D17461.diff
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	Index: head/usr.bin/truss/syscall.h
	===================================================================
	--- head/usr.bin/truss/syscall.h
	+++ head/usr.bin/truss/syscall.h
	@@ -151,6 +151,7 @@
	PQuadHex,
	PUInt,
	Readlinkres,
	+ ShmName,
	StringArray,

	/* Pointers to structures. */
	Index: head/usr.bin/truss/syscalls.c
	===================================================================
	--- head/usr.bin/truss/syscalls.c
	+++ head/usr.bin/truss/syscalls.c
	@@ -44,6 +44,7 @@
	#define _WANT_FREEBSD11_KEVENT
	#include <sys/event.h>
	#include <sys/ioccom.h>
	+#include <sys/mman.h>
	#include <sys/mount.h>
	#include <sys/ptrace.h>
	#include <sys/resource.h>
	@@ -462,7 +463,7 @@
	.args = { { Int, 0 }, { Sockoptlevel, 1 }, { Sockoptname, 2 },
	{ Ptr \| IN, 3 }, { Socklent, 4 } } },
	{ .name = "shm_open", .ret_type = 1, .nargs = 3,
	- .args = { { Name \| IN, 0 }, { Open, 1 }, { Octal, 2 } } },
	+ .args = { { ShmName \| IN, 0 }, { Open, 1 }, { Octal, 2 } } },
	{ .name = "shm_unlink", .ret_type = 1, .nargs = 1,
	.args = { { Name \| IN, 0 } } },
	{ .name = "shutdown", .ret_type = 1, .nargs = 2,
	@@ -1593,6 +1594,13 @@
	case Sizet:
	fprintf(fp, "%zu", (size_t)args[sc->offset]);
	break;
	+ case ShmName:
	+ /* Handle special SHM_ANON value. */
	+ if ((char *)args[sc->offset] == SHM_ANON) {
	+ fprintf(fp, "SHM_ANON");
	+ break;
	+ }
	+ /* FALLTHROUGH */
	case Name: {
	/* NULL-terminated string. */
	char *tmp2;