#include "CS.h"

char *prg_name;
struct timeval t0;

void debug_init(char *prgname) {
	prg_name = prgname;
	gettimeofday(&t0, NULL);
}
void pre(char *o) {
	fprintf(stderr, "%s\n", o);
	fflush(stderr);
}
void deb(int level, DebugP deP) {
	if ((csP->debMaxLev >= level && csP->debMaxLev != 7) || (csP->debMaxLev == 7 && level == 7)) {
		if(sem_wait(&(csP->shP->debugSem))< 0) ERR("LOG sem_wait");
		struct timeval t;
		gettimeofday(&t, NULL);
		fprintf(stderr, "%03ld%06d %s: %s\n", (long)t.tv_sec-t0.tv_sec, (int)t.tv_usec, deP->id, deP->msg);
		fflush(stderr);
		if(sem_post(&(csP->shP->debugSem)) < 0) ERR("LOG sem_post");
	}
}
void err(int level, char *o, DebugP deP) {
	fprintf(stderr, "%s: %s\n", deP->id, o);
	fflush(stderr);
}
void back_trace() {
	if(sem_wait(&(csP->shP->debugSem))< 0) ERR("LOG sem_wait");

   int j, nptrs;
   void *buffer[24];
   char **strings;

   nptrs = backtrace(buffer, 24);

   strings = backtrace_symbols(buffer, nptrs);
   if (strings == NULL) {
       ERR("ABORT backtrace_symbols");
       exit(EXIT_FAILURE);
   }

   char shcmd[] = "sed -e 's/.*\\[\\(.*\\)\\]$/\\1/' | addr2line -fspe ";
   char *cmdbuf = malloc(sizeof(shcmd) + 64);
   strcpy(cmdbuf, shcmd);
   strcat(cmdbuf, prg_name);
	#define SIZE 640
   char *resbuf = malloc(SIZE);;
   for(j = 0; j < nptrs; j++) {
   	int pc[2], po[2];
   	if(pipe(pc) < 0) ERR("ABORT pipe");
   	if(pipe(po) < 0) ERR("ABORT pipe");
   	if(!fork()) {
   		close(po[0]); dup2(po[1],1);
   		close(pc[1]); dup2(pc[0],0);
   		execl("/bin/bash", "/bin/bash", "-c", cmdbuf, (char *) NULL);
   	}
		if(write(pc[1], strings[j], strlen(strings[j])) < 0) ERR("ABORT write pipe");
		if(write(pc[1], "\n", 1) < 0) ERR("ABORT write pipe");
		close(pc[1]);
		memset(resbuf, 0, SIZE);
		if(read(po[0], resbuf, SIZE)) fprintf(stderr, "%s", resbuf);
		for(int i = 0; i < 2; i++) close(po[i]), close(pc[i]);
   }
	if(sem_post(&(csP->shP->debugSem))< 0) ERR("LOG sem_post");
   free(strings); free(cmdbuf); free(resbuf);

}