Merge "Move tools to separate directory."

am: d312abe7c0

Change-Id: I824bf8bb7598383c9ffa4da8b9ffc1c7ded04268

4 files changed, 286 insertions, 11 deletions

diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index a6044c8..e6d3bff 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -150,10 +150,10 @@ cc_test {
 }
 
 //-------------------------------------------------------------------------
-// Utility Executables
+// Tools
 //-------------------------------------------------------------------------
 cc_defaults {
-    name: "libunwindstack_executables",
+    name: "libunwindstack_tools",
     defaults: ["libunwindstack_flags"],
 
     shared_libs: [
@@ -161,18 +161,40 @@ cc_defaults {
         "libbase",
         "liblzma",
     ],
+}
 
-    static_libs: [
-        "liblog",
+cc_binary {
+    name: "unwind",
+    defaults: ["libunwindstack_tools"],
+
+    srcs: [
+        "tools/unwind.cpp",
     ],
+
+    target: {
+        linux: {
+            host_ldlibs: [
+                "-lrt",
+            ],
+        },
+    },
 }
 
 cc_binary {
     name: "unwind_info",
-    defaults: ["libunwindstack_executables"],
+    defaults: ["libunwindstack_tools"],
+
+    srcs: [
+        "tools/unwind_info.cpp",
+    ],
+}
+
+cc_binary {
+    name: "unwind_symbols",
+    defaults: ["libunwindstack_tools"],
 
     srcs: [
-        "unwind_info.cpp",
+        "tools/unwind_symbols.cpp",
     ],
 }
 
diff --git a/libunwindstack/tools/unwind.cpp b/libunwindstack/tools/unwind.cpp
new file mode 100644
index 0000000..34cd1ce
--- /dev/null
+++ b/libunwindstack/tools/unwind.cpp
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ptrace.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "Elf.h"
+#include "Maps.h"
+#include "Memory.h"
+#include "Regs.h"
+
+static bool Attach(pid_t pid) {
+  if (ptrace(PTRACE_ATTACH, pid, 0, 0) == -1) {
+    return false;
+  }
+
+  // Allow at least 1 second to attach properly.
+  for (size_t i = 0; i < 1000; i++) {
+    siginfo_t si;
+    if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
+      return true;
+    }
+    usleep(1000);
+  }
+  printf("%d: Failed to stop.\n", pid);
+  return false;
+}
+
+static bool Detach(pid_t pid) {
+  return ptrace(PTRACE_DETACH, pid, 0, 0) == 0;
+}
+
+void DoUnwind(pid_t pid) {
+  RemoteMaps remote_maps(pid);
+  if (!remote_maps.Parse()) {
+    printf("Failed to parse map data.\n");
+    return;
+  }
+
+  uint32_t machine_type;
+  Regs* regs = Regs::RemoteGet(pid, &machine_type);
+  if (regs == nullptr) {
+    printf("Unable to get remote reg data\n");
+    return;
+  }
+
+  bool bits32 = true;
+  printf("ABI: ");
+  switch (machine_type) {
+    case EM_ARM:
+      printf("arm");
+      break;
+    case EM_386:
+      printf("x86");
+      break;
+    case EM_AARCH64:
+      printf("arm64");
+      bits32 = false;
+      break;
+    case EM_X86_64:
+      printf("x86_64");
+      bits32 = false;
+      break;
+    default:
+      printf("unknown\n");
+      return;
+  }
+  printf("\n");
+
+  MemoryRemote remote_memory(pid);
+  for (size_t frame_num = 0; frame_num < 64; frame_num++) {
+    if (regs->pc() == 0) {
+      break;
+    }
+    MapInfo* map_info = remote_maps.Find(regs->pc());
+    if (map_info == nullptr) {
+      printf("Failed to find map data for the pc\n");
+      break;
+    }
+
+    Elf* elf = map_info->GetElf(pid, true);
+
+    uint64_t rel_pc = regs->GetRelPc(elf, map_info);
+    uint64_t adjusted_rel_pc = rel_pc;
+    // Don't need to adjust the first frame pc.
+    if (frame_num != 0) {
+      adjusted_rel_pc = regs->GetAdjustedPc(rel_pc, elf);
+    }
+
+    std::string name;
+    if (bits32) {
+      printf("  #%02zu pc %08" PRIx64, frame_num, adjusted_rel_pc);
+    } else {
+      printf("  #%02zu pc %016" PRIx64, frame_num, adjusted_rel_pc);
+    }
+    if (!map_info->name.empty()) {
+      printf("  %s", map_info->name.c_str());
+      if (map_info->elf_offset != 0) {
+        printf(" (offset 0x%" PRIx64 ")", map_info->elf_offset);
+      }
+    } else {
+      printf("  <anonymous:%" PRIx64 ">", map_info->offset);
+    }
+    uint64_t func_offset;
+    if (elf->GetFunctionName(adjusted_rel_pc, &name, &func_offset)) {
+      printf(" (%s", name.c_str());
+      if (func_offset != 0) {
+        printf("+%" PRId64, func_offset);
+      }
+      printf(")");
+    }
+    printf("\n");
+
+    if (!elf->Step(rel_pc + map_info->elf_offset, regs, &remote_memory)) {
+      break;
+    }
+  }
+}
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    printf("Usage: unwind <PID>\n");
+    return 1;
+  }
+
+  pid_t pid = atoi(argv[1]);
+  if (!Attach(pid)) {
+    printf("Failed to attach to pid %d: %s\n", pid, strerror(errno));
+    return 1;
+  }
+
+  DoUnwind(pid);
+
+  Detach(pid);
+
+  return 0;
+}
diff --git a/libunwindstack/unwind_info.cpp b/libunwindstack/tools/unwind_info.cpp
index da1522b..e889f8c 100644
--- a/libunwindstack/unwind_info.cpp
+++ b/libunwindstack/tools/unwind_info.cpp
@@ -21,8 +21,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/mman.h>
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 #include "ArmExidx.h"
@@ -115,10 +115,6 @@ int main(int argc, char** argv) {
     printf("%s is not a regular file.\n", argv[1]);
     return 1;
   }
-  if (S_ISDIR(st.st_mode)) {
-    printf("%s is a directory.\n", argv[1]);
-    return 1;
-  }
 
   // Send all log messages to stdout.
   log_to_stdout(true);
diff --git a/libunwindstack/tools/unwind_symbols.cpp b/libunwindstack/tools/unwind_symbols.cpp
new file mode 100644
index 0000000..c010dfc
--- /dev/null
+++ b/libunwindstack/tools/unwind_symbols.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "Elf.h"
+#include "ElfInterface.h"
+#include "Log.h"
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    printf("Need to pass the name of an elf file to the program.\n");
+    return 1;
+  }
+
+  struct stat st;
+  if (stat(argv[1], &st) == -1) {
+    printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
+    return 1;
+  }
+  if (!S_ISREG(st.st_mode)) {
+    printf("%s is not a regular file.\n", argv[1]);
+    return 1;
+  }
+
+  // Send all log messages to stdout.
+  log_to_stdout(true);
+
+  MemoryFileAtOffset* memory = new MemoryFileAtOffset;
+  if (!memory->Init(argv[1], 0)) {
+    printf("Failed to init\n");
+    return 1;
+  }
+
+  Elf elf(memory);
+  if (!elf.Init() || !elf.valid()) {
+    printf("%s is not a valid elf file.\n", argv[1]);
+    return 1;
+  }
+
+  switch (elf.machine_type()) {
+    case EM_ARM:
+      printf("ABI: arm\n");
+      break;
+    case EM_AARCH64:
+      printf("ABI: arm64\n");
+      break;
+    case EM_386:
+      printf("ABI: x86\n");
+      break;
+    case EM_X86_64:
+      printf("ABI: x86_64\n");
+      break;
+    default:
+      printf("ABI: unknown\n");
+      return 1;
+  }
+
+  // This is a crude way to get the symbols in order.
+  std::string name;
+  uint64_t load_bias = elf.interface()->load_bias();
+  for (const auto& entry : elf.interface()->pt_loads()) {
+    uint64_t start = entry.second.offset + load_bias;
+    uint64_t end = entry.second.table_size + load_bias;
+    for (uint64_t addr = start; addr < end; addr += 4) {
+      std::string cur_name;
+      uint64_t func_offset;
+      if (elf.GetFunctionName(addr, &cur_name, &func_offset)) {
+        if (cur_name != name) {
+          printf("<0x%" PRIx64 "> Function: %s\n", addr - func_offset, cur_name.c_str());
+        }
+        name = cur_name;
+      }
+    }
+  }
+
+  return 0;
+}