diff options
Diffstat (limited to 'results/classifier/zero-shot/108/files/2238')
| -rw-r--r-- | results/classifier/zero-shot/108/files/2238 | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/results/classifier/zero-shot/108/files/2238 b/results/classifier/zero-shot/108/files/2238 new file mode 100644 index 00000000..05ff6c82 --- /dev/null +++ b/results/classifier/zero-shot/108/files/2238 @@ -0,0 +1,62 @@ +files: 0.921 +graphic: 0.878 +PID: 0.838 +performance: 0.832 +device: 0.770 +semantic: 0.766 +network: 0.766 +socket: 0.747 +other: 0.697 +vnc: 0.692 +permissions: 0.675 +debug: 0.672 +KVM: 0.627 +boot: 0.620 + +The `rw` parameter of `qemu_plugin_register_vcpu_mem_cb()` is not properly honored +Description of problem: +The `rw` parameter of `qemu_plugin_register_vcpu_mem_cb()` is not properly honored. +Steps to reproduce: +1. Register a callback with `qemu_plugin_register_vcpu_mem_cb()` +2. In the callback, print the return of `qemu_plugin_mem_is_store()` (either `true` or `false`) +3. Change the value of `rw` parameter of `qemu_plugin_register_vcpu_mem_cb()` and look whether the callback prints `true` and/or `false` to determine if this is inline with `rw`. + +In the callback, we don't we get what we asked for. + +| Requested with rw | Observed in the callback | +|---------------------|----------------------------| +| QEMU_PLUGIN_MEM_R | Only writes | +| QEMU_PLUGIN_MEM_W | Both reads and writes | +| QEMU_PLUGIN_MEM_RW | Both reads and writes | +Additional information: +In `plugin-gen.c`, line 497, there is the following function: + +```cpp +static bool op_rw(const TCGOp *op, const struct qemu_plugin_dyn_cb *cb) +{ + int w; + + w = op->args[2]; + return !!(cb->rw & (w + 1)); +} +``` + +The issue described above seems to be caused by the `+ 1`. I removed it and got the expected results. + +This function is used in the same file, line 526, like this: + +```cpp + if (!ok(begin_op, cb)) { + continue; + } +``` + +This isn't consistent with `core.c`, line 509, where the same flag is checked like this: + +```cpp + if (!(rw & cb->rw)) { + break; + } +``` + +Inconsistent because of the `+1` and also because of `break`/`continue`. |