#include "ax.h"
#include "dwarf2loc.h"
#include "dwarf2-frame-tailcall.h"
+#include "gdbsupport/gdb_binary_search.h"
#if GDB_SELF_TEST
#include "gdbsupport/selftest.h"
#include "selftest-arch.h"
#endif
+#include <unordered_map>
#include <algorithm>
unsigned char segment_size;
};
-struct dwarf2_cie_table
-{
- int num_entries;
- struct dwarf2_cie **entries;
-};
+/* The CIE table is used to find CIEs during parsing, but then
+ discarded. It maps from the CIE's offset to the CIE. */
+typedef std::unordered_map<ULONGEST, dwarf2_cie *> dwarf2_cie_table;
/* Frame Description Entry (FDE). */
if (!dwarf2_frame_unwinders_enabled_p)
return 0;
- /* Grab an address that is guarenteed to reside somewhere within the
+ /* Grab an address that is guaranteed to reside somewhere within the
function. get_frame_pc(), with a no-return next function, can
end up returning something past the end of this function's body.
If the frame we're sniffing for is a signal frame whose start
}
\f
-static int
-bsearch_cie_cmp (const void *key, const void *element)
-{
- ULONGEST cie_pointer = *(ULONGEST *) key;
- struct dwarf2_cie *cie = *(struct dwarf2_cie **) element;
-
- if (cie_pointer == cie->cie_pointer)
- return 0;
-
- return (cie_pointer < cie->cie_pointer) ? -1 : 1;
-}
-
/* Find CIE with the given CIE_POINTER in CIE_TABLE. */
static struct dwarf2_cie *
-find_cie (struct dwarf2_cie_table *cie_table, ULONGEST cie_pointer)
+find_cie (const dwarf2_cie_table &cie_table, ULONGEST cie_pointer)
{
- struct dwarf2_cie **p_cie;
-
- /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
- bsearch be non-NULL. */
- if (cie_table->entries == NULL)
- {
- gdb_assert (cie_table->num_entries == 0);
- return NULL;
- }
-
- p_cie = ((struct dwarf2_cie **)
- bsearch (&cie_pointer, cie_table->entries, cie_table->num_entries,
- sizeof (cie_table->entries[0]), bsearch_cie_cmp));
- if (p_cie != NULL)
- return *p_cie;
+ auto iter = cie_table.find (cie_pointer);
+ if (iter != cie_table.end ())
+ return iter->second;
return NULL;
}
-/* Add a pointer to new CIE to the CIE_TABLE, allocating space for it. */
-static void
-add_cie (struct dwarf2_cie_table *cie_table, struct dwarf2_cie *cie)
+static inline int
+bsearch_fde_cmp (const dwarf2_fde *fde, CORE_ADDR seek_pc)
{
- const int n = cie_table->num_entries;
-
- gdb_assert (n < 1
- || cie_table->entries[n - 1]->cie_pointer < cie->cie_pointer);
-
- cie_table->entries
- = XRESIZEVEC (struct dwarf2_cie *, cie_table->entries, n + 1);
- cie_table->entries[n] = cie;
- cie_table->num_entries = n + 1;
-}
-
-static int
-bsearch_fde_cmp (const void *key, const void *element)
-{
- CORE_ADDR seek_pc = *(CORE_ADDR *) key;
- struct dwarf2_fde *fde = *(struct dwarf2_fde **) element;
-
- if (seek_pc < fde->initial_location)
+ if (fde->initial_location + fde->address_range <= seek_pc)
return -1;
- if (seek_pc < fde->initial_location + fde->address_range)
+ if (fde->initial_location <= seek_pc)
return 0;
return 1;
}
for (objfile *objfile : current_program_space->objfiles ())
{
struct dwarf2_fde_table *fde_table;
- struct dwarf2_fde **p_fde;
CORE_ADDR offset;
CORE_ADDR seek_pc;
continue;
seek_pc = *pc - offset;
- p_fde = ((struct dwarf2_fde **)
- bsearch (&seek_pc, fde_table->entries, fde_table->num_entries,
- sizeof (fde_table->entries[0]), bsearch_fde_cmp));
- if (p_fde != NULL)
+ auto end = fde_table->entries + fde_table->num_entries;
+ auto it = gdb::binary_search (fde_table->entries, end, seek_pc, bsearch_fde_cmp);
+ if (it != end)
{
- *pc = (*p_fde)->initial_location + offset;
+ *pc = (*it)->initial_location + offset;
if (out_offset)
*out_offset = offset;
- return *p_fde;
+ return *it;
}
}
return NULL;
static const gdb_byte *decode_frame_entry (struct comp_unit *unit,
const gdb_byte *start,
int eh_frame_p,
- struct dwarf2_cie_table *cie_table,
+ dwarf2_cie_table &cie_table,
struct dwarf2_fde_table *fde_table,
enum eh_frame_type entry_type);
static const gdb_byte *
decode_frame_entry_1 (struct comp_unit *unit, const gdb_byte *start,
int eh_frame_p,
- struct dwarf2_cie_table *cie_table,
+ dwarf2_cie_table &cie_table,
struct dwarf2_fde_table *fde_table,
enum eh_frame_type entry_type)
{
cie->end = end;
cie->unit = unit;
- add_cie (cie_table, cie);
+ cie_table[cie->cie_pointer] = cie;
}
else
{
static const gdb_byte *
decode_frame_entry (struct comp_unit *unit, const gdb_byte *start,
int eh_frame_p,
- struct dwarf2_cie_table *cie_table,
+ dwarf2_cie_table &cie_table,
struct dwarf2_fde_table *fde_table,
enum eh_frame_type entry_type)
{
{
struct comp_unit *unit;
const gdb_byte *frame_ptr;
- struct dwarf2_cie_table cie_table;
+ dwarf2_cie_table cie_table;
struct dwarf2_fde_table fde_table;
struct dwarf2_fde_table *fde_table2;
- cie_table.num_entries = 0;
- cie_table.entries = NULL;
-
fde_table.num_entries = 0;
fde_table.entries = NULL;
frame_ptr = unit->dwarf_frame_buffer;
while (frame_ptr < unit->dwarf_frame_buffer + unit->dwarf_frame_size)
frame_ptr = decode_frame_entry (unit, frame_ptr, 1,
- &cie_table, &fde_table,
+ cie_table, &fde_table,
EH_CIE_OR_FDE_TYPE_ID);
}
fde_table.entries = NULL;
fde_table.num_entries = 0;
}
- /* The cie_table is discarded by the next if. */
+ /* The cie_table is discarded below. */
}
- if (cie_table.num_entries != 0)
- {
- /* Reinit cie_table: debug_frame has different CIEs. */
- xfree (cie_table.entries);
- cie_table.num_entries = 0;
- cie_table.entries = NULL;
- }
+ cie_table.clear ();
}
}
frame_ptr = unit->dwarf_frame_buffer;
while (frame_ptr < unit->dwarf_frame_buffer + unit->dwarf_frame_size)
frame_ptr = decode_frame_entry (unit, frame_ptr, 0,
- &cie_table, &fde_table,
+ cie_table, &fde_table,
EH_CIE_OR_FDE_TYPE_ID);
}
catch (const gdb_exception_error &e)
}
}
fde_table.num_entries = num_old_fde_entries;
- /* The cie_table is discarded by the next if. */
}
}
- /* Discard the cie_table, it is no longer needed. */
- if (cie_table.num_entries != 0)
- {
- xfree (cie_table.entries);
- cie_table.entries = NULL; /* Paranoia. */
- cie_table.num_entries = 0; /* Paranoia. */
- }
-
/* Copy fde_table to obstack: it is needed at runtime. */
fde_table2 = XOBNEW (&objfile->objfile_obstack, struct dwarf2_fde_table);
projects / deliverable / binutils-gdb.git / blobdiff