Fix "Too many return value classes" assert

Patch to ensure e_machine is properly initialized in some cases where
we attach to a running multi-threaded process.

ltrace-0.7.91-emachine-init.patch

@@ -0,0 +1,49 @@
+Patch to ensure e_machine is properly initialized in some cases where
+we attach to a running multi-threaded process.
+
+diff -rup a/proc.c b/proc.c
+--- a/proc.c	2019-02-28 17:32:50.020734842 -0500
++++ b/proc.c	2019-02-28 21:04:31.179942091 -0500
+@@ -38,6 +38,7 @@
+ #include "breakpoint.h"
+ #include "debug.h"
+ #include "fetch.h"
++#include "ltrace-elf.h"
+ #include "options.h"
+ #include "proc.h"
+ #include "value_dict.h"
+@@ -218,6 +219,21 @@ process_init(struct process *proc, const
+ 		return -1;
+ 	}
+ 
++	{
++	       struct ltelf lte;
++
++	       if (ltelf_init(&lte, filename) < 0) {
++		       process_bare_destroy(proc, 0);
++		       goto fail;
++	       }
++
++	       proc->e_machine = lte.ehdr.e_machine;
++	       proc->e_class = lte.ehdr.e_ident[EI_CLASS];
++	       get_arch_dep(proc);
++
++	       ltelf_destroy(&lte);
++       }
++
+ 	if (os_process_init(proc) < 0) {
+ 		process_bare_destroy(proc, 0);
+ 		goto fail;
+diff -rup a/sysdeps/linux-gnu/x86/fetch.c b/sysdeps/linux-gnu/x86/fetch.c
+--- a/sysdeps/linux-gnu/x86/fetch.c	2019-02-28 17:32:50.168810377 -0500
++++ b/sysdeps/linux-gnu/x86/fetch.c	2019-02-28 20:57:32.162800555 -0500
+@@ -275,6 +275,9 @@ allocate_integer(struct fetch_context *c
+ #undef HANDLE32
+ 		}
+ 
++		assert(!"Unknown machine architecture");
++		abort();
++
+ 	case POOL_RETVAL:
+ 		switch (context->ireg) {
+ #ifdef __x86_64__

ltrace.spec

@@ -1,7 +1,7 @@
 Summary: Tracks runtime library calls from dynamically linked executables
 Name: ltrace
 Version: 0.7.91
-Release: 30%{?dist}
+Release: 31%{?dist}
 URL: http://ltrace.alioth.debian.org/
 License: GPLv2+
 
@@ -108,6 +108,9 @@ Patch28: ltrace-0.7.91-aarch64-params.patch
 # gcc-9 fix.  Avoid passing NULL as argument to %s
 Patch29: ltrace-0.7.91-null.patch
 
+# Fix "Too many return value classes" assert
+Patch30: ltrace-0.7.91-emachine-init.patch
+
 %description
 Ltrace is a debugging program which runs a specified command until the
 command exits.  While the command is executing, ltrace intercepts and
@@ -149,6 +152,7 @@ execution of processes.
 %patch27 -p1
 %patch28 -p1
 %patch29 -p1
+%patch30 -p1
 
 %build
 autoreconf -i
@@ -173,6 +177,9 @@ echo ====================TESTING END=====================
 %{_datadir}/ltrace
 
 %changelog
+* Tue Mar 5 2019 Eugene Syromiatnikov <esyr@redhat.com> - 0.7.91-31
+- Fix "Too many return value classes" assert
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.7.91-30
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild