many Android tests fail

Split from #1726

These are tests I had to disable from the already-limited set of pattern-only tests we set up for x64, as it is non-trivial to get them working. After fixing these we should extend the set of tests for both x64 and Android.

*\ TODO fuzz tests fail with disturbing heap alloc failures

55: ~~Dr.M~~ Not tested - Save and restore shadow registers @/work/drmemory/git/src/drmemory/fuzzer.c:990

55: <Application /data/local/tmp/build_DRtoo_android_dbg/tests/fuzz_buffer (16809).  Internal Error: DynamoRIO debug check failure: /work/drmemory/git/src/dynamorio/core/heap.c:3298 size < MAX_VALID_HEAP_ALLOCATION && "potential integer overflow"

11: ~~Dr.M~~ ASSERT FAILURE (thread 20728): /work/drmemory/git/src/drmemory/fuzzer.c:1276: false (Failed to allocate fuzz input buffer
11: )

*\ TODO line numbers are off?

8:   /work/drmemory/git/build_DRtoo_android_dbg/tests/logs/DrMemory-malloc.pattern.17786.000/results.txt
8:   failed to match "malloc\.c:179", found "malloc.c:180" instead
8: 
8: 
 8/53 Test  #8: malloc.pattern ....................***Failed   10.67 sec

*\ TODO exitcode tests fail b/c adb shell doesn't return the code

This is a known bug in adb: https://code.google.com/p/android/issues/detail?id=3254

*\ TODO shell-interpreted chars in fuzz descriptors make running over adb shell very painful

61: Running |adb;shell;/data/local/tmp/build_DRtoo_android_dbg/bin/drmemory;-debug;-dr_debug;-dr;/data/local/tmp/build_DRtoo_android_dbg/dynamorio;-batch;-dr_ops;-dumpcore_mask;-dr_ops;0;-callstack_style;0x27;-no_results_to_stderr;-no_fuzz_dump_on_error;-fuzz_target;<main>!repeatme|2|0|1|10;-fuzz_mutator_alg;random;-fuzz_mutator_unit;num;-fuzz_mutator_flags;0x0;-fuzz_mutator_sparsity;0;--;/data/local/tmp/build_DRtoo_android_dbg/tests/fuzz_buffer;initialize|
61: STDOUT: /system/bin/sh: 2: not found
61: /system/bin/sh: can't open main: No such file or directory
61: /system/bin/sh: 0: not found
61: /system/bin/sh: 1: not found
61: /system/bin/sh: 10: not found

Actually it's quite difficult to escape all these chars through "adb shell" and "/system/bin/sh": I gave up after a few attempts.

*\ TODO unit_tests claims to pass but fails

1: Test command: /extsw/android/android-sdk-linux/platform-tools/adb "shell" "/data/local/tmp/build_DRtoo_android_dbg/bin/unit_tests"
1: Test timeout computed to be: 9.99988e+06
1: CANNOT LINK EXECUTABLE: library "libdynamorio.so" not found
 1/53 Test  #1: unit_tests ........................   Passed    0.07 sec

For fuzz test, the error comes from the wrong fuzz target function size argument. We tries to get size info from repeatme(buffer, size). However, in get_priv_mcontext_from_dstack

gdb) p/x *(priv_mcontext_t *)(dcontext->dstack - sizeof(priv_mcontext_t))
$10 = {r0 = 0xbe8fca50, r1 = 0x55059c98, r2 = 0xb0850858, r3 = 0x10, r4 = 0x4, r5 = 0x2, r6 = 0xb0f59828, r7 = 0xbe8fca44, r8 = 0x2, r9 = 0xbe8fca50, r10 = 0x0, r11 = 0x0, r12 = 0x54e29000, {
    r13 = 0xbe8fca0c, sp = 0xbe8fca0c, xsp = 0xbe8fca0c}, {r14 = 0x7399e501, lr = 0x7399e501}, {r15 = 0x54e3aec4, pc = 0x54e3aec4}, {xflags = 0xb0f59a54, apsr = 0xb0f59a54, cpsr = 0xb0f59a54},
...

It looks like the value is off by two reg size, where r2 is holding the actual r0 value, and r3 is holding the r1 value. The cause is in insert_push_all_registers, which did not preserve the mcontext struct.

DynamoRIO / drmemory

many Android tests fail #1860