Disallow duma/ltrace/strace for bionic

Allow cross-gdb and gdbserver. This requires removal of an explicit
check that disables gdbserver on android. However, the comment above
that check refers to exec_elf.h, which has been removed since API level
19. It builds fine with current selection of the sample (21). Only
build-tested, hope someone can give it a try and report back.

We can fine tune the check for GDB but I'll leave it for now.

Signed-off-by: Alexey Neyman <stilor@att.net>

config/debug/duma.in

@@ -1,6 +1,7 @@
 # D.U.M.A. - Detect Unintended Memory Access - Memory checker
 
 ## depends on ! BARE_METAL
+## depends on ! LIBC_bionic
 
 ## help D.U.M.A. - Detect Unintended Memory Access
 ## help A memory bound checker, with additional features.

config/debug/gdb.in.native

@@ -4,6 +4,7 @@ config GDB_NATIVE
     bool
     prompt "Native gdb"
     depends on ! BARE_METAL
+    depends on ! LIBC_bionic
     select EXPAT_TARGET
     select NCURSES_TARGET
     help

config/debug/ltrace.in

@@ -1,6 +1,7 @@
 # ltrace
 
 ## select LIBELF_TARGET
+## depends on ! LIBC_bionic
 ##
 ## help ltrace is a program that simply runs the specified command until it exits.
 ## help It intercepts and records the dynamic library calls which are called by

config/debug/strace.in

@@ -1,5 +1,7 @@
 # strace
 
+## depends on ! LIBC_bionic
+
 choice
     bool
     prompt "strace version"

patches/gdb/7.12.1/200-allow-android.patch

@@ -0,0 +1,42 @@
+diff -urpN gdb-7.12.1.orig/gdb/gdbserver/configure gdb-7.12.1/gdb/gdbserver/configure
+--- gdb-7.12.1.orig/gdb/gdbserver/configure	2017-05-14 17:02:46.742711695 -0700
++++ gdb-7.12.1/gdb/gdbserver/configure	2017-05-14 17:03:22.147058607 -0700
+@@ -6671,17 +6671,6 @@ fi
+ 
+ 
+ case "${target}" in
+-  *-android*)
+-    # Starting with NDK version 9, <elf.h> actually includes definitions
+-    # of Elf32_auxv_t and Elf64_auxv_t. But sadly, <elf.h> includes
+-    # <sys/exec_elf.h> which defines some of the ELF types incorrectly,
+-    # leading to conflicts with the defintions from <linux/elf.h>.
+-    # This makes it impossible for us to include both <elf.h> and
+-    # <linux/elf.h>, which means that, in practice, we do not have
+-    # access to Elf32_auxv_t and Elf64_auxv_t on this platform.
+-    # Therefore, do not try to auto-detect availability, as it would
+-    # get it wrong on this platform.
+-    ;;
+   *)
+     ac_fn_c_check_type "$LINENO" "Elf32_auxv_t" "ac_cv_type_Elf32_auxv_t" "#include <elf.h>
+ 
+diff -urpN gdb-7.12.1.orig/gdb/gdbserver/configure.ac gdb-7.12.1/gdb/gdbserver/configure.ac
+--- gdb-7.12.1.orig/gdb/gdbserver/configure.ac	2017-05-14 17:02:46.742711695 -0700
++++ gdb-7.12.1/gdb/gdbserver/configure.ac	2017-05-14 17:03:53.219361720 -0700
+@@ -179,17 +179,6 @@ AC_CHECK_TYPES(socklen_t, [], [],
+ ])
+ 
+ case "${target}" in
+-  *-android*)
+-    # Starting with NDK version 9, <elf.h> actually includes definitions
+-    # of Elf32_auxv_t and Elf64_auxv_t. But sadly, <elf.h> includes
+-    # <sys/exec_elf.h> which defines some of the ELF types incorrectly,
+-    # leading to conflicts with the defintions from <linux/elf.h>.
+-    # This makes it impossible for us to include both <elf.h> and
+-    # <linux/elf.h>, which means that, in practice, we do not have
+-    # access to Elf32_auxv_t and Elf64_auxv_t on this platform.
+-    # Therefore, do not try to auto-detect availability, as it would
+-    # get it wrong on this platform.
+-    ;;
+   *)
+     AC_CHECK_TYPES([Elf32_auxv_t, Elf64_auxv_t], [], [],
+     #include <elf.h>

samples/aarch64-unknown-linux-android/crosstool.config

@@ -1,3 +1,4 @@
+CT_EXPERIMENTAL=y
 CT_ARCH_arm=y
 CT_ARCH_64=y
 CT_ARCH_ARCH="armv8-a"
@@ -6,4 +7,5 @@ CT_KERNEL_linux=y
 CT_LIBC_BIONIC_V_14b=y
 CT_ANDROID_API_21=y
 CT_CC_LANG_CXX=y
+CT_DEBUG_gdb=y
 CT_GETTEXT=y