plugins: Use DisasContextBase for qemu_plugin_tb_vaddr

We do not need to separately record the start of the TB.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg/plugin-gen.c

@@ -188,7 +188,7 @@ static void plugin_gen_inject(struct qemu_plugin_tb *plugin_tb)
     int insn_idx = -1;
 
     if (unlikely(qemu_loglevel_mask(LOG_TB_OP_PLUGIN)
-                 && qemu_log_in_addr_range(plugin_tb->vaddr))) {
+                 && qemu_log_in_addr_range(tcg_ctx->plugin_db->pc_first))) {
         FILE *logfile = qemu_log_trylock();
         if (logfile) {
             fprintf(logfile, "OP before plugin injection:\n");
@@ -318,7 +318,6 @@ bool plugin_gen_tb_start(CPUState *cpu, const DisasContextBase *db)
 
         ret = true;
 
-        ptb->vaddr = db->pc_first;
         ptb->mem_helper = false;
 
         tcg_gen_plugin_cb(PLUGIN_GEN_FROM_TB);

include/qemu/plugin.h

@@ -118,7 +118,6 @@ struct qemu_plugin_scoreboard {
 struct qemu_plugin_tb {
     GPtrArray *insns;
     size_t n;
-    uint64_t vaddr;
 
     /* if set, the TB calls helpers that might access guest memory */
     bool mem_helper;

plugins/api.c

@@ -200,7 +200,8 @@ size_t qemu_plugin_tb_n_insns(const struct qemu_plugin_tb *tb)
 
 uint64_t qemu_plugin_tb_vaddr(const struct qemu_plugin_tb *tb)
 {
-    return tb->vaddr;
+    const DisasContextBase *db = tcg_ctx->plugin_db;
+    return db->pc_first;
 }
 
 struct qemu_plugin_insn *