gprofng: fprintf_styled_func not inizialized for disassembler

gprofng/ChangeLog
2022-04-07  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	* libcollector/unwind.c: inizialize fprintf_styled_func.
	* src/Disasm.cc: Likewise.

gprofng/libcollector/unwind.c

@@ -120,6 +120,14 @@ fprintf_func (void *arg ATTRIBUTE_UNUSED, const char *fmt ATTRIBUTE_UNUSED, ...)
   return 0;
 }
 
+static int
+fprintf_styled_func (void *arg ATTRIBUTE_UNUSED,
+		      enum disassembler_style st ATTRIBUTE_UNUSED,
+		      const char *fmt ATTRIBUTE_UNUSED, ...)
+{
+  return 0;
+}
+
 /* Get LENGTH bytes from info's buffer, at target address memaddr.
    Transfer them to myaddr.  */
 static int
@@ -4347,6 +4355,7 @@ parse_x86_AVX_instruction (unsigned char *pc)
   dis_info.octets_per_byte = 1;
   dis_info.disassembler_needs_relocs = FALSE;
   dis_info.fprintf_func = fprintf_func;
+  dis_info.fprintf_styled_func = fprintf_styled_func;
   dis_info.stream = NULL;
   dis_info.disassembler_options = NULL;
   dis_info.read_memory_func = read_memory_func;

gprofng/src/Disasm.cc

@@ -88,6 +88,21 @@ fprintf_func (void *arg, const char *fmt, ...)
   return cnt;
 }
 
+static int
+fprintf_styled_func (void *arg, enum disassembler_style st ATTRIBUTE_UNUSED,
+		      const char *fmt, ...)
+{
+  char buf[512];
+  va_list vp;
+  va_start (vp, fmt);
+  int cnt = vsnprintf (buf, sizeof (buf), fmt, vp);
+  va_end (vp);
+
+  Disasm *dis = (Disasm *) arg;
+  dis->dis_str->append (buf);
+  return cnt;
+}
+
 /* Get LENGTH bytes from info's buffer, at target address memaddr.
    Transfer them to myaddr.  */
 static int
@@ -165,6 +180,7 @@ Disasm::disasm_open ()
   dis_info.octets_per_byte = 1;
   dis_info.disassembler_needs_relocs = FALSE;
   dis_info.fprintf_func = fprintf_func;
+  dis_info.fprintf_styled_func = fprintf_styled_func;
   dis_info.stream = this;
   dis_info.disassembler_options = NULL;
   dis_info.read_memory_func = read_memory_func;