Posted v4.
On 7/1/24 18:10, Pierrick Bouvier wrote:
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 function:
- qemu_plugin_mem_get_value
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.
v3
- simplify API: return an algebraic data type for value accessed
this can be easily extended when QEMU will support wider accesses
- fix Makefile test (use quiet-command instead of manually run the command)
- rename upper/lower to high/low
- reorder functions parameters and code to low/high instead of high/low, to
follow current convention in QEMU codebase
v2
- fix compilation on aarch64 (missing undef in accel/tcg/atomic_template.h)
v3
- add info when printing memory accesses (insn_vaddr,mem_vaddr,mem_hwaddr)
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 | 66 +++++++++++++--
include/qemu/plugin.h | 8 ++
include/qemu/qemu-plugin.h | 32 ++++++++
accel/tcg/plugin-gen.c | 3 +-
plugins/api.c | 34 ++++++++
plugins/core.c | 7 ++
tcg/tcg-op-ldst.c | 72 +++++++++++++++--
tests/plugin/mem.c | 69 +++++++++++++++-
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 | 1 +
tests/tcg/Makefile.target | 10 ++-
tests/tcg/x86_64/Makefile.target | 7 ++
tests/tcg/x86_64/check-plugin-mem-access.sh | 48 +++++++++++
15 files changed, 462 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
