add better support for callstack frames in non-PE-modules

_From [bruen...@google.com](https://code.google.com/u/109494838902877177630/) on April 30, 2013 09:55:14_

pasting from a user email:

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Everything seems to work as expected except that memory access errors in stack frames (i.e. anything in the elf module) appear only one stack frame above the calling windows application.

E.g. I get a stack that looks like this:

#0 (0x0511b11e) modid:0
#1 loader.dll!runELF (0x102131d0 ) modid:7
#2 loader.dll!func5 (0x102131d0 ) modid:7
#3 loader.dll!func4 (0x101352f5 ) modid:7
#4 loader.dll!func3 (0x101355ef ) modid:7
#5 loader.dll!func2 (0x1013519b ) modid:7
#6 loader.dll!func1 (0x100dbfb9 ) modid:7
#7 KERNEL32.dll!BaseThreadInitThunk (0x76dc33aa ) modid:5
#8 ntdll.dll!RtlInitializeExceptionChain (0x77be9ef2 ) modid:6
#9 ntdll.dll!RtlInitializeExceptionChain (0x77be9ec5 ) modid:6

Where I would expect a stack that looks like:

#0 (0x0511b11e) modid:0
#1 (0x0511b0a0) modid:0
#2 (0x0511b1ad) modid:0
#3 loader.dll!runELF (0x102131d0 ) modid:7
#4 loader.dll!func5 (0x102131d0 ) modid:7
#5 loader.dll!func4 (0x101352f5 ) modid:7
#6 loader.dll!func3 (0x101355ef ) modid:7
#7 loader.dll!func2 (0x1013519b ) modid:7
#8 loader.dll!func1 (0x100dbfb9 ) modid:7
#9 KERNEL32.dll!BaseThreadInitThunk (0x76dc33aa ) modid:5
#10 ntdll.dll!RtlInitializeExceptionChain (0x77be9ef2 ) modid:6
#11 ntdll.dll!RtlInitializeExceptionChain (0x77be9ec5 ) modid:6

Additionally, the stack frame(s) disappear entirely when the ELF calls back into windows code, i.e. I get something like

#0 loader.dll!func6 (0x102231d0 ) modid:7
#1 loader.dll!runELF (0x102131d0 ) modid:7
#2 loader.dll!func5 (0x102131d0 ) modid:7
#3 loader.dll!func4 (0x101352f5 ) modid:7
#4 loader.dll!func3 (0x101355ef ) modid:7
#5 loader.dll!func2 (0x1013519b ) modid:7
#6 loader.dll!func1 (0x100dbfb9 ) modid:7
#7 KERNEL32.dll!BaseThreadInitThunk (0x76dc33aa ) modid:5
#8 ntdll.dll!RtlInitializeExceptionChain (0x77be9ef2 ) modid:6
#9 ntdll.dll!RtlInitializeExceptionChain (0x77be9ec5 ) modid:6

where I would expect half a dozen frames between 0 & 1.
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We should try to replace is_in_module() in is_retaddr() with a check for is_in_code_region() that includes DGC and non-PE mapped files.

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=1201_