@ -33,6 +33,83 @@
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#define MAX_PATH 260
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#define MAX_SYM_NAME 2000
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struct StringEntry
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{
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struct StringEntry *Next;
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ULONG Offset;
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char *String;
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};
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struct StringHashTable
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{
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ULONG TableSize;
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struct StringEntry **Table;
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};
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/* This is the famous DJB hash */
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static unsigned int
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ComputeDJBHash(const char *name)
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{
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unsigned int val = 5381;
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int i = 0;
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for (i = 0; name[i]; i++)
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{
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val = (33 * val) + name[i];
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}
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return val;
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}
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static void
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AddStringToHash(struct StringHashTable *StringTable,
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unsigned int hash,
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ULONG Offset,
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char *StringPtr)
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{
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struct StringEntry *entry = calloc(1, sizeof(struct StringEntry));
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entry->Offset = Offset;
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entry->String = StringPtr;
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entry->Next = StringTable->Table[hash];
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StringTable->Table[hash] = entry;
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}
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static void
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StringHashTableInit(struct StringHashTable *StringTable,
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ULONG StringsLength,
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char *StringsBase)
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{
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char *Start = StringsBase;
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char *End = StringsBase + StringsLength;
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StringTable->TableSize = 1024;
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StringTable->Table = calloc(1024, sizeof(struct StringEntry *));
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while (Start < End)
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{
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AddStringToHash(StringTable,
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ComputeDJBHash(Start) % StringTable->TableSize,
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Start - StringsBase,
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Start);
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Start += strlen(Start) + 1;
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}
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}
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static void
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StringHashTableFree(struct StringHashTable *StringTable)
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{
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int i;
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struct StringEntry *entry;
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for (i = 0; i < StringTable->TableSize; i++)
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{
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while ((entry = StringTable->Table[i]))
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{
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entry = entry->Next;
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free(StringTable->Table[i]);
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StringTable->Table[i] = entry;
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}
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}
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free(StringTable->Table);
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}
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static int
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CompareSymEntry(const PROSSYM_ENTRY SymEntry1, const PROSSYM_ENTRY SymEntry2)
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{
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@ -112,26 +189,32 @@ GetCoffInfo(void *FileData, PIMAGE_FILE_HEADER PEFileHeader,
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}
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static ULONG
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FindOrAddString(char *StringToFind, ULONG *StringsLength, void *StringsBase)
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FindOrAddString(struct StringHashTable *StringTable,
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char *StringToFind,
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ULONG *StringsLength,
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void *StringsBase)
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{
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char *Search, *End;
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unsigned int hash = ComputeDJBHash(StringToFind) % StringTable->TableSize;
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struct StringEntry *entry = StringTable->Table[hash];
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Search = (char *)StringsBase;
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End = Search + *StringsLength;
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while (entry && strcmp(entry->String, StringToFind))
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entry = entry->Next;
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while (Search < End)
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if (entry)
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{
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if (strcmp(Search, StringToFind) == 0)
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{
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return Search - (char *)StringsBase;
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}
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Search += strlen(Search) + 1;
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return entry->Offset;
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}
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else
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{
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char *End = (char *)StringsBase + *StringsLength;
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strcpy(Search, StringToFind);
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*StringsLength += strlen(StringToFind) + 1;
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strcpy(End, StringToFind);
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*StringsLength += strlen(StringToFind) + 1;
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return Search - (char *)StringsBase;
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AddStringToHash(StringTable, hash, End - (char *)StringsBase, End);
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return End - (char *)StringsBase;
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}
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}
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static int
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@ -150,6 +233,7 @@ ConvertStabs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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ULONG NameLen;
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char FuncName[256];
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PROSSYM_ENTRY Current;
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struct StringHashTable StringHash;
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StabEntry = StabSymbolsBase;
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Count = StabSymbolsLength / sizeof(STAB_ENTRY);
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@ -171,6 +255,8 @@ ConvertStabs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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Current = *SymbolsBase;
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memset(Current, 0, sizeof(*Current));
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StringHashTableInit(&StringHash, *StringsLength, (char *)StringsBase);
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LastFunctionAddress = 0;
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for (i = 0; i < Count; i++)
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{
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@ -206,8 +292,8 @@ ConvertStabs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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First = 0;
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Current->Address = Address;
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}
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Current->FileOffset = FindOrAddString((char *)StabStringsBase
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+ StabEntry[i].n_strx,
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Current->FileOffset = FindOrAddString(&StringHash,
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(char *)StabStringsBase + StabEntry[i].n_strx,
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StringsLength,
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StringsBase);
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break;
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@ -236,7 +322,8 @@ ConvertStabs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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}
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memcpy(FuncName, Name, NameLen);
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FuncName[NameLen] = '\0';
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Current->FunctionOffset = FindOrAddString(FuncName,
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Current->FunctionOffset = FindOrAddString(&StringHash,
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FuncName,
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StringsLength,
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StringsBase);
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Current->SourceLine = 0;
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@ -265,6 +352,8 @@ ConvertStabs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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qsort(*SymbolsBase, *SymbolsCount, sizeof(ROSSYM_ENTRY), (int (*)(const void *, const void *)) CompareSymEntry);
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StringHashTableFree(&StringHash);
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return 0;
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}
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@ -281,6 +370,7 @@ ConvertCoffs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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char FuncName[256], FileName[1024];
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char *p;
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PROSSYM_ENTRY Current;
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struct StringHashTable StringHash;
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CoffEntry = (PCOFF_SYMENT) CoffSymbolsBase;
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Count = CoffSymbolsLength / sizeof(COFF_SYMENT);
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@ -294,6 +384,8 @@ ConvertCoffs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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*SymbolsCount = 0;
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Current = *SymbolsBase;
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StringHashTableInit(&StringHash, *StringsLength, (char*)StringsBase);
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for (i = 0; i < Count; i++)
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{
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if (ISFCN(CoffEntry[i].e_type) || C_EXT == CoffEntry[i].e_sclass)
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@ -319,6 +411,7 @@ ConvertCoffs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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{
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free(*SymbolsBase);
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fprintf(stderr, "Function name too long\n");
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StringHashTableFree(&StringHash);
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return 1;
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}
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strcpy(FuncName, (char *) CoffStringsBase + CoffEntry[i].e.e.e_offset);
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@ -336,7 +429,8 @@ ConvertCoffs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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*p = '\0';
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}
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p = ('_' == FuncName[0] || '@' == FuncName[0] ? FuncName + 1 : FuncName);
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Current->FunctionOffset = FindOrAddString(p,
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Current->FunctionOffset = FindOrAddString(&StringHash,
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p,
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StringsLength,
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StringsBase);
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Current->SourceLine = 0;
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@ -349,6 +443,8 @@ ConvertCoffs(ULONG *SymbolsCount, PROSSYM_ENTRY *SymbolsBase,
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*SymbolsCount = (Current - *SymbolsBase + 1);
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qsort(*SymbolsBase, *SymbolsCount, sizeof(ROSSYM_ENTRY), (int (*)(const void *, const void *)) CompareSymEntry);
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StringHashTableFree(&StringHash);
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return 0;
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}
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@ -371,21 +467,6 @@ struct DbgHelpStringTab {
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struct DbgHelpLineEntry *lastLineEntry;
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};
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/* This is the famous DJB hash */
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static unsigned int
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ComputeDJBHash(const char *name)
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{
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unsigned int val = 5381;
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int i = 0;
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for (i = 0; name[i]; i++)
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{
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val = (33 * val) + name[i];
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}
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return val;
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}
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static struct DbgHelpLineEntry*
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DbgHelpAddLineEntry(struct DbgHelpStringTab *tab)
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{
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