This series allows plugins to know which value is read/written during a memory
access.
For every memory access, we know copy this value before calling mem callbacks,
and those can query it using new API functions:
- qemu_plugin_mem_get_value_upper_bits
- qemu_plugin_mem_get_value_lower_bits
Mem plugin was extended to print accesses, and a new test was added to check
functionality work as expected. A bug was found where callbacks were not
called as expected.
This will open new use cases for plugins, such as following specific values in
memory.
Pierrick Bouvier (7):
plugins: fix mem callback array size
plugins: save value during memory accesses
plugins: extend API to get latest memory value accessed
tests/tcg: add mechanism to run specific tests with plugins
tests/tcg: allow to check output of plugins
tests/plugin/mem: add option to print memory accesses
tests/tcg/x86_64: add test for plugin memory access
accel/tcg/atomic_template.h | 64 +++++++++++++--
include/qemu/plugin.h | 8 ++
include/qemu/qemu-plugin.h | 20 +++++
accel/tcg/plugin-gen.c | 3 +-
plugins/api.c | 21 +++++
plugins/core.c | 7 ++
tcg/tcg-op-ldst.c | 72 +++++++++++++++--
tests/plugin/mem.c | 28 ++++++-
tests/tcg/x86_64/test-plugin-mem-access.c | 89 +++++++++++++++++++++
accel/tcg/atomic_common.c.inc | 13 ++-
accel/tcg/ldst_common.c.inc | 38 +++++----
plugins/qemu-plugins.symbols | 2 +
tests/tcg/Makefile.target | 8 +-
tests/tcg/x86_64/Makefile.target | 7 ++
tests/tcg/x86_64/check-plugin-mem-access.sh | 48 +++++++++++
15 files changed, 393 insertions(+), 35 deletions(-)
create mode 100644 tests/tcg/x86_64/test-plugin-mem-access.c
create mode 100755 tests/tcg/x86_64/check-plugin-mem-access.sh