gdbstub: Prefer cached CpuClass over CPU_GET_CLASS() macro

CpuState caches its CPUClass since commit 6fbdff87062
("cpu: cache CPUClass in CPUState for hot code paths"),
use it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250122093028.52416-9-philmd@linaro.org>

gdbstub/gdbstub.c

@@ -354,7 +354,6 @@ static const char *get_feature_xml(const char *p, const char **newp,
                                    GDBProcess *process)
 {
     CPUState *cpu = gdb_get_first_cpu_in_process(process);
-    CPUClass *cc = CPU_GET_CLASS(cpu);
     GDBRegisterState *r;
     size_t len;
 
@@ -377,11 +376,11 @@ static const char *get_feature_xml(const char *p, const char **newp,
                          "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
                          "<target>"));
 
-            if (cc->gdb_arch_name) {
+            if (cpu->cc->gdb_arch_name) {
                 g_ptr_array_add(
                     xml,
                     g_markup_printf_escaped("<architecture>%s</architecture>",
-                                            cc->gdb_arch_name(cpu)));
+                                            cpu->cc->gdb_arch_name(cpu)));
             }
             for (guint i = 0; i < cpu->gdb_regs->len; i++) {
                 r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
@@ -520,11 +519,10 @@ GArray *gdb_get_register_list(CPUState *cpu)
 
 int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
 {
-    CPUClass *cc = CPU_GET_CLASS(cpu);
     GDBRegisterState *r;
 
-    if (reg < cc->gdb_num_core_regs) {
+    if (reg < cpu->cc->gdb_num_core_regs) {
-        return cc->gdb_read_register(cpu, buf, reg);
+        return cpu->cc->gdb_read_register(cpu, buf, reg);
     }
 
     for (guint i = 0; i < cpu->gdb_regs->len; i++) {
@@ -538,11 +536,10 @@ int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
 
 static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg)
 {
-    CPUClass *cc = CPU_GET_CLASS(cpu);
     GDBRegisterState *r;
 
-    if (reg < cc->gdb_num_core_regs) {
+    if (reg < cpu->cc->gdb_num_core_regs) {
-        return cc->gdb_write_register(cpu, mem_buf, reg);
+        return cpu->cc->gdb_write_register(cpu, mem_buf, reg);
     }
 
     for (guint i = 0; i < cpu->gdb_regs->len; i++) {
@@ -570,7 +567,7 @@ static void gdb_register_feature(CPUState *cpu, int base_reg,
 
 void gdb_init_cpu(CPUState *cpu)
 {
-    CPUClass *cc = CPU_GET_CLASS(cpu);
+    CPUClass *cc = cpu->cc;
     const GDBFeature *feature;
 
     cpu->gdb_regs = g_array_new(false, false, sizeof(GDBRegisterState));
@@ -1646,11 +1643,8 @@ void gdb_extend_qsupported_features(char *qflags)
 
 static void handle_query_supported(GArray *params, void *user_ctx)
 {
-    CPUClass *cc;
-
     g_string_printf(gdbserver_state.str_buf, "PacketSize=%x", MAX_PACKET_LENGTH);
-    cc = CPU_GET_CLASS(first_cpu);
+    if (first_cpu->cc->gdb_core_xml_file) {
-    if (cc->gdb_core_xml_file) {
         g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
     }
 
@@ -1697,7 +1691,6 @@ static void handle_query_supported(GArray *params, void *user_ctx)
 static void handle_query_xfer_features(GArray *params, void *user_ctx)
 {
     GDBProcess *process;
-    CPUClass *cc;
     unsigned long len, total_len, addr;
     const char *xml;
     const char *p;
@@ -1708,8 +1701,7 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
     }
 
     process = gdb_get_cpu_process(gdbserver_state.g_cpu);
-    cc = CPU_GET_CLASS(gdbserver_state.g_cpu);
+    if (!gdbserver_state.g_cpu->cc->gdb_core_xml_file) {
-    if (!cc->gdb_core_xml_file) {
         gdb_put_packet("");
         return;
     }

gdbstub/system.c

@@ -456,8 +456,6 @@ static int phy_memory_mode;
 int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
                                uint8_t *buf, int len, bool is_write)
 {
-    CPUClass *cc;
-
     if (phy_memory_mode) {
         if (is_write) {
             cpu_physical_memory_write(addr, buf, len);
@@ -467,9 +465,8 @@ int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
         return 0;
     }
 
-    cc = CPU_GET_CLASS(cpu);
+    if (cpu->cc->memory_rw_debug) {
-    if (cc->memory_rw_debug) {
+        return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);
-        return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
     }
 
     return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);

gdbstub/user-target.c

@@ -233,10 +233,8 @@ void gdb_handle_query_offsets(GArray *params, void *user_ctx)
 static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
                                          uint8_t *buf, int len, bool is_write)
 {
-    CPUClass *cc;
+    if (cpu->cc->memory_rw_debug) {
-    cc = CPU_GET_CLASS(cpu);
+        return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);
-    if (cc->memory_rw_debug) {
-        return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
     }
     return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
 }

gdbstub/user.c

@@ -743,11 +743,8 @@ int gdb_continue_partial(char *newstates)
 int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
                                uint8_t *buf, int len, bool is_write)
 {
-    CPUClass *cc;
+    if (cpu->cc->memory_rw_debug) {
-
+        return cpu->cc->memory_rw_debug(cpu, addr, buf, len, is_write);
-    cc = CPU_GET_CLASS(cpu);
-    if (cc->memory_rw_debug) {
-        return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
     }
     return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
 }