Add Python 3.12 Support

Makefile

@@ -60,7 +60,6 @@ VMLINUX := vmlinux.h
 BPF_ROOT := bpf
 BPF_SRC := $(BPF_ROOT)/unwinders/native.bpf.c
 OUT_BPF_DIR := pkg/profiler/cpu/bpf/programs/objects/$(ARCH)
-# TODO(kakkoyun): DRY.
 OUT_BPF := $(OUT_BPF_DIR)/native.bpf.o
 OUT_RBPERF := $(OUT_BPF_DIR)/rbperf.bpf.o
 OUT_PYPERF := $(OUT_BPF_DIR)/pyperf.bpf.o
@@ -163,7 +162,6 @@ ifndef DOCKER
 $(OUT_BPF): $(BPF_SRC) libbpf | $(OUT_DIR)
 	mkdir -p $(OUT_BPF_DIR) $(OUT_BPF_CONTAINED_DIR)
 	$(MAKE) -C bpf build
-	# TODO(kakkoyun): DRY.
 	cp bpf/out/$(ARCH)/native.bpf.o $(OUT_BPF)
 	cp bpf/out/$(ARCH)/rbperf.bpf.o $(OUT_RBPERF)
 	cp bpf/out/$(ARCH)/pyperf.bpf.o $(OUT_PYPERF)

bpf/Makefile

@@ -14,7 +14,6 @@ OUT_DIR ?= ../dist
 OUT_BPF_BASE_DIR := out
 OUT_BPF_DIR := $(OUT_BPF_BASE_DIR)/$(ARCH)
 OUT_BPF := $(OUT_BPF_DIR)/native.bpf.o
-# TODO(kakkoyun): DRY.
 OUT_RBPERF := $(OUT_BPF_DIR)/rbperf.bpf.o
 OUT_PYPERF := $(OUT_BPF_DIR)/pyperf.bpf.o
 OUT_PID_NAMESPACE_DETECTOR := $(OUT_BPF_DIR)/pid_namespace.bpf.o
@@ -24,7 +23,6 @@ BPF_BUNDLE := $(OUT_DIR)/parca-agent.bpf.tar.gz
 LIBBPF_HEADERS := $(OUT_DIR)/libbpf/$(ARCH)/usr/include
 
 VMLINUX_INCLUDE_PATH := $(SHORT_ARCH)
-# TODO(kakkoyun): DRY.
 BPF_SRC := unwinders/native.bpf.c
 RBPERF_SRC := unwinders/rbperf.bpf.c
 PYPERF_SRC := unwinders/pyperf.bpf.c

bpf/unwinders/pyperf.bpf.c

@@ -48,6 +48,20 @@ struct {
   __type(value, PythonVersionOffsets);
 } version_specific_offsets SEC(".maps");
 
+struct {
+  __uint(type, BPF_MAP_TYPE_HASH);
+  __uint(max_entries, 12); // arbitrary
+  __type(key, u32);
+  __type(value, LibcOffsets);
+} musl_offsets SEC(".maps");
+
+struct {
+  __uint(type, BPF_MAP_TYPE_HASH);
+  __uint(max_entries, 12); // arbitrary
+  __type(key, u32);
+  __type(value, LibcOffsets);
+} glibc_offsets SEC(".maps");
+
 struct {
   __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
   __uint(max_entries, 1);
@@ -80,7 +94,64 @@ struct {
     }                                                                                                                                                          \
   })
 
-static __always_inline long unsigned int read_tls_base(struct task_struct *task) {
+// tls_read reads from the TLS associated with the provided key depending on the libc implementation.
+static inline __attribute__((__always_inline__)) int tls_read(void *tls_base, InterpreterInfo *interpreter_info, void **out) {
+  LibcOffsets *libc_offsets;
+  void *tls_addr = NULL;
+  int key = interpreter_info->tls_key;
+  switch (interpreter_info->libc_implementation) {
+  case LIBC_IMPLEMENTATION_GLIBC:
+    // Read the offset from the corresponding map.
+    libc_offsets = bpf_map_lookup_elem(&glibc_offsets, &interpreter_info->libc_offset_index);
+    if (libc_offsets == NULL) {
+      LOG("[error] libc_offsets for glibc is NULL");
+      return -1;
+    }
+#if __TARGET_ARCH_x86
+
+    tls_addr = tls_base + libc_offsets->pthread_block + (key * libc_offsets->pthread_key_data_size) + libc_offsets->pthread_key_data;
+#elif __TARGET_ARCH_arm64
+    tls_addr =
+        tls_base - libc_offsets->pthread_size + libc_offsets->pthread_block + (key * libc_offsets->pthread_key_data_size) + libc_offsets->pthread_key_data;
+#else
+#error "Unsupported platform"
+#endif
+    break;
+  case LIBC_IMPLEMENTATION_MUSL:
+    // Read the offset from the corresponding map.
+    libc_offsets = bpf_map_lookup_elem(&musl_offsets, &interpreter_info->libc_offset_index);
+    if (libc_offsets == NULL) {
+      LOG("[error] libc_offsets for musl is NULL");
+      return -1;
+    }
+#if __TARGET_ARCH_x86
+    if (bpf_probe_read_user(&tls_addr, sizeof(tls_addr), tls_base + libc_offsets->pthread_block)) {
+      return -1;
+    }
+    tls_addr = tls_addr + key * libc_offsets->pthread_key_data_size;
+#elif __TARGET_ARCH_arm64
+    if (bpf_probe_read_user(&tls_addr, sizeof(tls_addr), tls_base - libc_offsets->pthread_size + libc_offsets->pthread_block)) {
+      return -1;
+    }
+    tls_addr = key * libc_offsets->pthread_key_data_size;
+#else
+#error "Unsupported platform"
+#endif
+    break;
+  default:
+    LOG("[error] unknown libc_implementation %d", interpreter_info->libc_implementation);
+    return -1;
+  }
+
+  LOG("tls_read key %d from address 0x%lx", key, (unsigned long)tls_addr);
+  if (bpf_probe_read(out, sizeof(*out), tls_addr)) {
+    LOG("failed to read 0x%lx from TLS", (unsigned long)tls_addr);
+    return -1;
+  }
+  return 0;
+}
+
+static inline __attribute__((__always_inline__)) long unsigned int read_tls_base(struct task_struct *task) {
   long unsigned int tls_base;
 // This changes depending on arch and kernel version.
 // task->thread.fs, task->thread.uw.tp_value, etc.
@@ -108,7 +179,6 @@ int unwind_python_stack(struct bpf_perf_event_data *ctx) {
     return 1;
   }
 
-  // TODO(kakkoyun) : DRY.
   u64 pid_tgid = bpf_get_current_pid_tgid();
   pid_t pid = pid_tgid >> 32;
   pid_t tid = pid_tgid;
@@ -122,11 +192,6 @@ int unwind_python_stack(struct bpf_perf_event_data *ctx) {
     return 0;
   }
 
-  if (interpreter_info->thread_state_addr == 0) {
-    LOG("[error] interpreter_info.thread_state_addr was NULL");
-    return 0;
-  }
-
   LOG("[start]");
   LOG("[event] pid=%d tid=%d", pid, tid);
 
@@ -157,50 +222,68 @@ int unwind_python_stack(struct bpf_perf_event_data *ctx) {
 
   // Fetch thread state.
 
-  // GDB: ((PyThreadState *)_PyRuntime.gilstate.tstate_current)
-  LOG("interpreter_info->thread_state_addr 0x%llx", interpreter_info->thread_state_addr);
-  int err = bpf_probe_read_user(&state->thread_state, sizeof(state->thread_state), (void *)(long)interpreter_info->thread_state_addr);
-  if (err != 0) {
-    LOG("[error] failed to read interpreter_info->thread_state_addr with %d", err);
-    goto submit_without_unwinding;
-  }
-  if (state->thread_state == 0) {
-    LOG("[error] thread_state was NULL");
-    goto submit_without_unwinding;
+  if (interpreter_info->thread_state_addr != 0) {
+    LOG("interpreter_info->thread_state_addr 0x%llx", interpreter_info->thread_state_addr);
+    int err = bpf_probe_read_user(&state->thread_state, sizeof(state->thread_state), (void *)(long)interpreter_info->thread_state_addr);
+    if (err != 0) {
+      LOG("[error] failed to read interpreter_info->thread_state_addr with %d", err);
+      goto submit_without_unwinding;
+    }
+    LOG("thread_state 0x%llx", state->thread_state);
   }
-  LOG("thread_state 0x%llx", state->thread_state);
 
-  struct task_struct *task = (struct task_struct *)bpf_get_current_task();
-  long unsigned int tls_base = read_tls_base(task);
-  LOG("tls_base 0x%llx", (void *)tls_base);
+  if (interpreter_info->use_tls) {
+    struct task_struct *task = (struct task_struct *)bpf_get_current_task();
+    long unsigned int tls_base = read_tls_base(task);
+    LOG("tls_base 0x%llx", (void *)tls_base);
+
+    // TODO(kakkoyun): Read TLS key in here instead of user-space.
+    // int key;
+    // if (bpf_probe_read(&key, sizeof(key), interpreter_info->tls_key_addr)) {
+    //   LOG("[error] failed to read TLS key from 0x%lx", (unsigned long)interpreter_info->tls_key_addr);
+    //   goto submit_without_unwinding;
+    // }
+    if (tls_read((void *)tls_base, interpreter_info, &state->thread_state)) {
+      LOG("[error] failed to read thread state from TLS 0x%lx", (unsigned long)interpreter_info->tls_key);
+      goto submit_without_unwinding;
+    }
+
+    if (state->thread_state == 0) {
+      LOG("[error] thread_state was NULL");
+      goto submit_without_unwinding;
+    }
+    LOG("thread_state 0x%llx", state->thread_state);
+  }
 
   GET_OFFSETS();
 
   // Fetch the thread id.
+
   LOG("offsets->py_thread_state.thread_id %d", offsets->py_thread_state.thread_id);
   pthread_t pthread_id;
-  bpf_probe_read_user(&pthread_id, sizeof(pthread_id), state->thread_state + offsets->py_thread_state.thread_id);
+  if (bpf_probe_read_user(&pthread_id, sizeof(pthread_id), state->thread_state + offsets->py_thread_state.thread_id)) {
+    LOG("[error] failed to read thread_state->thread_id");
+    goto submit_without_unwinding;
+  }
+
   LOG("pthread_id %lu", pthread_id);
-  // 0x10 = offsetof(tcbhead_t, self) for glibc x86.
-  // pthread_t current_pthread_id;
-  // bpf_probe_read_user(&current_pthread_id, sizeof(current_pthread_id), (void *)(tls_base + 0x10));
-  // LOG("current_pthread_id %lu", current_pthread_id);
-  // if (pthread_id != current_pthread_id) {
-  //   LOG("[error] pthread_id %lu != current_pthread_id %lu", pthread_id, current_pthread_id);
-  //   goto submit_without_unwinding;
-  // }
-  // state->current_pthread = current_pthread_id;
   state->current_pthread = pthread_id;
 
   // Get pointer to top frame from PyThreadState.
 
   if (offsets->py_thread_state.frame > -1) {
     LOG("offsets->py_thread_state.frame %d", offsets->py_thread_state.frame);
-    bpf_probe_read_user(&state->frame_ptr, sizeof(void *), state->thread_state + offsets->py_thread_state.frame);
+    if (bpf_probe_read_user(&state->frame_ptr, sizeof(void *), state->thread_state + offsets->py_thread_state.frame)) {
+      LOG("[error] failed to read thread_state->frame");
+      goto submit_without_unwinding;
+    }
   } else {
     LOG("offsets->py_thread_state.cframe %d", offsets->py_thread_state.cframe);
     void *cframe;
-    bpf_probe_read_user(&cframe, sizeof(cframe), (void *)(state->thread_state + offsets->py_thread_state.cframe));
+    if (bpf_probe_read_user(&cframe, sizeof(cframe), (void *)(state->thread_state + offsets->py_thread_state.cframe))) {
+      LOG("[error] failed to read thread_state->cframe");
+      goto submit_without_unwinding;
+    }
     if (cframe == 0) {
       LOG("[error] cframe was NULL");
       goto submit_without_unwinding;

bpf/unwinders/pyperf.h

@@ -12,11 +12,22 @@
 
 #define PYPERF_STACK_WALKING_PROGRAM_IDX 0
 
+enum libc_implementation {
+  LIBC_IMPLEMENTATION_GLIBC = 0,
+  LIBC_IMPLEMENTATION_MUSL = 1,
+};
+
 typedef struct {
   // u64 start_time;
   // u64 interpreter_addr;
   u64 thread_state_addr;
+  u64 tls_key;
   u32 py_version_offset_index;
+  u32 libc_offset_index;
+  enum libc_implementation libc_implementation;
+
+  _Bool use_tls;
+  // TODO(kakkoyun): bool use_runtime_debug_offsets;
 } InterpreterInfo;
 
 enum python_stack_status {
@@ -127,3 +138,10 @@ typedef struct {
   PyTupleObject py_tuple_object;
   PyTypeObject py_type_object;
 } PythonVersionOffsets;
+
+typedef struct {
+  s64 pthread_size;
+  s64 pthread_block;
+  s64 pthread_key_data;
+  s64 pthread_key_data_size;
+} LibcOffsets;

go.mod

@@ -24,12 +24,12 @@ require (
 	github.com/google/pprof v0.0.0-20240207164012-fb44976bdcd5
 	github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.0
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.1
-	github.com/klauspost/compress v1.17.6
+	github.com/klauspost/compress v1.17.7
 	github.com/minio/highwayhash v1.0.2
 	github.com/oklog/run v1.1.0
 	github.com/opencontainers/runtime-spec v1.2.0
 	github.com/parca-dev/parca v0.20.0
-	github.com/parca-dev/runtime-data v0.0.0-20240221144835-838a856ad496
+	github.com/parca-dev/runtime-data v0.0.0-20240225202746-241008d5f5c3
 	github.com/planetscale/vtprotobuf v0.6.0
 	github.com/prometheus/client_golang v1.18.0
 	github.com/prometheus/common v0.47.0
@@ -201,11 +201,11 @@ require (
 	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.23.1 // indirect
 	go.opentelemetry.io/proto/otlp v1.1.0 // indirect
-	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/crypto v0.19.0 // indirect
 	golang.org/x/mod v0.14.0 // indirect
-	golang.org/x/net v0.20.0 // indirect
+	golang.org/x/net v0.21.0 // indirect
 	golang.org/x/oauth2 v0.16.0 // indirect
-	golang.org/x/term v0.16.0 // indirect
+	golang.org/x/term v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
 	golang.org/x/tools v0.17.0 // indirect

go.sum

@@ -386,8 +386,8 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/klauspost/compress v1.17.6 h1:60eq2E/jlfwQXtvZEeBUYADs+BwKBWURIY+Gj2eRGjI=
-github.com/klauspost/compress v1.17.6/go.mod h1:/dCuZOvVtNoHsyb+cuJD3itjs3NbnF6KH9zAO4BDxPM=
+github.com/klauspost/compress v1.17.7 h1:ehO88t2UGzQK66LMdE8tibEd1ErmzZjNEqWkjLAKQQg=
+github.com/klauspost/compress v1.17.7/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/klauspost/cpuid/v2 v2.0.1/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
 github.com/klauspost/cpuid/v2 v2.2.6 h1:ndNyv040zDGIDh8thGkXYjnFtiN02M1PVVF+JE/48xc=
 github.com/klauspost/cpuid/v2 v2.2.6/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
@@ -495,8 +495,8 @@ github.com/oracle/oci-go-sdk/v65 v65.53.0 h1:/h+rzaRw7W1eSTeDLhSMTRnyXg1oj5NTPeB
 github.com/oracle/oci-go-sdk/v65 v65.53.0/go.mod h1:IBEV9l1qBzUpo7zgGaRUhbB05BVfcDGYRFBCPlTcPp0=
 github.com/parca-dev/parca v0.20.0 h1:G/TdZLbZEArZzd86rI2RqMpUtz0verlvO3+NDP/d0m0=
 github.com/parca-dev/parca v0.20.0/go.mod h1:dKRKjo1MK83iEUygyINUYTAriHICGYejD4EWm5MGT+0=
-github.com/parca-dev/runtime-data v0.0.0-20240221144835-838a856ad496 h1:sTUSBmbMriumcql8S8UwHtfpzYO2GfaivNEs9eY0Ty4=
-github.com/parca-dev/runtime-data v0.0.0-20240221144835-838a856ad496/go.mod h1:NRpa9nozMNUeyw6p6KeuSx+leWBMoJJE7+mN7XUNdpA=
+github.com/parca-dev/runtime-data v0.0.0-20240225202746-241008d5f5c3 h1:hlxBPG8wcI0fd2RLJHKcPIFO36k+9mEMpYb3e8NFbSg=
+github.com/parca-dev/runtime-data v0.0.0-20240225202746-241008d5f5c3/go.mod h1:zSTEFju13hAb35sGVtDwWXXHhRPoVQjDnFEpltj6du4=
 github.com/parquet-go/parquet-go v0.19.0 h1:xtHOBIE0/8CRhmf06V1GJ7q3qARY2/kXiSweFlscwUQ=
 github.com/parquet-go/parquet-go v0.19.0/go.mod h1:6pu/Ca02WRyWyF6jbY1KceESGBZMsRMSijjLbajXaG8=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
@@ -683,8 +683,8 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
-golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
+golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -729,8 +729,8 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
-golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -785,8 +785,8 @@ golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
-golang.org/x/term v0.16.0/go.mod h1:yn7UURbUtPyrVJPGPq404EukNFxcm/foM+bV/bfcDsY=
+golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=