Remove dladdr fallback and implementation

Cargo.toml

@@ -35,7 +35,12 @@ cpp_demangle = { default-features = false, version = "0.2.3", optional = true }
 
 # Optional dependencies enabled through the `gimli-symbolize` feature
 addr2line = { version = "0.11.0", optional = true, default-features = false, features = ['std'] }
-goblin = { version = "0.2", optional = true, default-features = false, features = ['elf32', 'elf64', 'mach32', 'mach64', 'pe32', 'pe64', 'std'] }
+
+[dependencies.object]
+version = "0.19"
+optional = true
+default-features = false
+features = ['read_core', 'elf', 'macho', 'pe']
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.3", optional = true }
@@ -49,7 +54,7 @@ winapi = { version = "0.3.3", optional = true }
 # Note that not all features are available on all platforms, so even though a
 # feature is enabled some other feature may be used instead.
 [features]
-default = ["std", "libunwind", "libbacktrace", "dladdr", "dbghelp"]
+default = ["std", "libunwind", "libbacktrace", "dbghelp"]
 
 # Include std support.
 std = []
@@ -81,17 +86,13 @@ kernel32 = []
 #   can also provide filename/line number information if debuginfo is
 #   compiled in. This library currently only primarily works on unixes that
 #   are not OSX, however.
-# - dladdr: this feature uses the dladdr(3) function (a glibc extension) to
-#   resolve symbol names. This is fairly unreliable on linux, but works well
-#   enough on OSX.
 # - gimli-symbolize: use the `gimli-rs/addr2line` crate to symbolicate
 #   addresses into file, line, and name using DWARF debug information. At
 #   the moment, this is only possible when targetting Linux, since macOS
 #   splits DWARF out into a separate object file. Enabling this feature
 #   means one less C dependency.
 libbacktrace = ["backtrace-sys/backtrace-sys"]
-dladdr = []
-gimli-symbolize = ["addr2line", "goblin"]
+gimli-symbolize = ["addr2line", "object"]
 
 #=======================================
 # Methods of serialization
@@ -105,6 +106,7 @@ serialize-serde = ["serde"]
 #
 # Only here for backwards compatibility purposes, they do nothing now.
 coresymbolication = []
+dladdr = []
 
 #=======================================
 # Internal features for testing and such.

crates/without_debuginfo/Cargo.toml

@@ -12,9 +12,6 @@ features = [
   'libunwind',
   'dbghelp',
 
-  # Allow fallback to dladdr
-  'dladdr',
-
   # Yes, we have `std`
   'std',
 ]