#include <libunwind.h>
#include <libunwind-ptrace.h>
+#include "src/mc/Process.hpp"
#include "src/mc/mc_unw.h"
-extern "C" {
-
/** \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;
return _UPT_access_mem(as, addr, valp, write, arg);
}
-unw_accessors_t mc_unw_vmread_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
- };
+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 (privatization, 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);
+}
}
+}
