X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=regress%2Fhfuzzraw.c.m4;h=0ed71a2c326232cba12bb4e72fdac6b58ea575ec;hb=a469269abe5aefc86ca0ef6344eb1359985759f5;hp=15980450092e7043833c0126847e206f9e8ee2ae;hpb=963a228f0871ab49338cdc12583c7ac83b01de44;p=adns.git

diff --git a/regress/hfuzzraw.c.m4 b/regress/hfuzzraw.c.m4
index 1598045..0ed71a2 100644
--- a/regress/hfuzzraw.c.m4
+++ b/regress/hfuzzraw.c.m4
@@ -46,24 +46,19 @@ static vbuf fdtab;
 #define FDF_OPEN     001u
 #define FDF_NONBLOCK 002u
 
-static FILE *Tinputfile;
+static FILE *Tinputfile, *traceout;
+static int traceprint;
 
-void Q_vb(void) { abort(); /* we neve called Q_anythig */ }
-
-static void Pformat(const char *what) {
-  fprintf(stderr,"adns test harness: format error in raw log input file: %s\n",what);
-  exit(-1);
+static void Tflushtrace( void) {
+  if (fflush(traceout)) Toutputerr();
 }
 
-extern void Tshutdown(void) {
-}
+void Tensuresetup(void) {
+  static int done;
 
-static void Pcheckinput(void) {
-  if (ferror(Tinputfile)) Tfailed("read test log input file");
-  if (feof(Tinputfile)) Pformat("eof at syscall reply");
-}
+  if (done) return;
+  done++;
 
-void Tensurerecordfile(void) {
   int fd;
 
   fd = Ttestinputfd();
@@ -75,15 +70,63 @@ void Tensurerecordfile(void) {
     const char fdfstd = FDF_OPEN;
     if (!adns__vbuf_append(&fdtab,&fdfstd,1)) Tnomem();
   }
+
+  const char *traceprintstr= getenv("ADNS_TEST_FUZZRAW_TRACEPRINT");
+  if (traceprintstr) {
+    traceprint= atoi(traceprintstr);
+    traceout= fdopen(2,"w");  if (!traceout) Tfailed("fdopen for traceout");
+  }
+}
+
+void Q_vb(void) {
+  if (!traceprint) return; /* hcommon.c.m4 can call Q_vb directly */
+  if (!adns__vbuf_append(&vb,"",1)) Tnomem();
+  if (fprintf(traceout," %s\n",vb.buf) == EOF) Toutputerr();
+  Tflushtrace();
+}
+
+static void Pformat(const char *what) {
+  fprintf(stderr,"adns test harness: format error in raw log input file: %s\n",what);
+  exit(-1);
+}
+
+extern void Tshutdown(void) {
+  int c= fgetc(Tinputfile);
+  if (c!=EOF) Pformat("unwanted additional syscall reply data");
+  if (ferror(Tinputfile)) Tfailed("read test log input (at end)");
+}
+
+static void Pcheckinput(void) {
+  if (ferror(Tinputfile)) Tfailed("read test log input file");
+  if (feof(Tinputfile)) Pformat("eof at syscall reply");
 }
 
-static void P_read(void *p, size_t sz) {
-  ssize_t got = fread(&p,1,sz,Tinputfile);
+static void P_read_dump(const unsigned char *p0, size_t count, ssize_t d) {
+  fputs(" | ",traceout);
+  while (count) {
+    fprintf(traceout,"%02x", *p0);
+    p0 += d;
+    count--;
+  }
+}
+    
+static void P_read(void *p, size_t sz, const char *what) {
+  long pos = ftell(Tinputfile);
+  ssize_t got = fread(p,1,sz,Tinputfile);
   Pcheckinput();
   assert(got==sz);
+  if (traceprint>1 && sz) {
+    fprintf(traceout,"%8lx %8s:",pos,what);
+    P_read_dump(p, sz, +1);
+    if (sz<=16) {
+      P_read_dump((const unsigned char *)p+sz-1, sz, -1);
+    }
+    fputs(" |\n",traceout);
+    Tflushtrace();
+  }
 }
 
-#define P_READ(x) (P_read(&(x), sizeof((x))))
+#define P_READ(x) (P_read(&(x), sizeof((x)), #x))
 
 static unsigned P_fdf(int fd) {
   assert(fd>=0 && fd<fdtab.used);
@@ -98,69 +141,102 @@ void T_gettimeofday_hook(void) {
 }
 
 static void Paddr(struct sockaddr *addr, int *lenr) {
-  int l, r;
+  int al, r;
   uint16_t port;
   char buf[512];
   socklen_t sl = *lenr;
 
-  P_READ(l);
-  if (l<0 || l>=sizeof(buf)-1) Pformat("bad addr len");
-  buf[l]= 0;
+  P_READ(al);
+  if (al<0 || al>=sizeof(buf)-1) Pformat("bad addr len");
+  P_read(buf,al,"addrtext");
+  buf[al]= 0;
   P_READ(port);
   r= adns_text2addr(buf,port, adns_qf_addrlit_scope_numeric, addr, &sl);
   if (r==EINVAL) Pformat("bad addr text");
-  assert(r==ENOSPC);
+  assert(r==0 || r==ENOSPC);
   *lenr = sl;
 }
 
 static int Pbytes(byte *buf, int maxlen) {
-  int l;
-  P_READ(l);
-  if (l<0 || l>maxlen) Pformat("bad byte block len");
-  P_read(buf, l);
-  return l;
+  int bl;
+  P_READ(bl);
+  if (bl<0 || bl>maxlen) Pformat("bad byte block len");
+  P_read(buf, bl, "bytes");
+  return bl;
 }
 
-static void Pfdset(fd_set *set, int max) {
-  uint16_t got;
-  int fd, ngot=0;
+static void Pfdset(fd_set *set, int max, int *r_io) {
+  uint16_t fdmap;
+  int fd, nfdmap=0;
+
+  if (!set)
+    return;
+
+  for (fd=max-1; fd>=0; fd--) {
+    if (nfdmap==0) {
+      P_READ(fdmap);
+      nfdmap= 16;
+    }
+    _Bool y = fdmap & 1u;
+    fdmap >>= 1;
+    nfdmap--;
 
-  for (fd=0; fd<max; fd++) {
     if (!FD_ISSET(fd,set)) continue;
+
     P_fdf(fd);
-    if (ngot==0) {
-      P_READ(got);
-      ngot= 16;
-    }
-    if (!(got & 1u)) {
+
+    if (y) {
+      (*r_io)++;
+    } else {
       FD_CLR(fd,set);
     }
-    got >>= 1;
-    ngot--;
   }
 }
 
+#ifdef FUZZRAW_SYNC
+static void Psync(const char *exp, char *got, size_t sz, const char *what) {
+  P_read(got,sz,"syscall");
+  if (memcmp(exp,got,sz)) Pformat(what);
+}
+#endif
+m4_define(`syscall_sync',`
+#ifdef FUZZRAW_SYNC
+  hm_fr_syscall_ident($'`1)
+  static char sync_got[sizeof(sync_expect)];
+  Psync(sync_expect, sync_got, sizeof(sync_got), "sync lost: program did $1");
+#endif
+')
+
 #ifdef HAVE_POLL
-static void Ppollfds(struct pollfd *fds, int nfds) {
-int fd;
+static void Ppollfds(struct pollfd *fds, int nfds, int *r_io) {
+  int fd;
   for (fd=0; fd<nfds; fd++) {
     if (!fds[fd].events) continue;
     P_fdf(fd);
     P_READ(fds[fd].revents);
+    if (fds[fd].revents)
+      (*r_io)++;
   }
 }
 #endif
 
+static int P_succfail(void) {
+  int e;
+  P_READ(e);
+  if (e>0) {
+    errno= e;
+    return -1;
+  } else if (e) {
+    Pformat("wrong errno value");
+  }
+  return 0;
+}
+
 m4_define(`hm_syscall', `
  hm_create_proto_h
 int H$1(hm_args_massage($3,void)) {
  int r;
- m4_define(`hm_rv_fd',`')
- m4_define(`hm_rv_any',`')
- m4_define(`hm_rv_len',`')
- m4_define(`hm_rv_must',`')
- m4_define(`hm_rv_succfail',`')
- m4_define(`hm_rv_fcntl',`')
+ hm_create_nothing
  $2
 
  hm_create_hqcall_vars
@@ -169,20 +245,18 @@ int H$1(hm_args_massage($3,void)) {
  hm_create_hqcall_init($1)
  $3
 
- Tensurerecordfile();
+ Tensuresetup();
+
+ if (traceprint) {
+   hm_create_hqcall_args
+   Q$1(hm_args_massage($3));
+ }
+
+  syscall_sync($'`1)
 
  m4_define(`hm_rv_succfail',`
-  P_READ(r);
-  if (r<0 && -r<Tnerrnos) {
-    errno= Terrnos[-r].v;
-    return -1;
-  } else if (r>0 && r<=255) {
-    errno= r;
-    return -1;
-  } else if (r) {
-    Pformat("wrong errno value");
-  }
-  r= 0;
+  r= P_succfail();
+  if (r<0) return r;
  ')
 
  m4_define(`hm_rv_any',`
@@ -193,12 +267,13 @@ int H$1(hm_args_massage($3,void)) {
   }
  ')
  m4_define(`hm_rv_len',`
-  hm_rv_any
-  if (r>($'`1)) Pformat("syscall length return is excessive");
+  hm_rv_succfail
  ')
  m4_define(`hm_rv_must',`
   r= 0;
  ')
+ m4_define(`hm_rv_select',`hm_rv_succfail')
+ m4_define(`hm_rv_poll',`hm_rv_succfail')
  m4_define(`hm_rv_fcntl',`
   unsigned flg = P_fdf(fd);
   if (cmd == F_GETFL) {
@@ -232,8 +307,8 @@ int H$1(hm_args_massage($3,void)) {
  $2
 
  hm_create_nothing
- m4_define(`hm_arg_fdset_io',`Pfdset($'`1,$'`2);')
- m4_define(`hm_arg_pollfds_io',`Ppollfds($'`1,$'`2);')
+ m4_define(`hm_arg_fdset_io',`Pfdset($'`1,$'`2,&r);')
+ m4_define(`hm_arg_pollfds_io',`Ppollfds($'`1,$'`2,&r);')
  m4_define(`hm_arg_addr_out',`Paddr($'`1,$'`2);')
  $3
 
@@ -241,6 +316,14 @@ int H$1(hm_args_massage($3,void)) {
  m4_define(`hm_arg_bytes_out',`r= Pbytes($'`2,$'`4);')
  $3
 
+ hm_create_nothing
+ m4_define(`hm_rv_selectpoll',`
+  if (($'`1) && !r) Pformat("select/poll returning 0 but infinite timeout");
+ ')
+ m4_define(`hm_rv_select',`hm_rv_selectpoll(!to)')
+ m4_define(`hm_rv_poll',`hm_rv_selectpoll(timeout<0)')
+ $2
+
  return r;
 }
 ')
@@ -250,9 +333,8 @@ m4_define(`hm_specsyscall', `')
 m4_include(`hsyscalls.i4')
 
 int Hclose(int fd) {
-  int r;
+  syscall_sync(close)
   P_fdf(fd);
   fdtab.buf[fd]= 0;
-  hm_rv_succfail
-  return r;
+  return P_succfail();
 }