handle execve of different-architecture child: 32 to 64, 64 to 32

[derekbruening]

From [email protected] on February 16, 2009 17:42:26

we'll need to decide from the parent which lib32 vs lib64 to use

xref the analogue on Windows: PR 254193: [x64] inject into
different-architecture child: x64 to WOW64, WOW64 to x64

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=20

[derekbruening]

From [email protected] on February 19, 2009 10:31:34

implemented in r47 :

• on execve we read target file to see whether 32 or 64 and we adjust
  LD_LIBRARY_PATH appropriately: this all assumes we're installed in
  lib32/ and lib64/ with that string nowhere else on the path
• changed linux/execve test to run two tests: one with 32-bit
  linux/execve-sub (hello,world) and one with 64-bit.
  changed regression suite to build both 32 and 64 versions of DR
  before running tests.
• fixed suite/tests/gen_expect.pl to only match whole word defines

Status: Verified