/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 2015-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "defs.h"
+#include "print_fields.h"
#include "xlat/kcmp_types.h"
+struct strace_kcmp_epoll_slot {
+ uint32_t efd;
+ uint32_t tfd;
+ uint32_t toff;
+};
+
+static void
+printpidfd(struct tcb *tcp, pid_t pid, int fd)
+{
+ /*
+ * XXX We want to use printfd here, but we should figure out which
+ * process in strace's PID NS is referred to first.
+ */
+ tprintf("%d", fd);
+}
+
+#define PRINT_FIELD_PIDFD(prefix_, where_, field_, tcp_, pid_) \
+ do { \
+ STRACE_PRINTF("%s%s=", (prefix_), #field_); \
+ printpidfd((tcp_), (pid_), (where_).field_); \
+ } while (0)
+
SYS_FUNC(kcmp)
{
pid_t pid1 = tcp->u_arg[0];
pid_t pid2 = tcp->u_arg[1];
int type = tcp->u_arg[2];
- unsigned long long idx1 = getarg_ull(tcp, 3);
- unsigned long long idx2 = getarg_ull(tcp, 4);
+ kernel_ulong_t idx1 = tcp->u_arg[3];
+ kernel_ulong_t idx2 = tcp->u_arg[4];
tprintf("%d, %d, ", pid1, pid2);
printxval(kcmp_types, type, "KCMP_???");
- switch(type) {
+ switch (type) {
case KCMP_FILE:
- tprintf(", %u, %u", (unsigned) idx1, (unsigned) idx2);
+ tprints(", ");
+ printpidfd(tcp, pid1, idx1);
+ tprints(", ");
+ printpidfd(tcp, pid1, idx2);
+
break;
+
+ case KCMP_EPOLL_TFD: {
+ struct strace_kcmp_epoll_slot slot;
+
+ tprints(", ");
+ printpidfd(tcp, pid1, idx1);
+ tprints(", ");
+
+ if (umove_or_printaddr(tcp, idx2, &slot))
+ break;
+
+ PRINT_FIELD_PIDFD("{", slot, efd, tcp, pid2);
+ PRINT_FIELD_PIDFD(", ", slot, tfd, tcp, pid2);
+ PRINT_FIELD_U(", ", slot, toff);
+ tprints("}");
+
+ break;
+ }
+
case KCMP_FILES:
case KCMP_FS:
case KCMP_IO:
case KCMP_VM:
break;
default:
- tprintf(", %#llx, %#llx", idx1, idx2);
+ tprintf(", %#" PRI_klx ", %#" PRI_klx, idx1, idx2);
}
return RVAL_DECODED;