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[PATCH v4 7/7] tests/tcg/x86_64: add test for plugin memory access

Pierrick Bouvier posted 7 patches 10 months, 1 week ago
There is a newer version of this series
[PATCH v4 7/7] tests/tcg/x86_64: add test for plugin memory access
Posted by Pierrick Bouvier 10 months, 1 week ago 
Add an explicit test to check expected memory values are read/written.
For sizes 8, 16, 32, 64 and 128, we generate a load/store operation.
For size 8 -> 64, we generate an atomic __sync_val_compare_and_swap too.
For 128bits memory access, we rely on SSE2 instructions.

By default, atomic accesses are non atomic if a single cpu is running,
so we force creation of a second one by creating a new thread first.

load/store helpers code path can't be triggered easily in user mode (no
softmmu), so we can't test it here.

Can be run with:
make -C build/tests/tcg/x86_64-linux-user run-plugin-test-plugin-mem-access-with-libmem.so

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
 tests/tcg/x86_64/test-plugin-mem-access.c   | 89 +++++++++++++++++++++
 tests/tcg/x86_64/Makefile.target            |  7 ++
 tests/tcg/x86_64/check-plugin-mem-access.sh | 48 +++++++++++
 3 files changed, 144 insertions(+)
 create mode 100644 tests/tcg/x86_64/test-plugin-mem-access.c
 create mode 100755 tests/tcg/x86_64/check-plugin-mem-access.sh

diff --git a/tests/tcg/x86_64/test-plugin-mem-access.c b/tests/tcg/x86_64/test-plugin-mem-access.c
new file mode 100644
index 00000000000..7fdd6a55829
--- /dev/null
+++ b/tests/tcg/x86_64/test-plugin-mem-access.c
@@ -0,0 +1,89 @@
+#include <emmintrin.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+static void *data;
+
+#define DEFINE_STORE(name, type, value) \
+static void store_##name(void)          \
+{                                       \
+    *((type *)data) = value;            \
+}
+
+#define DEFINE_ATOMIC_OP(name, type, value)                 \
+static void atomic_op_##name(void)                          \
+{                                                           \
+    *((type *)data) = 0x42;                                 \
+    __sync_val_compare_and_swap((type *)data, 0x42, value); \
+}
+
+#define DEFINE_LOAD(name, type)                         \
+static void load_##name(void)                           \
+{                                                       \
+    register type var asm("eax") = *((type *) data);    \
+    (void)var;                                          \
+}
+
+DEFINE_STORE(u8, uint8_t, 0xf1)
+DEFINE_ATOMIC_OP(u8, uint8_t, 0xf1)
+DEFINE_LOAD(u8, uint8_t)
+DEFINE_STORE(u16, uint16_t, 0xf123)
+DEFINE_ATOMIC_OP(u16, uint16_t, 0xf123)
+DEFINE_LOAD(u16, uint16_t)
+DEFINE_STORE(u32, uint32_t, 0xff112233)
+DEFINE_ATOMIC_OP(u32, uint32_t, 0xff112233)
+DEFINE_LOAD(u32, uint32_t)
+DEFINE_STORE(u64, uint64_t, 0xf123456789abcdef)
+DEFINE_ATOMIC_OP(u64, uint64_t, 0xf123456789abcdef)
+DEFINE_LOAD(u64, uint64_t)
+
+static void store_u128(void)
+{
+    _mm_store_si128(data, _mm_set_epi32(0xf1223344, 0x55667788,
+                                        0xf1234567, 0x89abcdef));
+}
+
+static void load_u128(void)
+{
+    __m128i var = _mm_load_si128(data);
+    (void)var;
+}
+
+static void *f(void *p)
+{
+    return NULL;
+}
+
+int main(void)
+{
+    /*
+     * We force creation of a second thread to enable cpu flag CF_PARALLEL.
+     * This will generate atomic operations when needed.
+     */
+    pthread_t thread;
+    pthread_create(&thread, NULL, &f, NULL);
+    pthread_join(thread, NULL);
+
+    data = malloc(sizeof(__m128i));
+    atomic_op_u8();
+    store_u8();
+    load_u8();
+
+    atomic_op_u16();
+    store_u16();
+    load_u16();
+
+    atomic_op_u32();
+    store_u32();
+    load_u32();
+
+    atomic_op_u64();
+    store_u64();
+    load_u64();
+
+    store_u128();
+    load_u128();
+
+    free(data);
+}
diff --git a/tests/tcg/x86_64/Makefile.target b/tests/tcg/x86_64/Makefile.target
index 5fedf221174..5f7015fd8b4 100644
--- a/tests/tcg/x86_64/Makefile.target
+++ b/tests/tcg/x86_64/Makefile.target
@@ -14,6 +14,7 @@ X86_64_TESTS += noexec
 X86_64_TESTS += cmpxchg
 X86_64_TESTS += adox
 X86_64_TESTS += test-1648
+PLUGINS_TESTS += test-plugin-mem-access
 TESTS=$(MULTIARCH_TESTS) $(X86_64_TESTS) test-x86_64
 else
 TESTS=$(MULTIARCH_TESTS)
@@ -24,6 +25,12 @@ adox: CFLAGS=-O2
 run-test-i386-ssse3: QEMU_OPTS += -cpu max
 run-plugin-test-i386-ssse3-%: QEMU_OPTS += -cpu max
 
+run-plugin-test-plugin-mem-access-with-libmem.so: \
+	PLUGIN_ARGS=$(COMMA)print-accesses=true
+run-plugin-test-plugin-mem-access-with-libmem.so: \
+	CHECK_PLUGIN_OUTPUT_COMMAND= \
+	$(SRC_PATH)/tests/tcg/x86_64/check-plugin-mem-access.sh
+
 test-x86_64: LDFLAGS+=-lm -lc
 test-x86_64: test-i386.c test-i386.h test-i386-shift.h test-i386-muldiv.h
 	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
diff --git a/tests/tcg/x86_64/check-plugin-mem-access.sh b/tests/tcg/x86_64/check-plugin-mem-access.sh
new file mode 100755
index 00000000000..92008e25a93
--- /dev/null
+++ b/tests/tcg/x86_64/check-plugin-mem-access.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+die()
+{
+    echo "$@" 1>&2
+    exit 1
+}
+
+check()
+{
+    file=$1
+    pattern=$2
+    grep "$pattern" "$file" > /dev/null || die "\"$pattern\" not found in $file"
+}
+
+[ $# -eq 1 ] || die "usage: plugin_out_file"
+
+plugin_out=$1
+
+expected()
+{
+    cat << EOF
+,store_u8,.*,8,store,0xf1
+,atomic_op_u8,.*,8,load,0x42
+,atomic_op_u8,.*,8,store,0xf1
+,load_u8,.*,8,load,0xf1
+,store_u16,.*,16,store,0xf123
+,atomic_op_u16,.*,16,load,0x42
+,atomic_op_u16,.*,16,store,0xf123
+,load_u16,.*,16,load,0xf123
+,store_u32,.*,32,store,0xff112233
+,atomic_op_u32,.*,32,load,0x42
+,atomic_op_u32,.*,32,store,0xff112233
+,load_u32,.*,32,load,0xff112233
+,store_u64,.*,64,store,0xf123456789abcdef
+,atomic_op_u64,.*,64,load,0x42
+,atomic_op_u64,.*,64,store,0xf123456789abcdef
+,load_u64,.*,64,load,0xf123456789abcdef
+,store_u128,.*,128,store,0xf122334455667788f123456789abcdef
+,load_u128,.*,128,load,0xf122334455667788f123456789abcdef
+EOF
+}
+
+expected | while read line; do
+    check "$plugin_out" "$line"
+done
-- 
2.39.2
RE: [PATCH v4 7/7] tests/tcg/x86_64: add test for plugin memory access
Posted by Xingtao Yao (Fujitsu) via 10 months, 1 week ago 

> -----Original Message-----
> From: qemu-devel-bounces+yaoxt.fnst=fujitsu.com@nongnu.org
> <qemu-devel-bounces+yaoxt.fnst=fujitsu.com@nongnu.org> On Behalf Of
> Pierrick Bouvier
> Sent: Wednesday, July 3, 2024 2:45 AM
> To: qemu-devel@nongnu.org
> Cc: Alex Bennée <alex.bennee@linaro.org>; Mahmoud Mandour
> <ma.mandourr@gmail.com>; Pierrick Bouvier <pierrick.bouvier@linaro.org>;
> Alexandre Iooss <erdnaxe@crans.org>; Philippe Mathieu-Daudé
> <philmd@linaro.org>; Paolo Bonzini <pbonzini@redhat.com>; Richard Henderson
> <richard.henderson@linaro.org>; Eduardo Habkost <eduardo@habkost.net>
> Subject: [PATCH v4 7/7] tests/tcg/x86_64: add test for plugin memory access
> 
> Add an explicit test to check expected memory values are read/written.
> For sizes 8, 16, 32, 64 and 128, we generate a load/store operation.
> For size 8 -> 64, we generate an atomic __sync_val_compare_and_swap too.
> For 128bits memory access, we rely on SSE2 instructions.
> 
> By default, atomic accesses are non atomic if a single cpu is running,
> so we force creation of a second one by creating a new thread first.
> 
> load/store helpers code path can't be triggered easily in user mode (no
> softmmu), so we can't test it here.
> 
> Can be run with:
> make -C build/tests/tcg/x86_64-linux-user
> run-plugin-test-plugin-mem-access-with-libmem.so
> 
> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> ---
>  tests/tcg/x86_64/test-plugin-mem-access.c   | 89
> +++++++++++++++++++++
>  tests/tcg/x86_64/Makefile.target            |  7 ++
>  tests/tcg/x86_64/check-plugin-mem-access.sh | 48 +++++++++++
>  3 files changed, 144 insertions(+)
>  create mode 100644 tests/tcg/x86_64/test-plugin-mem-access.c
>  create mode 100755 tests/tcg/x86_64/check-plugin-mem-access.sh
> 
> diff --git a/tests/tcg/x86_64/test-plugin-mem-access.c
> b/tests/tcg/x86_64/test-plugin-mem-access.c
> new file mode 100644
> index 00000000000..7fdd6a55829
> --- /dev/null
> +++ b/tests/tcg/x86_64/test-plugin-mem-access.c
> @@ -0,0 +1,89 @@
> +#include <emmintrin.h>
> +#include <pthread.h>
> +#include <stdint.h>
> +#include <stdlib.h>
> +
> +static void *data;
> +
> +#define DEFINE_STORE(name, type, value) \
> +static void store_##name(void)          \
> +{                                       \
> +    *((type *)data) = value;            \
> +}
> +
> +#define DEFINE_ATOMIC_OP(name, type, value)                 \
> +static void atomic_op_##name(void)                          \
> +{                                                           \
> +    *((type *)data) = 0x42;                                 \
> +    __sync_val_compare_and_swap((type *)data, 0x42, value); \
> +}
> +
> +#define DEFINE_LOAD(name, type)                         \
> +static void load_##name(void)                           \
> +{                                                       \
> +    register type var asm("eax") = *((type *) data);    \
> +    (void)var;                                          \
> +}
> +
> +DEFINE_STORE(u8, uint8_t, 0xf1)
> +DEFINE_ATOMIC_OP(u8, uint8_t, 0xf1)
> +DEFINE_LOAD(u8, uint8_t)
> +DEFINE_STORE(u16, uint16_t, 0xf123)
> +DEFINE_ATOMIC_OP(u16, uint16_t, 0xf123)
> +DEFINE_LOAD(u16, uint16_t)
> +DEFINE_STORE(u32, uint32_t, 0xff112233)
> +DEFINE_ATOMIC_OP(u32, uint32_t, 0xff112233)
> +DEFINE_LOAD(u32, uint32_t)
> +DEFINE_STORE(u64, uint64_t, 0xf123456789abcdef)
> +DEFINE_ATOMIC_OP(u64, uint64_t, 0xf123456789abcdef)
> +DEFINE_LOAD(u64, uint64_t)
> +
> +static void store_u128(void)
> +{
> +    _mm_store_si128(data, _mm_set_epi32(0xf1223344, 0x55667788,
> +                                        0xf1234567, 0x89abcdef));
> +}
> +
> +static void load_u128(void)
> +{
> +    __m128i var = _mm_load_si128(data);
> +    (void)var;
> +}
> +
> +static void *f(void *p)
> +{
> +    return NULL;
> +}
> +
> +int main(void)
> +{
> +    /*
> +     * We force creation of a second thread to enable cpu flag CF_PARALLEL.
> +     * This will generate atomic operations when needed.
> +     */
> +    pthread_t thread;
> +    pthread_create(&thread, NULL, &f, NULL);
> +    pthread_join(thread, NULL);
> +
> +    data = malloc(sizeof(__m128i));
> +    atomic_op_u8();
> +    store_u8();
> +    load_u8();
> +
> +    atomic_op_u16();
> +    store_u16();
> +    load_u16();
> +
> +    atomic_op_u32();
> +    store_u32();
> +    load_u32();
> +
> +    atomic_op_u64();
> +    store_u64();
> +    load_u64();
> +
> +    store_u128();
> +    load_u128();
> +
> +    free(data);
> +}
> diff --git a/tests/tcg/x86_64/Makefile.target b/tests/tcg/x86_64/Makefile.target
> index 5fedf221174..5f7015fd8b4 100644
> --- a/tests/tcg/x86_64/Makefile.target
> +++ b/tests/tcg/x86_64/Makefile.target
> @@ -14,6 +14,7 @@ X86_64_TESTS += noexec
>  X86_64_TESTS += cmpxchg
>  X86_64_TESTS += adox
>  X86_64_TESTS += test-1648
> +PLUGINS_TESTS += test-plugin-mem-access
>  TESTS=$(MULTIARCH_TESTS) $(X86_64_TESTS) test-x86_64
>  else
>  TESTS=$(MULTIARCH_TESTS)
> @@ -24,6 +25,12 @@ adox: CFLAGS=-O2
>  run-test-i386-ssse3: QEMU_OPTS += -cpu max
>  run-plugin-test-i386-ssse3-%: QEMU_OPTS += -cpu max
> 
> +run-plugin-test-plugin-mem-access-with-libmem.so: \
> +	PLUGIN_ARGS=$(COMMA)print-accesses=true
> +run-plugin-test-plugin-mem-access-with-libmem.so: \
> +	CHECK_PLUGIN_OUTPUT_COMMAND= \
> +	$(SRC_PATH)/tests/tcg/x86_64/check-plugin-mem-access.sh
> +
>  test-x86_64: LDFLAGS+=-lm -lc
>  test-x86_64: test-i386.c test-i386.h test-i386-shift.h test-i386-muldiv.h
>  	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
> diff --git a/tests/tcg/x86_64/check-plugin-mem-access.sh
> b/tests/tcg/x86_64/check-plugin-mem-access.sh
> new file mode 100755
> index 00000000000..92008e25a93
> --- /dev/null
> +++ b/tests/tcg/x86_64/check-plugin-mem-access.sh
> @@ -0,0 +1,48 @@
> +#!/usr/bin/env bash
> +
> +set -euo pipefail
> +
> +die()
> +{
> +    echo "$@" 1>&2
> +    exit 1
> +}
> +
> +check()
> +{
> +    file=$1
> +    pattern=$2
> +    grep "$pattern" "$file" > /dev/null || die "\"$pattern\" not found in $file"
> +}
> +
> +[ $# -eq 1 ] || die "usage: plugin_out_file"
> +
> +plugin_out=$1
> +
> +expected()
> +{
> +    cat << EOF
> +,store_u8,.*,8,store,0xf1
> +,atomic_op_u8,.*,8,load,0x42
> +,atomic_op_u8,.*,8,store,0xf1
> +,load_u8,.*,8,load,0xf1
> +,store_u16,.*,16,store,0xf123
> +,atomic_op_u16,.*,16,load,0x42
> +,atomic_op_u16,.*,16,store,0xf123
> +,load_u16,.*,16,load,0xf123
> +,store_u32,.*,32,store,0xff112233
> +,atomic_op_u32,.*,32,load,0x42
> +,atomic_op_u32,.*,32,store,0xff112233
> +,load_u32,.*,32,load,0xff112233
> +,store_u64,.*,64,store,0xf123456789abcdef
> +,atomic_op_u64,.*,64,load,0x42
> +,atomic_op_u64,.*,64,store,0xf123456789abcdef
> +,load_u64,.*,64,load,0xf123456789abcdef
> +,store_u128,.*,128,store,0xf122334455667788f123456789abcdef
> +,load_u128,.*,128,load,0xf122334455667788f123456789abcdef
> +EOF
> +}
> +
> +expected | while read line; do
> +    check "$plugin_out" "$line"
> +done
> --
> 2.39.2
> 

Tested-by: Xingtao Yao <yaoxt.fnst@fujitsu.com>

Patchew 2.1-devel-8c64711

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