Date: Wed, 19 Feb 2020 14:32:55 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r358109 - head/usr.bin/kdump Message-ID: <202002191432.01JEWttF091411@repo.freebsd.org>
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Author: kevans Date: Wed Feb 19 14:32:55 2020 New Revision: 358109 URL: https://svnweb.freebsd.org/changeset/base/358109 Log: kdump: decode SHM_ANON as first arg to legacy shm_open(2) The first argument to shm_open(2) as well as shm_open2(2) may be a path or SHM_ANON. Decode SHM_ANON, at least- paths will show up as namei results in kdump output, which may be sufficient; in those cases, we'll have printed an address. Future commits will add support for shm_open2() to libsysdecode/truss/kdump. Reported by: kaktus MFC after: 3 days Modified: head/usr.bin/kdump/kdump.c Modified: head/usr.bin/kdump/kdump.c ============================================================================== --- head/usr.bin/kdump/kdump.c Wed Feb 19 14:29:47 2020 (r358108) +++ head/usr.bin/kdump/kdump.c Wed Feb 19 14:32:55 2020 (r358109) @@ -55,6 +55,7 @@ __FBSDID("$FreeBSD$"); #include <sys/uio.h> #include <sys/event.h> #include <sys/ktrace.h> +#include <sys/mman.h> #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/stat.h> @@ -1248,7 +1249,12 @@ ktrsyscall(struct ktr_syscall *ktr, u_int sv_flags) break; #ifdef SYS_freebsd12_shm_open case SYS_freebsd12_shm_open: - print_number(ip, narg, c); + if (ip[0] == (uintptr_t)SHM_ANON) { + printf("(SHM_ANON"); + ip++; + } else { + print_number(ip, narg, c); + } putchar(','); print_mask_arg(sysdecode_open_flags, ip[0]); putchar(',');
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