+/* Copyright (c) 2015. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include <sys/types.h>
#include <sys/uio.h>
+#include <fcntl.h>
#include <libunwind.h>
#include <libunwind-ptrace.h>
-#include "mc_unw.h"
-
-extern "C" {
+#include "src/mc/Process.hpp"
+#include "src/mc/mc_unw.h"
/** \file
* Libunwind namespace implementation using process_vm_readv.
/** Partial structure of libunwind-ptrace context in order to get the PID
*
- * The context type for libunwind-race is an opaque type. We need to get the
- * PID which is the first field. This is a hack which might break if the
- * libunwind-ptrace structure changes.
+ * HACK, The context type for libunwind-race is an opaque type.
+ * We need to get the PID which is the first field. This is a hack
+ * which might break if the libunwind-ptrace structure changes.
*/
struct _UPT_info {
pid_t pid;
{
if (write)
return - UNW_EINVAL;
- ssize_t s;
pid_t pid = _UPT_getpid(arg);
size_t size = sizeof(unw_word_t);
-#ifdef HAVE_PROCESS_VM_READV
+#if HAVE_PROCESS_VM_READV
// process_vm_read implementation.
// This is only available since Linux 3.2.
struct iovec local = { valp, size };
struct iovec remote = { (void*) addr, size };
- s = process_vm_readv(pid, &local, 1, &remote, 1, 0);
+ ssize_t s = process_vm_readv(pid, &local, 1, &remote, 1, 0);
if (s >= 0) {
if ((size_t) s != size)
return - UNW_EINVAL;
size_t count = size;
off_t off = (off_t) addr;
char* buf = (char*) valp;
- int fd = MC_process_vm_open(pid, O_RDONLY);
+ int fd = simgrid::mc::open_vm(pid, O_RDONLY);
if (fd < 0)
return - UNW_EINVAL;
while (1) {
return _UPT_access_mem(as, addr, valp, write, arg);
}
-unw_accessors_t mc_unw_vmread_accessors =
- {
- .find_proc_info = &_UPT_find_proc_info,
- .put_unwind_info = &_UPT_put_unwind_info,
- .get_dyn_info_list_addr = &_UPT_get_dyn_info_list_addr,
- .access_mem = &access_mem,
- .access_reg = &_UPT_access_reg,
- .access_fpreg = &_UPT_access_fpreg,
- .resume = &_UPT_resume,
- .get_proc_name = &_UPT_get_proc_name
- };
+namespace simgrid {
+namespace unw {
+
+/** Virtual table for our `libunwind-process_vm_readv` implementation.
+ *
+ * This implementation reuse most the code of `libunwind-ptrace` but
+ * does not use ptrace() to read the target process memory by
+ * `process_vm_readv()` or `/dev/${pid}/mem` if possible.
+ *
+ * Does not support any MC-specific behaviour (privatisation, snapshots)
+ * and `ucontext_t`.
+ *
+ * It works with `void*` contexts allocated with `_UPT_create(pid)`.
+ */
+// TODO, we could get rid of this if we properly stop the model-checked
+// process before reading the memory.
+static unw_accessors_t accessors = {
+ &_UPT_find_proc_info,
+ &_UPT_put_unwind_info,
+ &_UPT_get_dyn_info_list_addr,
+ &access_mem,
+ &_UPT_access_reg,
+ &_UPT_access_fpreg,
+ &_UPT_resume,
+ &_UPT_get_proc_name
+};
+
+unw_addr_space_t create_addr_space()
+{
+ return unw_create_addr_space(&accessors, BYTE_ORDER);
+}
+
+void* create_context(unw_addr_space_t as, pid_t pid)
+{
+ return _UPT_create(pid);
+}
}
+}