Merge remote-tracking branch 'remotes/stsquad/tags/pull-tcg-plugins-281019-4' into staging

TCG Plugins initial implementation

  - use --enable-plugins @ configure
  - low impact introspection (-plugin empty.so to measure overhead)
  - plugins cannot alter guest state
  - example plugins included in source tree (tests/plugins)
  - -d plugin to enable plugin output in logs
  - check-tcg runs extra tests when plugins enabled
  - documentation in docs/devel/plugins.rst

# gpg: Signature made Mon 28 Oct 2019 15:13:23 GMT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-tcg-plugins-281019-4: (57 commits)
  travis.yml: enable linux-gcc-debug-tcg cache
  MAINTAINERS: add me for the TCG plugins code
  scripts/checkpatch.pl: don't complain about (foo, /* empty */)
  .travis.yml: add --enable-plugins tests
  include/exec: wrap cpu_ldst.h in CONFIG_TCG
  accel/stubs: reduce headers from tcg-stub
  tests/plugin: add hotpages to analyse memory access patterns
  tests/plugin: add instruction execution breakdown
  tests/plugin: add a hotblocks plugin
  tests/tcg: enable plugin testing
  tests/tcg: drop test-i386-fprem from TESTS when not SLOW
  tests/tcg: move "virtual" tests to EXTRA_TESTS
  tests/tcg: set QEMU_OPTS for all cris runs
  tests/tcg/Makefile.target: fix path to config-host.mak
  tests/plugin: add sample plugins
  linux-user: support -plugin option
  vl: support -plugin option
  plugin: add qemu_plugin_outs helper
  plugin: add qemu_plugin_insn_disas helper
  plugin: expand the plugin_init function to include an info block
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/vl.c b/vl.c
index c389d24b2c..6a65a64bfd 100644
--- a/vl.c
+++ b/vl.c
@@ -110,6 +110,7 @@ int main(int argc, char **argv)
 
 #include "trace-root.h"
 #include "trace/control.h"
+#include "qemu/plugin.h"
 #include "qemu/queue.h"
 #include "sysemu/arch_init.h"
 
@@ -2859,6 +2860,7 @@ int main(int argc, char **argv, char **envp)
     bool list_data_dirs = false;
     char *dir, **dirs;
     BlockdevOptionsQueue bdo_queue = QSIMPLEQ_HEAD_INITIALIZER(bdo_queue);
+    QemuPluginList plugin_list = QTAILQ_HEAD_INITIALIZER(plugin_list);
 
     os_set_line_buffering();
 
@@ -2889,6 +2891,7 @@ int main(int argc, char **argv, char **envp)
     qemu_add_opts(&qemu_global_opts);
     qemu_add_opts(&qemu_mon_opts);
     qemu_add_opts(&qemu_trace_opts);
+    qemu_plugin_add_opts();
     qemu_add_opts(&qemu_option_rom_opts);
     qemu_add_opts(&qemu_machine_opts);
     qemu_add_opts(&qemu_accel_opts);
@@ -3684,6 +3687,9 @@ int main(int argc, char **argv, char **envp)
                 g_free(trace_file);
                 trace_file = trace_opt_parse(optarg);
                 break;
+            case QEMU_OPTION_plugin:
+                qemu_plugin_opt_parse(optarg, &plugin_list);
+                break;
             case QEMU_OPTION_readconfig:
                 {
                     int ret = qemu_read_config_file(optarg);
@@ -3997,6 +4003,11 @@ int main(int argc, char **argv, char **envp)
                                machine_class->default_machine_opts, 0);
     }
 
+    /* process plugin before CPUs are created, but once -smp has been parsed */
+    if (qemu_plugin_load_list(&plugin_list)) {
+        exit(1);
+    }
+
     qemu_opts_foreach(qemu_find_opts("device"),
                       default_driver_check, NULL, NULL);
     qemu_opts_foreach(qemu_find_opts("global"),