Changes imported from Abseil "staging" branch:

- f0a03a750a36dfbd7ab06d2913430ed5f988fd68 Add absl::RegisterSymbolizer() to mutex_nonprod.cc for AP... by Derek Mauro <dmauro@google.com>
  - f34a2ee35b4f6b321c570c51b0c381647176df63 Add the async signal-safe Symbolizer to Abseil. by Derek Mauro <dmauro@google.com>
  - 6a29ec2d6dc080691f6d32e1982201d1d173bdb3 Document preferred placement of ABSL_CONST_INIT attribute... by Abseil Team <absl-team@google.com>
  - 6f04ed6aa9c19bd717f0e8f422a97f3e3368cf30 Internal change. by Abseil Team <absl-team@google.com>
  - 0af9a330aff8fc0b41dcb3fe519930c36b01a9ef Declare absl::raw_logging_internal::SafeWriteToStderr in ... by Abseil Team <absl-team@google.com>
  - 223ff26745d31dfb4b59c36f3dee5441506af3c2 Fix ABSL_ARRAYSIZE() to handle rvalues. by Xiaoyi Zhang <zhangxy@google.com>

GitOrigin-RevId: f0a03a750a36dfbd7ab06d2913430ed5f988fd68
Change-Id: I491f9cc81ca3ee078fb737cbf8fa9bf6a730eee1

absl/debugging/CMakeLists.txt

@@ -17,6 +17,7 @@
 list(APPEND DEBUGGING_PUBLIC_HEADERS
   "leak_check.h"
   "stacktrace.h"
+  "symbolize.h"
 )
 
 
@@ -25,6 +26,7 @@ list(APPEND DEBUGGING_INTERNAL_HEADERS
   "internal/demangle.h"
   "internal/elf_mem_image.h"
   "internal/stacktrace_config.h"
+  "internal/symbolize.h"
   "internal/vdso_support.h"
 )
 
@@ -32,13 +34,21 @@ list(APPEND DEBUGGING_INTERNAL_HEADERS
 list(APPEND STACKTRACE_SRC
   "stacktrace.cc"
   "internal/address_is_readable.cc"
-  "internal/demangle.cc"
   "internal/elf_mem_image.cc"
   "internal/vdso_support.cc"
   ${DEBUGGING_PUBLIC_HEADERS}
   ${DEBUGGING_INTERNAL_HEADERS}
 )
 
+list(APPEND SYMBOLIZE_SRC
+  "symbolize.cc"
+  "symbolize_elf.inc"
+  "symbolize_unimplemented.inc"
+  "internal/demangle.cc"
+  ${DEBUGGING_PUBLIC_HEADERS}
+  ${DEBUGGING_INTERNAL_HEADERS}
+)
+
 absl_library(
   TARGET
     absl_stacktrace
@@ -48,6 +58,14 @@ absl_library(
     stacktrace
 )
 
+absl_library(
+  TARGET
+    absl_symbolize
+  SOURCES
+    ${SYMBOLIZE_SRC}
+  EXPORT_NAME
+    symbolize
+)
 
 list(APPEND LEAK_CHECK_SRC
   "leak_check.cc"
@@ -112,9 +130,19 @@ absl_test(
   SOURCES
     ${DEMANGLE_TEST_SRC}
   PUBLIC_LIBRARIES
-    absl_stacktrace absl_stack_consumption
+    absl_symbolize absl_stack_consumption
 )
 
+list(APPEND SYMBOLIZE_TEST_SRC "symbolize_test.cc")
+
+absl_test(
+  TARGET
+    symbolize_test
+  SOURCES
+    ${SYMBOLIZE_TEST_SRC}
+  PUBLIC_LIBRARIES
+    absl_symbolize absl_stack_consumption
+)
 
 # test leak_check_test
 list(APPEND LEAK_CHECK_TEST_SRC "leak_check_test.cc")