[Qemu-devel] [PATCH 2/5] trace: [all] Add "guest_vmem" event

["Lluís Vilanova" <vilanova@ac.upc.edu>]

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
 include/exec/cpu_ldst_template.h          |   17 +++++++++++++++
 include/exec/cpu_ldst_useronly_template.h |   14 ++++++++++++
 tcg/tcg-op.c                              |   34 ++++++++++++++++++++++++++---
 trace-events                              |   13 +++++++++++
 4 files changed, 74 insertions(+), 4 deletions(-)

diff --git a/include/exec/cpu_ldst_template.h b/include/exec/cpu_ldst_template.h
index 3091c00..516f378 100644
--- a/include/exec/cpu_ldst_template.h
+++ b/include/exec/cpu_ldst_template.h
@@ -23,6 +23,11 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
+
+#if !defined(SOFTMMU_CODE_ACCESS)
+#include "trace.h"
+#endif
+
 #if DATA_SIZE == 8
 #define SUFFIX q
 #define USUFFIX q
@@ -80,6 +85,10 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
     int mmu_idx;
     TCGMemOpIdx oi;
 
+#if !defined(SOFTMMU_CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 0);
+#endif
+
     addr = ptr;
     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
@@ -112,6 +121,10 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
     int mmu_idx;
     TCGMemOpIdx oi;
 
+#if !defined(SOFTMMU_CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 0);
+#endif
+
     addr = ptr;
     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
@@ -148,6 +161,10 @@ glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
     int mmu_idx;
     TCGMemOpIdx oi;
 
+#if !defined(SOFTMMU_CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 1);
+#endif
+
     addr = ptr;
     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
diff --git a/include/exec/cpu_ldst_useronly_template.h b/include/exec/cpu_ldst_useronly_template.h
index 040b147..cde3d00 100644
--- a/include/exec/cpu_ldst_useronly_template.h
+++ b/include/exec/cpu_ldst_useronly_template.h
@@ -22,6 +22,11 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
+
+#if !defined(CODE_ACCESS)
+#include "trace.h"
+#endif
+
 #if DATA_SIZE == 8
 #define SUFFIX q
 #define USUFFIX q
@@ -53,6 +58,9 @@
 static inline RES_TYPE
 glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
 {
+#if !defined(CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 0);
+#endif
     return glue(glue(ld, USUFFIX), _p)(g2h(ptr));
 }
 
@@ -68,6 +76,9 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 static inline int
 glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
 {
+#if !defined(CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 0);
+#endif
     return glue(glue(lds, SUFFIX), _p)(g2h(ptr));
 }
 
@@ -85,6 +96,9 @@ static inline void
 glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
                                       RES_TYPE v)
 {
+#if !defined(CODE_ACCESS)
+    trace_guest_vmem_exec(ENV_GET_CPU(env), ptr, DATA_SIZE, 1);
+#endif
     glue(glue(st, SUFFIX), _p)(g2h(ptr), v);
 }
 
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index f554b86..789e427 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -25,6 +25,7 @@
 #include "qemu/osdep.h"
 #include "tcg.h"
 #include "tcg-op.h"
+#include "trace-tcg.h"
 
 /* Reduce the number of ifdefs below.  This assumes that all uses of
    TCGV_HIGH and TCGV_LOW are properly protected by a conditional that
@@ -1904,22 +1905,44 @@ static void gen_ldst_i64(TCGOpcode opc, TCGv_i64 val, TCGv addr,
 #endif
 }
 
-void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
+static inline uint8_t tcg_memop_size(TCGMemOp op)
+{
+    return 1 << (op & MO_SIZE);
+}
+
+static inline void do_tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
 {
     memop = tcg_canonicalize_memop(memop, 0, 0);
     gen_ldst_i32(INDEX_op_qemu_ld_i32, val, addr, memop, idx);
 }
 
-void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
+void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
+{
+    trace_guest_vmem_tcg(tcg_ctx.cpu, tcg_ctx.tcg_env,
+                         addr, tcg_memop_size(memop), 0);
+    do_tcg_gen_qemu_ld_i32(val, addr, idx, memop);
+}
+
+static inline void do_tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
 {
     memop = tcg_canonicalize_memop(memop, 0, 1);
     gen_ldst_i32(INDEX_op_qemu_st_i32, val, addr, memop, idx);
 }
 
+void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, TCGMemOp memop)
+{
+    trace_guest_vmem_tcg(tcg_ctx.cpu, tcg_ctx.tcg_env,
+                         addr, tcg_memop_size(memop), 1);
+    do_tcg_gen_qemu_st_i32(val, addr, idx, memop);
+}
+
 void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop)
 {
+    trace_guest_vmem_tcg(tcg_ctx.cpu, tcg_ctx.tcg_env,
+                         addr, tcg_memop_size(memop), 0);
+
     if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
-        tcg_gen_qemu_ld_i32(TCGV_LOW(val), addr, idx, memop);
+        do_tcg_gen_qemu_ld_i32(TCGV_LOW(val), addr, idx, memop);
         if (memop & MO_SIGN) {
             tcg_gen_sari_i32(TCGV_HIGH(val), TCGV_LOW(val), 31);
         } else {
@@ -1934,8 +1957,11 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop)
 
 void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop)
 {
+    trace_guest_vmem_tcg(tcg_ctx.cpu, tcg_ctx.tcg_env,
+                         addr, tcg_memop_size(memop), 0);
+
     if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
-        tcg_gen_qemu_st_i32(TCGV_LOW(val), addr, idx, memop);
+        do_tcg_gen_qemu_st_i32(TCGV_LOW(val), addr, idx, memop);
         return;
     }
 
diff --git a/trace-events b/trace-events
index f986c81..1088fe0 100644
--- a/trace-events
+++ b/trace-events
@@ -1890,3 +1890,16 @@ qio_channel_command_new_pid(void *ioc, int writefd, int readfd, int pid) "Comman
 qio_channel_command_new_spawn(void *ioc, const char *binary, int flags) "Command new spawn ioc=%p binary=%s flags=%d"
 qio_channel_command_abort(void *ioc, int pid) "Command abort ioc=%p pid=%d"
 qio_channel_command_wait(void *ioc, int pid, int ret, int status) "Command abort ioc=%p pid=%d ret=%d status=%d"
+
+### Guest events, keep at bottom
+
+# @vaddr: Access' virtual address.
+# @size : Access' size (bytes).
+# @store: Whether the access is a store.
+#
+# Start virtual memory access (before any potential access violation).
+#
+# Does not include memory accesses performed by devices.
+#
+# Targets: TCG(all)
+disable vcpu tcg guest_vmem(TCGv vaddr, uint8_t size, uint8_t store) "size=%d store=%d", "vaddr=0x%016"PRIx64" size=%d store=%d"