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3d5e2ca85f
This was achieved by partially undoing changelist 24817, including an accidental corruption of eventgen.pl. Copied from Perforce Change: 24877 ServerID: perforce.ravenbrook.com
437 lines
9.9 KiB
C
437 lines
9.9 KiB
C
/* impl.c.eventpro: Event processing routines
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* Copyright (c) 2001 Ravenbrook Limited.
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*
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* $Id$
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* $HopeName: MMsrc!eventpro.c(trunk.4) $
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*/
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#include "config.h"
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/* override variety setting for EVENT */
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#define EVENT
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#include "table.h"
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#include "eventcom.h"
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#include "eventpro.h"
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#include "misc.h"
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#include "mpmtypes.h"
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#include <assert.h> /* assert */
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#include <stdlib.h> /* size_t */
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#include <string.h> /* strcmp */
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struct EventProcStruct {
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Bool partialLog; /* Is this a partial log? */
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EventProcReader reader; /* reader fn */
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void *readerP; /* closure pointer for reader fn */
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Table internTable; /* dictionary of intern ids to symbols */
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Table labelTable; /* dictionary of addrs to intern ids */
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void *cachedEvent;
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};
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/* error -- error signalling
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*
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* Should integrate with client exceptions, but that'll do for now.
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*/
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#define error(fmt, arg) assert(((void)fmt, FALSE));
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/* PointerAdd -- add offset to pointer
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*
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* Copy of the def in mpm.h which we can't include
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*/
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#define PointerAdd(p, s) ((void *)((char *)(p) + (s)))
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/* sizeAlignUp -- align size_t values up */
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#define sizeAlignUp(w, a) (((w) + (a) - 1) & ~((size_t)(a) - 1))
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/* EventSizeAlign -- Calculate actual size of event in the output
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*
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* Calculates the actual size of an event in the output, given the size
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* of the structure. This has to agree with the writing (EVENT_END).
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*/
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#define EventSizeAlign(size) sizeAlignUp(size, sizeof(Word))
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/* Event types */
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/* eventTypes -- an array containing info about the event types */
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typedef struct {
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EventType type;
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char *name;
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size_t code;
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size_t length;
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char *format;
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} eventRecord;
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static eventRecord eventTypes[] = {
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{0, "(unused)", 0, 0, "0"},
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#define RELATION(name, code, always, kind, format) \
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{Event##name, #name, code, \
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EventSizeAlign(sizeof(Event##format##Struct)), #format},
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#include "eventdef.h"
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#undef RELATION
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};
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#define eventTypeCount (sizeof(eventTypes) / sizeof(eventRecord))
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/* eventType2Index -- find index in eventTypes for the given type */
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static size_t eventType2Index(EventType type)
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{
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size_t i;
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for(i = 0; i < eventTypeCount; ++i)
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if (eventTypes[i].type == type)
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return i;
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error("Unknown event type %08lX", type);
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return 0;
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}
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/* eventcode2Index -- find index in eventTypes for the given code */
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static size_t eventCode2Index(EventCode code, Bool errorp)
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{
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size_t i;
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for(i = 0; i < eventTypeCount; ++i)
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if (eventTypes[i].code == code)
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return i;
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if (errorp)
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error("Unknown event code %08lX", code);
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return 0;
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}
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/* EventName2Code -- find event code for the given event name */
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EventCode EventName2Code(char *name)
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{
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size_t i;
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for(i = 0; i < eventTypeCount; ++i)
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if (strcmp(eventTypes[i].name, name) == 0) {
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assert(eventTypes[i].code <= EventCodeMAX);
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return eventTypes[i].code;
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}
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error("Unknown event name %s", name);
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return 0;
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}
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/* EventCode2Name -- find event name for the given event code */
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char *EventCode2Name(EventCode code)
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{
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return eventTypes[eventCode2Index(code, TRUE)].name;
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}
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/* EventCode2Format -- find format for the given event code */
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char *EventCode2Format(EventCode code)
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{
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return eventTypes[eventCode2Index(code, TRUE)].format;
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}
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/* EventGetCode -- get event code of the given event */
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EventCode EventGetCode(Event event)
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{
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size_t i = eventType2Index(event->any.code);
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assert(eventTypes[i].code <= EventCodeMAX);
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return eventTypes[i].code;
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}
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Bool EventCodeIsValid(EventCode code)
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{
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return (eventCode2Index(code, FALSE) != 0);
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}
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/* EventStrings */
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/* EventStringEmpty -- an empty event string */
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EventStringStruct EventStringEmpty = {0, ""};
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/* eventStringCopy -- copy an event string */
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static Res eventStringCopy(EventString *str_o, EventString str)
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{
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EventString newStr;
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newStr = (EventString)malloc(offsetof(EventStringStruct, str)
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+ str->len);
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if (newStr == NULL) return ResMEMORY;
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newStr->len = str->len;
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memcpy(&(newStr->str), &(str->str), str->len);
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*str_o = newStr;
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return ResOK;
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}
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static void eventStringDestroy(EventString str)
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{
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free(str);
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}
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/* Labels */
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/* Symbol -- representation of an interned string */
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typedef struct symbolStruct {
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Word id;
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EventString name;
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} symbolStruct;
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typedef struct symbolStruct *Symbol;
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/* Label -- representation of a labelled address */
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typedef struct labelStruct {
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Word id;
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Word time;
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Addr addr;
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} labelStruct;
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typedef struct labelStruct *Label;
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/* AddrLabel -- return intern id for given addr (or 0 if none) */
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Word AddrLabel(EventProc proc, Addr addr)
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{
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void *entry;
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if (TableLookup(&entry, proc->labelTable, (Word)addr))
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return ((Label)entry)->id;
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else
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return (Word)0;
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}
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/* LabelText -- return text for given intern id (or NULL if none) */
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EventString LabelText(EventProc proc, Word id)
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{
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void *entry;
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if (TableLookup(&entry, proc->internTable, id))
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return ((Symbol)entry)->name;
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else
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return NULL;
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}
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/* Processing */
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/* EventRead -- read one event from the file and allocate descriptor */
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#define internStrOffset (offsetof(EventWSStruct, s1.str))
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Res EventRead(Event *eventReturn, EventProc proc)
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{
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size_t eventIndex, length;
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Res res;
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EventType type;
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Event event;
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void *restOfEvent;
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res = proc->reader(proc->readerP, &type, sizeof(EventType));
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if (res != ResOK) return res;
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eventIndex = eventType2Index(type);
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length = eventTypes[eventIndex].length;
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if (proc->cachedEvent != NULL) {
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event = proc->cachedEvent;
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proc->cachedEvent = NULL;
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} else {
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/* This is too long for most events, but never mind. */
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event = (Event)malloc(sizeof(EventUnion));
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if (event == NULL) return ResMEMORY;
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}
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event->any.code = type;
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restOfEvent = PointerAdd(event, sizeof(EventType));
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if (type == EventIntern) { /* the only string event */
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/* read enough to get the length */
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res = proc->reader(proc->readerP, restOfEvent,
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internStrOffset - sizeof(EventType));
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if (res != ResOK) return res;
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/* read the rest */
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res = proc->reader(proc->readerP, &(event->ws.s1.str),
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/* Length must agree with EVENT_WS. */
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EventSizeAlign(internStrOffset + event->ws.s1.len)
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- internStrOffset);
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if (res != ResOK) return res;
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} else {
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res = proc->reader(proc->readerP, restOfEvent,
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length - sizeof(EventType));
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if (res != ResOK) return res;
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}
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*eventReturn = event;
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return ResOK;
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}
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/* EventRecord -- record event in databases
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*
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* Currently only labels are tracked, but perhaps there will be other
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* stuff in the future.
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*/
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Res EventRecord(EventProc proc, Event event, Word etime)
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{
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Res res;
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switch(event->any.code) {
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case EventIntern: { /* id, label */
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Symbol sym = malloc(sizeof(symbolStruct));
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if (sym == NULL) return ResMEMORY;
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sym->id = event->ws.w0;
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res = eventStringCopy(&(sym->name), &(event->ws.s1));
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if (res != ResOK) {
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free(sym);
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return res;
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}
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res = TableDefine(proc->internTable, sym->id, sym);
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} break;
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case EventLabel: { /* addr, id */
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Label label = malloc(sizeof(labelStruct));
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void *entry;
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if (label == NULL) return ResMEMORY;
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label->id = event->aw.w1;
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if (!proc->partialLog) {
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assert(TableLookup(&entry, proc->internTable, label->id));
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}
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label->time = etime;
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label->addr = event->aw.a0;
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if (TableLookup(&entry, proc->labelTable, (Word)label->addr))
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res = TableRedefine(proc->labelTable, (Word)label->addr, label);
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else
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res = TableDefine(proc->labelTable, (Word)label->addr, label);
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} break;
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default:
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res = ResOK;
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break;
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}
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return res;
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}
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/* EventDestroy -- destroy an event */
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void EventDestroy(EventProc proc, Event event)
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{
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if (proc->cachedEvent == NULL)
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proc->cachedEvent = event;
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else
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free(event);
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}
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/* initialization and finishing */
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/* Checking macros, copied from check.h */
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#define CHECKLVALUE(lv1, lv2) \
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((void)sizeof((lv1) = (lv2)), (void)sizeof((lv2) = (lv1)), TRUE)
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#define CHECKTYPE(t1, t2) \
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(sizeof(t1) == sizeof(t2) && \
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CHECKLVALUE(*((t1 *)0), *((t2 *)0)))
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#define CHECKFIELDAPPROX(s1, f1, s2, f2) \
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(sizeof(((s1 *)0)->f1) == sizeof(((s2 *)0)->f2) && \
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offsetof(s1, f1) == offsetof(s2, f2))
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#define CHECKFIELD(s1, f1, s2, f2) \
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(CHECKFIELDAPPROX(s1, f1, s2, f2) && \
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CHECKLVALUE(((s1 *)0)->f1, ((s2 *)0)->f2))
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/* EventProcCreate -- initialize the module */
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Res EventProcCreate(EventProc *procReturn, Bool partial,
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EventProcReader reader, void *readerP)
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{
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Res res;
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EventProc proc = malloc(sizeof(struct EventProcStruct));
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if (proc == NULL) return ResMEMORY;
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/* check event struct access */
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assert(CHECKFIELD(EventUnion, any.code, EventWSStruct, code));
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assert(CHECKFIELD(EventUnion, any.clock, EventWSStruct, clock));
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/* check use of labelTable */
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#if !defined(MPS_OS_FR)
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/* GCC -ansi -pedantic -Werror on FreeBSD will fail here
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* with the warning "statement with no effect". */
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assert(sizeof(Word) >= sizeof(Addr));
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#endif
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proc->partialLog = partial;
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proc->reader = reader; proc->readerP = readerP;
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res = TableCreate(&proc->internTable, (size_t)1<<4);
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if (res != ResOK) goto failIntern;
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res = TableCreate(&proc->labelTable, (size_t)1<<7);
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if (res != ResOK) goto failLabel;
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proc->cachedEvent = NULL;
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*procReturn = proc;
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return ResOK;
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failLabel:
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TableDestroy(proc->internTable);
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failIntern:
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free(proc);
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return res;
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}
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/* EventProcDestroy -- finish the module */
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static void deallocItem(Word key, void *value)
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{
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UNUSED(key);
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free(value);
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}
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static void deallocSym(Word key, void *value)
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{
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UNUSED(key);
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eventStringDestroy(((Symbol)value)->name);
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free(value);
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}
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void EventProcDestroy(EventProc proc)
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{
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TableMap(proc->labelTable, deallocItem);
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TableMap(proc->internTable, deallocSym);
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TableDestroy(proc->labelTable);
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TableDestroy(proc->internTable);
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if (proc->cachedEvent != NULL)
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free(proc->cachedEvent);
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free(proc);
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}
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