/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
return size;
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
int
regcache_register_size (const struct regcache *regcache, int n)
}
}
-regcache::regcache (gdbarch *gdbarch, const address_space *aspace_)
+regcache::regcache (process_stratum_target *target, gdbarch *gdbarch,
+ const address_space *aspace_)
/* The register buffers. A read/write register cache can only hold
[0 .. gdbarch_num_regs). */
- : detached_regcache (gdbarch, false), m_aspace (aspace_)
+ : detached_regcache (gdbarch, false), m_aspace (aspace_), m_target (target)
{
m_ptid = minus_one_ptid;
}
return m_descr->gdbarch;
}
-/* Cleanup class for invalidating a register. */
-
-class regcache_invalidator
-{
-public:
-
- regcache_invalidator (struct regcache *regcache, int regnum)
- : m_regcache (regcache),
- m_regnum (regnum)
- {
- }
-
- ~regcache_invalidator ()
- {
- if (m_regcache != nullptr)
- m_regcache->invalidate (m_regnum);
- }
-
- DISABLE_COPY_AND_ASSIGN (regcache_invalidator);
-
- void release ()
- {
- m_regcache = nullptr;
- }
-
-private:
-
- struct regcache *m_regcache;
- int m_regnum;
-};
-
/* Return a pointer to register REGNUM's buffer cache. */
gdb_byte *
}
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
enum register_status
reg_buffer::get_register_status (int regnum) const
std::forward_list<regcache *> regcache::current_regcache;
struct regcache *
-get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch,
+get_thread_arch_aspace_regcache (process_stratum_target *target,
+ ptid_t ptid, struct gdbarch *gdbarch,
struct address_space *aspace)
{
+ gdb_assert (target != nullptr);
+
for (const auto ®cache : regcache::current_regcache)
- if (regcache->ptid () == ptid && regcache->arch () == gdbarch)
+ if (regcache->target () == target
+ && regcache->ptid () == ptid
+ && regcache->arch () == gdbarch)
return regcache;
- regcache *new_regcache = new regcache (gdbarch, aspace);
+ regcache *new_regcache = new regcache (target, gdbarch, aspace);
regcache::current_regcache.push_front (new_regcache);
new_regcache->set_ptid (ptid);
}
struct regcache *
-get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch)
+get_thread_arch_regcache (process_stratum_target *target, ptid_t ptid,
+ struct gdbarch *gdbarch)
{
+ scoped_restore_current_inferior restore_current_inferior;
+ set_current_inferior (find_inferior_ptid (target, ptid));
address_space *aspace = target_thread_address_space (ptid);
- return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace);
+ return get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace);
}
+static process_stratum_target *current_thread_target;
static ptid_t current_thread_ptid;
static struct gdbarch *current_thread_arch;
struct regcache *
-get_thread_regcache (ptid_t ptid)
+get_thread_regcache (process_stratum_target *target, ptid_t ptid)
{
- if (!current_thread_arch || current_thread_ptid != ptid)
+ if (!current_thread_arch
+ || target != current_thread_target
+ || current_thread_ptid != ptid)
{
+ gdb_assert (ptid != null_ptid);
+
current_thread_ptid = ptid;
+ current_thread_target = target;
+
+ scoped_restore_current_inferior restore_current_inferior;
+ set_current_inferior (find_inferior_ptid (target, ptid));
current_thread_arch = target_thread_architecture (ptid);
}
- return get_thread_arch_regcache (ptid, current_thread_arch);
+ return get_thread_arch_regcache (target, ptid, current_thread_arch);
}
/* See regcache.h. */
struct regcache *
get_thread_regcache (thread_info *thread)
{
- return get_thread_regcache (thread->ptid);
+ return get_thread_regcache (thread->inf->process_target (),
+ thread->ptid);
}
struct regcache *
return get_thread_regcache (inferior_thread ());
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
struct regcache *
get_thread_regcache_for_ptid (ptid_t ptid)
{
- return get_thread_regcache (ptid);
+ /* This function doesn't take a process_stratum_target parameter
+ because it's a gdbsupport/ routine implemented by both gdb and
+ gdbserver. It always refers to a ptid of the current target. */
+ process_stratum_target *proc_target = current_inferior ()->process_target ();
+ return get_thread_regcache (proc_target, ptid);
}
/* Observer for the target_changed event. */
Indicate that registers may have changed, so invalidate the cache. */
void
-registers_changed_ptid (ptid_t ptid)
+registers_changed_ptid (process_stratum_target *target, ptid_t ptid)
{
for (auto oit = regcache::current_regcache.before_begin (),
it = std::next (oit);
it != regcache::current_regcache.end ();
)
{
- if ((*it)->ptid ().matches (ptid))
+ struct regcache *regcache = *it;
+ if ((target == nullptr || regcache->target () == target)
+ && regcache->ptid ().matches (ptid))
{
- delete *it;
+ delete regcache;
it = regcache::current_regcache.erase_after (oit);
}
else
oit = it++;
}
- if (current_thread_ptid.matches (ptid))
+ if ((target == nullptr || current_thread_target == target)
+ && current_thread_ptid.matches (ptid))
{
+ current_thread_target = NULL;
current_thread_ptid = null_ptid;
current_thread_arch = NULL;
}
- if (inferior_ptid.matches (ptid))
+ if ((target == nullptr || current_inferior ()->process_target () == target)
+ && inferior_ptid.matches (ptid))
{
/* We just deleted the regcache of the current thread. Need to
forget about any frames we have cached, too. */
void
registers_changed_thread (thread_info *thread)
{
- registers_changed_ptid (thread->ptid);
+ registers_changed_ptid (thread->inf->process_target (), thread->ptid);
}
void
registers_changed (void)
{
- registers_changed_ptid (minus_one_ptid);
-
- /* Force cleanup of any alloca areas if using C alloca instead of
- a builtin alloca. This particular call is used to clean up
- areas allocated by low level target code which may build up
- during lengthy interactions between gdb and the target before
- gdb gives control to the user (ie watchpoints). */
- alloca (0);
+ registers_changed_ptid (nullptr, minus_one_ptid);
}
void
/* Invalidate the register after it is written, in case of a
failure. */
- regcache_invalidator invalidator (this, regnum);
+ auto invalidator
+ = make_scope_exit ([&] { this->invalidate (regnum); });
target_store_registers (this, regnum);
write_part (regnum, offset, len, buf, false);
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
void
reg_buffer::raw_supply (int regnum, const void *buf)
m_register_status[regnum] = REG_VALID;
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
void
reg_buffer::raw_collect (int regnum, void *buf) const
transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size);
}
-/* See common/common-regcache.h. */
+/* See gdbsupport/common-regcache.h. */
bool
reg_buffer::raw_compare (int regnum, const void *buf, int offset) const
}
#if GDB_SELF_TEST
-#include "selftest.h"
+#include "gdbsupport/selftest.h"
#include "selftest-arch.h"
-#include "gdbthread.h"
#include "target-float.h"
namespace selftests {
}
};
+/* Wrapper around get_thread_arch_aspace_regcache that does some self checks. */
+
+static void
+test_get_thread_arch_aspace_regcache (process_stratum_target *target,
+ ptid_t ptid, struct gdbarch *gdbarch,
+ address_space *aspace)
+{
+ struct regcache *regcache
+ = get_thread_arch_aspace_regcache (target, ptid, gdbarch, aspace);
+ SELF_CHECK (regcache != NULL);
+ SELF_CHECK (regcache->target () == target);
+ SELF_CHECK (regcache->ptid () == ptid);
+ SELF_CHECK (regcache->aspace () == aspace);
+}
+
static void
current_regcache_test (void)
{
ptid_t ptid1 (1), ptid2 (2), ptid3 (3);
- /* Get regcache from ptid1, a new regcache is added to
- current_regcache. */
- regcache *regcache = get_thread_arch_aspace_regcache (ptid1,
- target_gdbarch (),
- NULL);
+ test_target_ops test_target1;
+ test_target_ops test_target2;
- SELF_CHECK (regcache != NULL);
- SELF_CHECK (regcache->ptid () == ptid1);
+ /* Get regcache from (target1,ptid1), a new regcache is added to
+ current_regcache. */
+ test_get_thread_arch_aspace_regcache (&test_target1, ptid1,
+ target_gdbarch (),
+ NULL);
SELF_CHECK (regcache_access::current_regcache_size () == 1);
- /* Get regcache from ptid2, a new regcache is added to
+ /* Get regcache from (target1,ptid2), a new regcache is added to
current_regcache. */
- regcache = get_thread_arch_aspace_regcache (ptid2,
- target_gdbarch (),
- NULL);
- SELF_CHECK (regcache != NULL);
- SELF_CHECK (regcache->ptid () == ptid2);
+ test_get_thread_arch_aspace_regcache (&test_target1, ptid2,
+ target_gdbarch (),
+ NULL);
SELF_CHECK (regcache_access::current_regcache_size () == 2);
- /* Get regcache from ptid3, a new regcache is added to
+ /* Get regcache from (target1,ptid3), a new regcache is added to
current_regcache. */
- regcache = get_thread_arch_aspace_regcache (ptid3,
- target_gdbarch (),
- NULL);
- SELF_CHECK (regcache != NULL);
- SELF_CHECK (regcache->ptid () == ptid3);
+ test_get_thread_arch_aspace_regcache (&test_target1, ptid3,
+ target_gdbarch (),
+ NULL);
SELF_CHECK (regcache_access::current_regcache_size () == 3);
- /* Get regcache from ptid2 again, nothing is added to
+ /* Get regcache from (target1,ptid2) again, nothing is added to
current_regcache. */
- regcache = get_thread_arch_aspace_regcache (ptid2,
- target_gdbarch (),
- NULL);
- SELF_CHECK (regcache != NULL);
- SELF_CHECK (regcache->ptid () == ptid2);
+ test_get_thread_arch_aspace_regcache (&test_target1, ptid2,
+ target_gdbarch (),
+ NULL);
SELF_CHECK (regcache_access::current_regcache_size () == 3);
- /* Mark ptid2 is changed, so regcache of ptid2 should be removed from
- current_regcache. */
- registers_changed_ptid (ptid2);
- SELF_CHECK (regcache_access::current_regcache_size () == 2);
+ /* Get regcache from (target2,ptid2), a new regcache is added to
+ current_regcache, since this time we're using a differen
+ target. */
+ test_get_thread_arch_aspace_regcache (&test_target2, ptid2,
+ target_gdbarch (),
+ NULL);
+ SELF_CHECK (regcache_access::current_regcache_size () == 4);
+
+ /* Mark that (target1,ptid2) changed. The regcache of (target1,
+ ptid2) should be removed from current_regcache. */
+ registers_changed_ptid (&test_target1, ptid2);
+ SELF_CHECK (regcache_access::current_regcache_size () == 3);
+
+ /* Get the regcache from (target2,ptid2) again, confirming the
+ registers_changed_ptid call above did not delete it. */
+ test_get_thread_arch_aspace_regcache (&test_target2, ptid2,
+ target_gdbarch (),
+ NULL);
+ SELF_CHECK (regcache_access::current_regcache_size () == 3);
+
+ /* Confirm that marking all regcaches of all targets as changed
+ clears current_regcache. */
+ registers_changed_ptid (nullptr, minus_one_ptid);
+ SELF_CHECK (regcache_access::current_regcache_size () == 0);
}
class target_ops_no_register : public test_target_ops
class readwrite_regcache : public regcache
{
public:
- readwrite_regcache (struct gdbarch *gdbarch)
- : regcache (gdbarch, nullptr)
+ readwrite_regcache (process_stratum_target *target,
+ struct gdbarch *gdbarch)
+ : regcache (target, gdbarch, nullptr)
{}
};
mock_inferior.gdbarch = gdbarch;
mock_inferior.aspace = &mock_aspace;
thread_info mock_thread (&mock_inferior, mock_ptid);
+ mock_inferior.thread_map[mock_ptid] = &mock_thread;
/* Add the mock inferior to the inferior list so that look ups by
target+ptid can find it. */
break;
}
- readwrite_regcache readwrite (gdbarch);
+ readwrite_regcache readwrite (&mock_target, gdbarch);
gdb::def_vector<gdb_byte> buf (register_size (gdbarch, nonzero_regnum));
readwrite.raw_read (nonzero_regnum, buf.data ());
SELF_CHECK (mock_target.fetch_registers_called == 0);
SELF_CHECK (mock_target.store_registers_called == 0);
-
- /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */
- if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
- SELF_CHECK (mock_target.xfer_partial_called == 0);
+ SELF_CHECK (mock_target.xfer_partial_called == 0);
mock_target.reset ();
}
}
} pop_targets;
- readwrite_regcache readwrite (gdbarch);
+ readwrite_regcache readwrite (&mock_target, gdbarch);
const int num_regs = gdbarch_num_cooked_regs (gdbarch);
auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
- if ((bfd_arch == bfd_arch_sparc
- /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM,
- SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */
- && gdbarch_ptr_bit (gdbarch) == 64
- && (regnum >= gdbarch_num_regs (gdbarch)
- && regnum <= gdbarch_num_regs (gdbarch) + 4))
- || (bfd_arch == bfd_arch_spu
- /* SPU pseudo registers except SPU_SP_REGNUM are got by
- TARGET_OBJECT_SPU. */
- && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130))
+ if (bfd_arch == bfd_arch_sparc
+ /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM,
+ SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */
+ && gdbarch_ptr_bit (gdbarch) == 64
+ && (regnum >= gdbarch_num_regs (gdbarch)
+ && regnum <= gdbarch_num_regs (gdbarch) + 4))
continue;
std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0);
(regcache::regcache_thread_ptid_changed);
add_com ("flushregs", class_maintenance, reg_flush_command,
- _("Force gdb to flush its register cache (maintainer command)"));
+ _("Force gdb to flush its register cache (maintainer command)."));
#if GDB_SELF_TEST
selftests::register_test ("current_regcache", selftests::current_regcache_test);
projects / deliverable / binutils-gdb.git / blobdiff