mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
551ccae044
Move include/Config and include/Support into include/llvm/Config, include/llvm/ADT and include/llvm/Support. From here on out, all LLVM public header files must be under include/llvm/. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
393 lines
12 KiB
C
393 lines
12 KiB
C
/*===-- tracelib.c - Runtime routines for tracing ---------------*- C++ -*-===*
|
|
*
|
|
* Runtime routines for supporting tracing of execution for code generated by
|
|
* LLVM.
|
|
*
|
|
*===----------------------------------------------------------------------===*/
|
|
|
|
#include "tracelib.h"
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "llvm/Support/DataTypes.h"
|
|
|
|
/*===---------------------------------------------------------------------=====
|
|
* HASH FUNCTIONS
|
|
*===---------------------------------------------------------------------===*/
|
|
|
|
/* use #defines until we have inlining */
|
|
typedef uintptr_t Index; /* type of keys, size for hash table */
|
|
typedef uint32_t Generic; /* type of values stored in table */
|
|
|
|
/* Index IntegerHashFunc(const Generic value, const Index size) */
|
|
#define IntegerHashFunc(value, size) \
|
|
( ((((Index) value) << 3) ^ (((Index) value) >> 3)) % size )
|
|
|
|
/* Index IntegerRehashFunc(const Generic oldHashValue, const Index size) */
|
|
#define IntegerRehashFunc(oldHashValue, size) \
|
|
((Index) ((oldHashValue+16) % size)) /* 16 is relatively prime to a Mersenne prime! */
|
|
|
|
/* Index PointerHashFunc(const void* value, const Index size) */
|
|
#define PointerHashFunc(value, size) \
|
|
IntegerHashFunc((Index) value, size)
|
|
|
|
/* Index PointerRehashFunc(const void* value, const Index size) */
|
|
#define PointerRehashFunc(value, size) \
|
|
IntegerRehashFunc((Index) value, size)
|
|
|
|
/*===---------------------------------------------------------------------=====
|
|
* POINTER-TO-GENERIC HASH TABLE.
|
|
* These should be moved to a separate location: HashTable.[ch]
|
|
*===---------------------------------------------------------------------===*/
|
|
|
|
typedef enum { FIND, ENTER } ACTION;
|
|
typedef char FULLEMPTY;
|
|
const FULLEMPTY EMPTY = '\0';
|
|
const FULLEMPTY FULL = '\1';
|
|
|
|
// List of primes closest to powers of 2 in [2^20 -- 2^30], obtained from
|
|
// http://www.utm.edu/research/primes/lists/2small/0bit.html.
|
|
// Use these as the successive sizes of the hash table.
|
|
#define NUMPRIMES 11
|
|
#define FIRSTENTRY 2
|
|
const uint PRIMES[NUMPRIMES] = { (1<<20)-3, (1<<21)-9, (1<<22)-3, (1<<23)-15,
|
|
(1<<24)-3, (1<<25)-39, (1<<26)-5, (1<<27)-39,
|
|
(1<<28)-57, (1<<29)-3, (1<<30)-35 };
|
|
uint CurrentSizeEntry = FIRSTENTRY;
|
|
|
|
const uint MAX_NUM_PROBES = 4;
|
|
|
|
typedef struct PtrValueHashEntry_struct {
|
|
void* key;
|
|
Generic value;
|
|
} PtrValueHashEntry;
|
|
|
|
typedef struct PtrValueHashTable_struct {
|
|
PtrValueHashEntry* table;
|
|
FULLEMPTY* fullEmptyFlags;
|
|
Index capacity;
|
|
Index size;
|
|
} PtrValueHashTable;
|
|
|
|
|
|
static Generic LookupOrInsertPtr(PtrValueHashTable* ptrTable, void* ptr,
|
|
ACTION action, Generic value);
|
|
|
|
static void Insert(PtrValueHashTable* ptrTable, void* ptr, Generic value);
|
|
|
|
static void Delete(PtrValueHashTable* ptrTable, void* ptr);
|
|
|
|
/* Returns 0 if the item is not found. */
|
|
/* void* LookupPtr(PtrValueHashTable* ptrTable, void* ptr) */
|
|
#define LookupPtr(ptrTable, ptr) \
|
|
LookupOrInsertPtr(ptrTable, ptr, FIND, (Generic) 0)
|
|
|
|
void
|
|
InitializeTable(PtrValueHashTable* ptrTable, Index newSize)
|
|
{
|
|
ptrTable->table = (PtrValueHashEntry*) calloc(newSize,
|
|
sizeof(PtrValueHashEntry));
|
|
ptrTable->fullEmptyFlags = (FULLEMPTY*) calloc(newSize, sizeof(FULLEMPTY));
|
|
ptrTable->capacity = newSize;
|
|
ptrTable->size = 0;
|
|
}
|
|
|
|
PtrValueHashTable*
|
|
CreateTable(Index initialSize)
|
|
{
|
|
PtrValueHashTable* ptrTable =
|
|
(PtrValueHashTable*) malloc(sizeof(PtrValueHashTable));
|
|
InitializeTable(ptrTable, initialSize);
|
|
return ptrTable;
|
|
}
|
|
|
|
void
|
|
ReallocTable(PtrValueHashTable* ptrTable, Index newSize)
|
|
{
|
|
if (newSize <= ptrTable->capacity)
|
|
return;
|
|
|
|
#ifndef NDEBUG
|
|
printf("\n***\n*** REALLOCATING SPACE FOR POINTER HASH TABLE.\n");
|
|
printf("*** oldSize = %ld, oldCapacity = %ld\n***\n\n",
|
|
(long) ptrTable->size, (long) ptrTable->capacity);
|
|
#endif
|
|
|
|
unsigned int i;
|
|
PtrValueHashEntry* oldTable = ptrTable->table;
|
|
FULLEMPTY* oldFlags = ptrTable->fullEmptyFlags;
|
|
Index oldSize = ptrTable->size;
|
|
Index oldCapacity = ptrTable->capacity;
|
|
|
|
/* allocate the new storage and flags and re-insert the old entries */
|
|
InitializeTable(ptrTable, newSize);
|
|
for (i=0; i < oldCapacity; ++i)
|
|
if (oldFlags[i] == FULL)
|
|
Insert(ptrTable, oldTable[i].key, oldTable[i].value);
|
|
|
|
assert(ptrTable->size == oldSize && "Incorrect number of entries copied?");
|
|
|
|
#ifndef NDEBUG
|
|
for (i=0; i < oldCapacity; ++i)
|
|
if (oldFlags[i] == FULL)
|
|
assert(LookupPtr(ptrTable, oldTable[i].key) == oldTable[i].value);
|
|
#endif
|
|
|
|
free(oldTable);
|
|
free(oldFlags);
|
|
}
|
|
|
|
void
|
|
DeleteTable(PtrValueHashTable* ptrTable)
|
|
{
|
|
free(ptrTable->table);
|
|
free(ptrTable->fullEmptyFlags);
|
|
memset(ptrTable, '\0', sizeof(PtrValueHashTable));
|
|
free(ptrTable);
|
|
}
|
|
|
|
void
|
|
InsertAtIndex(PtrValueHashTable* ptrTable, void* ptr, Generic value, Index index)
|
|
{
|
|
assert(ptrTable->fullEmptyFlags[index] == EMPTY && "Slot is in use!");
|
|
ptrTable->table[index].key = ptr;
|
|
ptrTable->table[index].value = value;
|
|
ptrTable->fullEmptyFlags[index] = FULL;
|
|
ptrTable->size++;
|
|
}
|
|
|
|
void
|
|
DeleteAtIndex(PtrValueHashTable* ptrTable, Index index)
|
|
{
|
|
assert(ptrTable->fullEmptyFlags[index] == FULL && "Deleting empty slot!");
|
|
ptrTable->table[index].key = 0;
|
|
ptrTable->table[index].value = (Generic) 0;
|
|
ptrTable->fullEmptyFlags[index] = EMPTY;
|
|
ptrTable->size--;
|
|
}
|
|
|
|
Index
|
|
FindIndex(PtrValueHashTable* ptrTable, void* ptr)
|
|
{
|
|
uint numProbes = 1;
|
|
Index index = PointerHashFunc(ptr, ptrTable->capacity);
|
|
if (ptrTable->fullEmptyFlags[index] == FULL)
|
|
{
|
|
if (ptrTable->table[index].key == ptr)
|
|
return index;
|
|
|
|
/* First lookup failed on non-empty slot: probe further */
|
|
while (numProbes < MAX_NUM_PROBES)
|
|
{
|
|
index = PointerRehashFunc(index, ptrTable->capacity);
|
|
if (ptrTable->fullEmptyFlags[index] == EMPTY)
|
|
break;
|
|
else if (ptrTable->table[index].key == ptr)
|
|
return index;
|
|
++numProbes;
|
|
}
|
|
}
|
|
|
|
/* Lookup failed: item is not in the table. */
|
|
/* If last slot is empty, use that slot. */
|
|
/* Otherwise, table must have been reallocated, so search again. */
|
|
|
|
if (numProbes == MAX_NUM_PROBES)
|
|
{ /* table is too full: reallocate and search again */
|
|
if (CurrentSizeEntry >= NUMPRIMES-1) {
|
|
fprintf(stderr, "Out of PRIME Numbers!!!");
|
|
abort();
|
|
}
|
|
ReallocTable(ptrTable, PRIMES[++CurrentSizeEntry]);
|
|
return FindIndex(ptrTable, ptr);
|
|
}
|
|
else
|
|
{
|
|
assert(ptrTable->fullEmptyFlags[index] == EMPTY &&
|
|
"Stopped before finding an empty slot and before MAX probes!");
|
|
return index;
|
|
}
|
|
}
|
|
|
|
/* Look up hash table using 'ptr' as the key. If an entry exists, return
|
|
* the value mapped to 'ptr'. If not, and if action==ENTER is specified,
|
|
* create a new entry with value 'value', but return 0 in any case.
|
|
*/
|
|
Generic
|
|
LookupOrInsertPtr(PtrValueHashTable* ptrTable, void* ptr, ACTION action,
|
|
Generic value)
|
|
{
|
|
Index index = FindIndex(ptrTable, ptr);
|
|
if (ptrTable->fullEmptyFlags[index] == FULL &&
|
|
ptrTable->table[index].key == ptr)
|
|
return ptrTable->table[index].value;
|
|
|
|
/* Lookup failed: item is not in the table */
|
|
/* If action is ENTER, insert item into the table. Return 0 in any case. */
|
|
if (action == ENTER)
|
|
InsertAtIndex(ptrTable, ptr, value, index);
|
|
|
|
return (Generic) 0;
|
|
}
|
|
|
|
void
|
|
Insert(PtrValueHashTable* ptrTable, void* ptr, Generic value)
|
|
{
|
|
Index index = FindIndex(ptrTable, ptr);
|
|
assert(ptrTable->fullEmptyFlags[index] == EMPTY &&
|
|
"ptr is already in the table: delete it first!");
|
|
InsertAtIndex(ptrTable, ptr, value, index);
|
|
}
|
|
|
|
void
|
|
Delete(PtrValueHashTable* ptrTable, void* ptr)
|
|
{
|
|
Index index = FindIndex(ptrTable, ptr);
|
|
if (ptrTable->fullEmptyFlags[index] == FULL &&
|
|
ptrTable->table[index].key == ptr)
|
|
{
|
|
DeleteAtIndex(ptrTable, index);
|
|
}
|
|
}
|
|
|
|
/*===---------------------------------------------------------------------=====
|
|
* RUNTIME ROUTINES TO MAP POINTERS TO SEQUENCE NUMBERS
|
|
*===---------------------------------------------------------------------===*/
|
|
|
|
PtrValueHashTable* SequenceNumberTable = NULL;
|
|
#define INITIAL_SIZE (PRIMES[FIRSTENTRY])
|
|
|
|
#define MAX_NUM_SAVED 1024
|
|
|
|
typedef struct PointerSet_struct {
|
|
char* savedPointers[MAX_NUM_SAVED]; /* 1024 alloca'd ptrs shd suffice */
|
|
unsigned int numSaved;
|
|
struct PointerSet_struct* nextOnStack; /* implement a cheap stack */
|
|
} PointerSet;
|
|
|
|
PointerSet* topOfStack = NULL;
|
|
|
|
SequenceNumber
|
|
HashPointerToSeqNum(char* ptr)
|
|
{
|
|
static SequenceNumber count = 0;
|
|
SequenceNumber seqnum;
|
|
if (SequenceNumberTable == NULL) {
|
|
assert(MAX_NUM_PROBES < INITIAL_SIZE+1 && "Initial size too small");
|
|
SequenceNumberTable = CreateTable(INITIAL_SIZE);
|
|
}
|
|
seqnum = (SequenceNumber)
|
|
LookupOrInsertPtr(SequenceNumberTable, ptr, ENTER, count+1);
|
|
|
|
if (seqnum == 0) /* new entry was created with value count+1 */
|
|
seqnum = ++count; /* so increment counter */
|
|
|
|
assert(seqnum <= count && "Invalid sequence number in table!");
|
|
return seqnum;
|
|
}
|
|
|
|
void
|
|
ReleasePointerSeqNum(char* ptr)
|
|
{ /* if a sequence number was assigned to this ptr, release it */
|
|
if (SequenceNumberTable != NULL)
|
|
Delete(SequenceNumberTable, ptr);
|
|
}
|
|
|
|
void
|
|
PushPointerSet()
|
|
{
|
|
PointerSet* newSet = (PointerSet*) malloc(sizeof(PointerSet));
|
|
newSet->numSaved = 0;
|
|
newSet->nextOnStack = topOfStack;
|
|
topOfStack = newSet;
|
|
}
|
|
|
|
void
|
|
PopPointerSet()
|
|
{
|
|
PointerSet* oldSet;
|
|
assert(topOfStack != NULL && "popping from empty stack!");
|
|
oldSet = topOfStack;
|
|
topOfStack = oldSet->nextOnStack;
|
|
assert(oldSet->numSaved == 0);
|
|
free(oldSet);
|
|
}
|
|
|
|
/* free the pointers! */
|
|
static void
|
|
ReleaseRecordedPointers(char* savedPointers[MAX_NUM_SAVED],
|
|
unsigned int numSaved)
|
|
{
|
|
unsigned int i;
|
|
for (i=0; i < topOfStack->numSaved; ++i)
|
|
ReleasePointerSeqNum(topOfStack->savedPointers[i]);
|
|
}
|
|
|
|
void
|
|
ReleasePointersPopSet()
|
|
{
|
|
ReleaseRecordedPointers(topOfStack->savedPointers, topOfStack->numSaved);
|
|
topOfStack->numSaved = 0;
|
|
PopPointerSet();
|
|
}
|
|
|
|
void
|
|
RecordPointer(char* ptr)
|
|
{ /* record pointers for release later */
|
|
if (topOfStack->numSaved == MAX_NUM_SAVED) {
|
|
printf("***\n*** WARNING: OUT OF ROOM FOR SAVED POINTERS."
|
|
" ALL POINTERS ARE BEING FREED.\n"
|
|
"*** THE SEQUENCE NUMBERS OF SAVED POINTERS WILL CHANGE!\n*** \n");
|
|
ReleaseRecordedPointers(topOfStack->savedPointers, topOfStack->numSaved);
|
|
topOfStack->numSaved = 0;
|
|
}
|
|
topOfStack->savedPointers[topOfStack->numSaved++] = ptr;
|
|
}
|
|
|
|
/*===---------------------------------------------------------------------=====
|
|
* TEST DRIVER FOR INSTRUMENTATION LIBRARY
|
|
*===---------------------------------------------------------------------===*/
|
|
|
|
#ifndef TEST_INSTRLIB
|
|
#undef TEST_INSTRLIB /* #define this to turn on by default */
|
|
#endif
|
|
|
|
#ifdef TEST_INSTRLIB
|
|
int
|
|
main(int argc, char** argv)
|
|
{
|
|
int i, j;
|
|
int doRelease = 0;
|
|
|
|
INITIAL_SIZE = 5; /* start with small table to test realloc's*/
|
|
|
|
if (argc > 1 && ! strcmp(argv[1], "-r"))
|
|
{
|
|
PushPointerSet();
|
|
doRelease = 1;
|
|
}
|
|
|
|
for (i=0; i < argc; ++i)
|
|
for (j=0; argv[i][j]; ++j)
|
|
{
|
|
printf("Sequence number for argc[%d][%d] (%c) = Hash(%p) = %d\n",
|
|
i, j, argv[i][j], argv[i]+j, HashPointerToSeqNum(argv[i]+j));
|
|
|
|
if (doRelease)
|
|
RecordPointer(argv[i]+j);
|
|
}
|
|
|
|
if (doRelease)
|
|
ReleasePointersPopSet();
|
|
|
|
/* print sequence numbers out again to compare with (-r) and w/o release */
|
|
for (i=argc-1; i >= 0; --i)
|
|
for (j=0; argv[i][j]; ++j)
|
|
printf("Sequence number for argc[%d][%d] (%c) = %d\n",
|
|
i, j, argv[i][j], argv[i]+j, HashPointerToSeqNum(argv[i]+j));
|
|
|
|
return 0;
|
|
}
|
|
#endif
|