#include <stdlib.h>
#include <string.h>
#include <assert.h>
-#include "HsFFI.h"
#include "Rts.h"
#include "Hpc.h"
+#include "Trace.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
/* This is the runtime support for the Haskell Program Coverage (hpc) toolkit,
* inside GHC.
*
*/
-#define DEBUG_HPC 0
+#define WOP_SIZE 1024
static int hpc_inited = 0; // Have you started this component?
+static int totalTickCount = 0; // How many ticks have we got to work with
static FILE *tixFile; // file being read/written
static int tix_ch; // current char
static StgWord64 magicTixNumber; // Magic/Hash number to mark .tix files
-static FILE *rixFile = NULL; // The tracer file/pipe
+static FILE *rixFile = NULL; // The tracer file/pipe (to debugger)
+static FILE *rixCmdFile = NULL; // The tracer file/pipe (from debugger)
+static StgWord64 rixCounter = 0; // The global event counter
+static int debuggee_pid;
+
+typedef enum {
+ RixThreadFinishedOp = -1,
+ RixRaiseOp = -2,
+ RixFinishedOp = -3
+} HpcRixOp;
+
typedef struct _Info {
char *modName; // name of module
StgWord64 *tixBoxes = 0; // local copy of tixBoxes array, from file.
int totalTixes = 0; // total number of tix boxes.
-
-
static char *tixFilename;
static void failure(char *msg) {
- printf("Hpc failure: %s\n",msg);
- printf("(perhaps remove .tix file?)\n");
+ debugTrace(DEBUG_hpc,"hpc failure: %s\n",msg);
+ fprintf(stderr,"Hpc failure: %s\n",msg);
+ fprintf(stderr,"(perhaps remove .tix file?)\n");
exit(-1);
}
-
static int init_open(char *filename)
{
tixFile = fopen(filename,"r");
static void expect(char c) {
if (tix_ch != c) {
- printf("Hpc: parse failed (%c,%c)\n",tix_ch,c);
- exit(-1);
+ failure("parse error when reading .tix file");
}
tix_ch = getc(tixFile);
}
int i;
int offset = 0;
-#if DEBUG_HPC
- printf("hs_hpc_module(%s,%d)\n",modName,modCount);
-#endif
+ debugTrace(DEBUG_hpc,"hs_hpc_module(%s,%d)",modName,modCount);
hpc_init();
lastModule->next=tmpModule;
}
-#if DEBUG_HPC
- printf("end: hs_hpc_module\n");
-#endif
+ debugTrace(DEBUG_hpc,"end: hs_hpc_module");
+
return offset;
}
-static StgThreadID previous_tid = 0;
+static void breakPointCommand(HpcRixOp rixOp, StgThreadID rixTid);
-static void
-send_ThreadId(StgTSO *current_tso) {
- // This assumes that there is no real thread 0.
- StgThreadID tid = (current_tso == 0) ? 0 : current_tso->id;
- if (tid != previous_tid) {
- previous_tid = tid;
- // How do we print StgWord32's without a cast?
- fprintf(rixFile,"Thread Switch %d\n",(unsigned int)tid);
- }
+// Breakpointing
+static StgThreadID previousTid = 0;
+static StgWord64 rixBPCounter = 0; // The global event breakpoint counter
+static int *tixBoxBP;
+static HpcRixOp rixOpBack[WOP_SIZE]; // The actual op
+static HpcRixOp rixTidBack[WOP_SIZE]; // Tid's before the op
+
+void
+hs_hpc_raise_event(StgTSO *current_tso) {
+ hs_hpc_tick(RixRaiseOp,current_tso);
}
-/*
- * Called on *every* exception thrown
+void
+hs_hpc_thread_finished_event(StgTSO *current_tso) {
+ hs_hpc_tick(RixThreadFinishedOp,current_tso);
+}
+
+/* Called on every tick, dynamically, sending to our
+ * external record of program execution.
*/
+
void
-hs_hpc_event(char *msg,StgTSO *current_tso) {
- // Assumes that we have had at least *one* tick first.
- // All exceptions before the first tick are not reported.
- // The only time this might be an issue is in bootstrapping code,
- // so this is a feature.
+hs_hpc_tick(int rixOp, StgTSO *current_tso) {
- // This is called on *every* exception, even when Hpc is not enabled.
+ debugTrace(DEBUG_hpc,"hs_hpc_tick(%x)",rixOp);
- if (rixFile != NULL) {
- assert(hpc_inited != 0);
- send_ThreadId(current_tso);
- fprintf(rixFile,"%s\n",msg);
+ if (rixFile == NULL) {
+ return;
+ }
+ assert(rixCmdFile != NULL);
+ StgThreadID tid = (current_tso == 0) ? 0 : current_tso->id;
+
+ // now check to see if we have met a breakpoint condition
+ if (rixCounter == rixBPCounter
+ || tid != previousTid) {
+ breakPointCommand(rixOp,tid);
+ } else {
+ if (rixOp >= 0) {
+ // Tix op
+ if (tixBoxBP[rixOp] == 1) { // reached a bp tixbox
+ breakPointCommand(rixOp,tid);
+ }
+ } else {
+ // record the special operation
+ breakPointCommand(rixOp,tid);
+ }
}
+ // update the history information.
+ previousTid = tid;
+ rixOpBack[rixCounter % WOP_SIZE] = rixOp;
+ rixTidBack[rixCounter % WOP_SIZE] = tid;
+ rixCounter++;
+
+ debugTrace(DEBUG_hpc, "end: hs_hpc_tick");
}
-/* Called on every tick, dynamically to our file record of program execution
- */
+static void
+printEvent(FILE *out,StgWord64 rixCounter,StgThreadID rixTid,HpcRixOp rixOp) {
+ char prefixMsg[128];
+ char suffixMsg[128];
+
+ sprintf(prefixMsg,
+ "Event %" PRIuWORD64 " %u ",
+ rixCounter,
+ (unsigned int)rixTid);
+
+ switch(rixOp) {
+ case RixThreadFinishedOp:
+ sprintf(suffixMsg,"ThreadFinished");
+ break;
+ case RixRaiseOp:
+ sprintf(suffixMsg,"Raise");
+ break;
+ case RixFinishedOp:
+ sprintf(suffixMsg,"Finished");
+ break;
+ default:
+ sprintf(suffixMsg,"%u",rixOp);
+ }
-void
-hs_hpc_tick(int globIx, StgTSO *current_tso) {
-#if DEBUG_HPC && DEBUG
- printf("hs_hpc_tick(%d)\n",globIx);
-#endif
- assert(hpc_inited != 0);
- if (rixFile != NULL) {
- send_ThreadId(current_tso);
- fprintf(rixFile,"%d\n",globIx);
+ fprintf(out,"%s%s\n",prefixMsg,suffixMsg);
+ debugTrace(DEBUG_hpc,"sending %s%s",prefixMsg,suffixMsg);
+}
+
+static void
+breakPointCommand(HpcRixOp rixOp, StgThreadID rixTid) {
+ StgWord64 tmp64 = 0;
+ unsigned int tmp = 0;
+
+ if (getpid() != debuggee_pid) {
+ // We are not the original process, to do not issue
+ // any events, and do not try to talk to the debugger.
+ return;
}
-#if DEBUG_HPC
- printf("end: hs_hpc_tick\n");
-#endif
-
+ debugTrace(DEBUG_hpc,"breakPointCommand %d %x",rixOp,(unsigned int)rixTid);
+
+ printEvent(rixFile,rixCounter,rixTid,rixOp);
+ fflush(rixFile);
+
+ /* From here, you can ask some basic questions.
+ *
+ * c<nat> set the (one) counter breakpoint
+ * s<nat> set the (many) tickbox breakpoint
+ * u<nat> unset the (many) tickbox breakpoint
+ * h history
+
+ * Note that you aways end up here on the first tick
+ * because the rixBPCounter starts equal to 0.
+ */
+ int c = getc(rixCmdFile);
+ while(c != 10 && c != -1) {
+ switch(c) {
+ case 'c': // c1234 -- set counter breakpoint at 1234
+ c = getc(rixCmdFile);
+ tmp64 = 0;
+ while(isdigit(c)) {
+ tmp64 = tmp64 * 10 + (c - '0');
+ c = getc(rixCmdFile);
+ }
+ debugTrace(DEBUG_hpc,"setting countBP = %" PRIuWORD64,tmp64);
+
+ rixBPCounter = tmp64;
+ break;
+ case 's': // s2323 -- set tick box breakpoint at 2323
+ c = getc(rixCmdFile);
+ tmp = 0;
+ while(isdigit(c)) {
+ tmp = tmp * 10 + (c - '0');
+ c = getc(rixCmdFile);
+ }
+
+ debugTrace(DEBUG_hpc,"seting bp for tix %d",tmp);
+
+ tixBoxBP[tmp] = 1;
+ break;
+ case 'u': // u2323 -- unset tick box breakpoint at 2323
+ c = getc(rixCmdFile);
+ tmp = 0;
+ while(isdigit(c)) {
+ tmp = tmp * 10 + (c - '0');
+ c = getc(rixCmdFile);
+ }
+
+ debugTrace(DEBUG_hpc,"unseting bp for tix %d",tmp);
+
+ tixBoxBP[tmp] = 0;
+ break;
+ case 'h': // h -- history of the last few (WOP_SIZE) steps
+ if (rixCounter > WOP_SIZE) {
+ tmp64 = rixCounter - WOP_SIZE;
+ } else {
+ tmp64 = 0;
+ }
+ for(;tmp64 < rixCounter;tmp64++) {
+ printEvent(rixFile,
+ tmp64,
+ rixTidBack[tmp64 % WOP_SIZE],
+ rixOpBack[tmp64 % WOP_SIZE]);
+ }
+ fflush(rixFile);
+ c = getc(rixCmdFile);
+ break;
+ default:
+
+ debugTrace(DEBUG_hpc,"strange command from HPCRIX (%d)",c);
+
+ c = getc(rixCmdFile);
+ }
+ while (c != 10) { // the end of the line
+ c = getc(rixCmdFile); // to the end of the line
+ }
+ c = getc(rixCmdFile); // the first char on the next command
+ }
+
+ debugTrace(DEBUG_hpc,"leaving breakPointCommand");
+
}
/* This is called after all the modules have registered their local tixboxes,
startupHpc(void) {
Info *tmpModule;
char *hpcRix;
-#if DEBUG_HPC
- printf("startupHpc\n");
-#endif
+
+ debugTrace(DEBUG_hpc,"startupHpc");
if (hpc_inited == 0) {
return;
if (tixBoxes) {
for(;tmpModule != 0;tmpModule = tmpModule->next) {
+ totalTickCount += tmpModule->tickCount;
if (!tmpModule->tixArr) {
fprintf(stderr,"error: module %s did not register any hpc tick data\n",
tmpModule->modName);
}
}
- // HPCRIX contains the name of the file to send our dynamic runtime output to.
- // This might be a real file, or perhaps a named pipe.
+ // HPCRIX contains the name of the file to send our dynamic runtime output to (a named pipe).
+
hpcRix = getenv("HPCRIX");
if (hpcRix) {
int comma;
Info *tmpModule;
+ int rixFD, rixCmdFD;
+ int tixCount = 0;
assert(hpc_inited);
- rixFile = fopen(hpcRix,"w");
+ if (sscanf(hpcRix,"%d:%d",&rixFD,&rixCmdFD) != 2) {
+ /* Bad format for HPCRIX.
+ */
+ debugTrace(DEBUG_hpc,"Bad HPCRIX (%s)",hpcRix);
+ exit(0);
+ }
+
+ debugTrace(DEBUG_hpc,"found HPCRIX pipes: %d:%d",rixFD,rixCmdFD);
+
+ rixFile = fdopen(rixFD,"w");
+ assert(rixFile != NULL);
+
+ rixCmdFile = fdopen(rixCmdFD,"r");
+ assert(rixCmdFile != NULL);
+
+ // If we fork a process, then we do not want ticks inside
+ // the sub-process to talk to the debugger. So we remember
+ // our pid at startup time, so we can check if we are still
+ // the original process.
+
+ debuggee_pid = getpid();
comma = 0;
fprintf(rixFile,"(\"%s\",%u)",
tmpModule->modName,
tmpModule->tickCount);
-#if DEBUG_HPC
- fprintf(stderr,"(tracer)%s: %u (offset=%u)\n",
+
+ tixCount += tmpModule->tickCount;
+
+ debugTrace(DEBUG_hpc,"(tracer)%s: %u (offset=%u)\n",
tmpModule->modName,
tmpModule->tickCount,
tmpModule->tickOffset);
-#endif
+
}
fprintf(rixFile,"]\n");
fflush(rixFile);
+
+ // Allocate the tixBox breakpoint array
+ // These are set to 1 if you want to
+ // stop at a specific breakpoint
+ tixBoxBP = (int *)calloc(tixCount,sizeof(int));
}
}
Info *tmpModule;
int i, comma;
-#if DEBUG_HPC
- printf("exitHpc\n");
-#endif
+ debugTrace(DEBUG_hpc,"exitHpc");
if (hpc_inited == 0) {
return;
fprintf(f,"(\"%s\",%u)",
tmpModule->modName,
tmpModule->tickCount);
-#if DEBUG_HPC
- fprintf(stderr,"%s: %u (offset=%u)\n",
+ debugTrace(DEBUG_hpc,"%s: %u (offset=%u)\n",
tmpModule->modName,
tmpModule->tickCount,
tmpModule->tickOffset);
-#endif
}
fprintf(f,"] [");
tmpModule = modules;
for(;tmpModule != 0;tmpModule = tmpModule->next) {
if (!tmpModule->tixArr) {
- fprintf(stderr,"warning: module %s did not register any hpc tick data\n",
- tmpModule->modName);
+ debugTrace(DEBUG_hpc,
+ "warning: module %s did not register any hpc tick data\n",
+ tmpModule->modName);
}
for(i = 0;i < tmpModule->tickCount;i++) {
fclose(f);
if (rixFile != NULL) {
- fprintf(rixFile,"Finished\n");
+ hs_hpc_tick(RixFinishedOp,(StgThreadID)0);
fclose(rixFile);
}
+ if (rixCmdFile != NULL) {
+ fclose(rixCmdFile);
+ }
}
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