Add libdtrace support for tracing userland programs.

Summary of changes:
* Implement a compatibility shim between Solaris libproc and our
libproc and remove several ifdefs because of this.
* Port the drti to FreeBSD.
* Implement the missing DOODAD sections
* Link with libproc and librtld_db
* Support for ustack, jstack and uregs (by sson@)
* Misc bugfixing

When writing the SUWN_dof section, we had to resort to building the ELF
file layout by "hand". This is the job of libelf, but our libelf doesn't
support this yet. When libelf is fixed, we can remove the code under
#ifdef BROKEN_LIBELF.

Sponsored by:	The FreeBSD Foundation

1 files changed, 21 insertions, 3 deletions

diff --git a/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c b/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
index 2580e63..63721ab 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
@@ -773,19 +773,27 @@ compile_str(dtrace_cmd_t *dcp)
 static void
 prochandler(struct ps_prochandle *P, const char *msg, void *arg)
 {
-fatal("DOODAD in function %s, file %s, line %d\n",__FUNCTION__,__FILE__,__LINE__);
-#ifdef DOODAD
+#if defined(sun)
 	const psinfo_t *prp = Ppsinfo(P);
 	int pid = Pstatus(P)->pr_pid;
 	char name[SIG2STR_MAX];
+#else
+	int wstatus = proc_getwstat(P);
+	int pid = proc_getpid(P);
+#endif
 
 	if (msg != NULL) {
 		notice("pid %d: %s\n", pid, msg);
 		return;
 	}
 
+#if defined(sun)
 	switch (Pstate(P)) {
+#else
+	switch (proc_state(P)) {
+#endif
 	case PS_UNDEAD:
+#if defined(sun)
 		/*
 		 * Ideally we would like to always report pr_wstat here, but it
 		 * isn't possible given current /proc semantics.  If we grabbed
@@ -798,9 +806,20 @@ fatal("DOODAD in function %s, file %s, line %d\n",__FUNCTION__,__FILE__,__LINE__
 			notice("pid %d terminated by %s\n", pid,
 			    proc_signame(WTERMSIG(prp->pr_wstat),
 			    name, sizeof (name)));
+#else
+		if (WIFSIGNALED(wstatus)) {
+			notice("pid %d terminated by %d\n", pid,
+			    WTERMSIG(wstatus));
+#endif
+#if defined(sun)
 		} else if (prp != NULL && WEXITSTATUS(prp->pr_wstat) != 0) {
 			notice("pid %d exited with status %d\n",
 			    pid, WEXITSTATUS(prp->pr_wstat));
+#else
+		} else if (WEXITSTATUS(wstatus) != 0) {
+			notice("pid %d exited with status %d\n",
+			    pid, WEXITSTATUS(wstatus));
+#endif
 		} else {
 			notice("pid %d has exited\n", pid);
 		}
@@ -812,7 +831,6 @@ fatal("DOODAD in function %s, file %s, line %d\n",__FUNCTION__,__FILE__,__LINE__
 		g_pslive--;
 		break;
 	}
-#endif
 }
 
 /*ARGSUSED*/