Date: Sun, 23 Aug 2020 19:28:09 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r364508 - stable/12/sys/amd64/linux Message-ID: <202008231928.07NJS96o062663@repo.freebsd.org>
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Author: trasz Date: Sun Aug 23 19:28:09 2020 New Revision: 364508 URL: https://svnweb.freebsd.org/changeset/base/364508 Log: MFC r349748: Add support for PTRACE_O_TRACEEXIT to linuxulator ptrace(2). This fixes strace 4.25 from Ubuntu 19.04. Sponsored by: The FreeBSD Foundation Modified: stable/12/sys/amd64/linux/linux_ptrace.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/amd64/linux/linux_ptrace.c ============================================================================== --- stable/12/sys/amd64/linux/linux_ptrace.c Sun Aug 23 19:26:46 2020 (r364507) +++ stable/12/sys/amd64/linux/linux_ptrace.c Sun Aug 23 19:28:09 2020 (r364508) @@ -72,6 +72,8 @@ __FBSDID("$FreeBSD$"); #define LINUX_PTRACE_GETREGSET 0x4204 #define LINUX_PTRACE_SEIZE 0x4206 +#define LINUX_PTRACE_EVENT_EXIT 6 + #define LINUX_PTRACE_O_TRACESYSGOOD 1 #define LINUX_PTRACE_O_TRACEFORK 2 #define LINUX_PTRACE_O_TRACEVFORK 4 @@ -139,6 +141,9 @@ linux_ptrace_status(struct thread *td, pid_t pid, int if ((pem->ptrace_flags & LINUX_PTRACE_O_TRACESYSGOOD) && lwpinfo.pl_flags & PL_FLAG_SCX) status |= (LINUX_SIGTRAP | 0x80) << 8; + if ((pem->ptrace_flags & LINUX_PTRACE_O_TRACEEXIT) && + lwpinfo.pl_flags & PL_FLAG_EXITED) + status |= (LINUX_SIGTRAP | LINUX_PTRACE_EVENT_EXIT << 8) << 8; LINUX_PEM_SUNLOCK(pem); return (status); @@ -359,9 +364,9 @@ linux_ptrace_setoptions(struct thread *td, pid_t pid, mask |= PTRACE_VFORK; /* XXX: Close enough? */ if (data & LINUX_PTRACE_O_TRACEEXIT) { - linux_msg(td, "PTRACE_O_TRACEEXIT not implemented; " - "returning EINVAL"); - return (EINVAL); + pem->ptrace_flags |= LINUX_PTRACE_O_TRACEEXIT; + } else { + pem->ptrace_flags &= ~LINUX_PTRACE_O_TRACEEXIT; } return (kern_ptrace(td, PT_SET_EVENT_MASK, pid, &mask, sizeof(mask)));
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