ubsan: nds32: left shift cannot be represented in type 'int'

[deliverable/binutils-gdb.git] / gdb / dwarf2-frame.h

diff --git a/gdb/dwarf2-frame.h b/gdb/dwarf2-frame.h
index c952a20e87c252eee84312146d79d1a51fcc7529..d6dbeffd876a7114c26812af3cab9069516f5ed7 100644 (file)
--- a/gdb/dwarf2-frame.h
+++ b/gdb/dwarf2-frame.h
@@ -1,6 +1,6 @@
 /* Frame unwinder for frames with DWARF Call Frame Information.
 
-   Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   Copyright (C) 2003-2019 Free Software Foundation, Inc.
 
    Contributed by Mark Kettenis.
 
@@ -41,7 +41,7 @@ enum dwarf2_frame_reg_rule
   DWARF2_FRAME_REG_UNSPECIFIED = 0,
 
   /* The term "undefined" comes from the DWARF2 CFI spec which this
-     code is moddeling; it indicates that the register's value is
+     code is modeling; it indicates that the register's value is
      "undefined".  GCC uses the less formal term "unsaved".  Its
      definition is a combination of REG_UNDEFINED and REG_UNSPECIFIED.
      The failure to differentiate the two helps explain a few problems
@@ -94,16 +94,72 @@ enum cfa_how_kind
 
 struct dwarf2_frame_state_reg_info
 {
-  struct dwarf2_frame_state_reg *reg;
-  int num_regs;
-
-  LONGEST cfa_offset;
-  ULONGEST cfa_reg;
-  enum cfa_how_kind cfa_how;
-  const gdb_byte *cfa_exp;
+  dwarf2_frame_state_reg_info () = default;
+  ~dwarf2_frame_state_reg_info ()
+  {
+    delete prev;
+  }
+
+  /* Copy constructor.  */
+  dwarf2_frame_state_reg_info (const dwarf2_frame_state_reg_info &src)
+    : reg (src.reg), cfa_offset (src.cfa_offset),
+      cfa_reg (src.cfa_reg), cfa_how (src.cfa_how), cfa_exp (src.cfa_exp),
+      prev (src.prev)
+  {
+  }
+
+  /* Assignment operator for both move-assignment and copy-assignment.  */
+  dwarf2_frame_state_reg_info&
+  operator= (dwarf2_frame_state_reg_info rhs)
+  {
+    swap (*this, rhs);
+    return *this;
+  }
+
+  /* Move constructor.  */
+  dwarf2_frame_state_reg_info (dwarf2_frame_state_reg_info &&rhs) noexcept
+    : reg (std::move (rhs.reg)), cfa_offset (rhs.cfa_offset),
+      cfa_reg (rhs.cfa_reg), cfa_how (rhs.cfa_how), cfa_exp (rhs.cfa_exp),
+      prev (rhs.prev)
+  {
+    rhs.prev = nullptr;
+  }
+
+  /* If necessary, enlarge the register set to hold NUM_REGS_REQUESTED
+     registers.  */
+  void alloc_regs (int num_regs_requested)
+  {
+    gdb_assert (num_regs_requested > 0);
+
+    if (num_regs_requested <= reg.size ())
+      return;
+
+    reg.resize (num_regs_requested);
+  }
+
+  std::vector<struct dwarf2_frame_state_reg> reg;
+
+  LONGEST cfa_offset = 0;
+  ULONGEST cfa_reg = 0;
+  enum cfa_how_kind cfa_how = CFA_UNSET;
+  const gdb_byte *cfa_exp = NULL;
 
   /* Used to implement DW_CFA_remember_state.  */
-  struct dwarf2_frame_state_reg_info *prev;
+  struct dwarf2_frame_state_reg_info *prev = NULL;
+
+private:
+  friend void swap (dwarf2_frame_state_reg_info& lhs,
+                   dwarf2_frame_state_reg_info& rhs)
+  {
+    using std::swap;
+
+    swap (lhs.reg, rhs.reg);
+    swap (lhs.cfa_offset, rhs.cfa_offset);
+    swap (lhs.cfa_reg, rhs.cfa_reg);
+    swap (lhs.cfa_how, rhs.cfa_how);
+    swap (lhs.cfa_exp, rhs.cfa_exp);
+    swap (lhs.prev, rhs.prev);
+  }
 };
 
 struct dwarf2_cie;
@@ -113,7 +169,6 @@ struct dwarf2_cie;
 struct dwarf2_frame_state
 {
   dwarf2_frame_state (CORE_ADDR pc, struct dwarf2_cie *cie);
-  ~dwarf2_frame_state ();
 
   /* Each register save state can be described in terms of a CFA slot,
      another register, or a location expression.  */
@@ -142,6 +197,12 @@ struct dwarf2_frame_state
   bool armcc_cfa_offsets_reversed = false;
 };
 
+/* When this is true the DWARF frame unwinders can be used if they are
+   registered with the gdbarch.  Not all architectures can or do use the
+   DWARF unwinders.  Setting this to true on a target that does not
+   otherwise support the DWARF unwinders has no effect.  */
+extern bool dwarf2_frame_unwinders_enabled_p;
+
 /* Set the architecture-specific register state initialization
    function for GDBARCH to INIT_REG.  */
 
@@ -180,12 +241,6 @@ extern const struct frame_base *
 
 CORE_ADDR dwarf2_frame_cfa (struct frame_info *this_frame);
 
-/* Assert that the register set RS is large enough to store gdbarch_num_regs
-   columns.  If necessary, enlarge the register set.  */
-
-void dwarf2_frame_state_alloc_regs (struct dwarf2_frame_state_reg_info *rs,
-                                   int num_regs);
-
 /* Find the CFA information for PC.
 
    Return 1 if a register is used for the CFA, or 0 if another