ECL + EQL Standalone Binary
pjb at informatimago.com
Mon Sep 25 23:07:13 UTC 2017
> On 26 Sep 2017, at 00:41, John Mercouris <jmercouris at gmail.com> wrote:
> Hi Pascal, I’ve done exactly as you said and have the following output:
(format nil "~x"(+ 1025 #xe70)) —> "1271"
Since it looks like the functions around this address are unrelated to file accesses, then we may suppose that we have an error due to the modifications made by install_name_tool to the binary.
Try without using this tool.
If my hypothesis is correct, you will have to load the libraries explicitely at run-time as we’ve always done with cffi…
> Honestly, I’m not sure what to make of it, it looks very similar to your output as well,
>> On Sep 25, 2017, at 16:58, Pascal Bourguignon <pjb at informatimago.com <mailto:pjb at informatimago.com>> wrote:
>>> On 25 Sep 2017, at 22:47, John Mercouris <jmercouris at gmail.com <mailto:jmercouris at gmail.com>> wrote:
>>> Hi Pascal,
>>> Thank you for your email,
>>> 1. You’re correct, I had to manually copy the libraries in to the app bundle, I just did something like:
>>> > cp /usr/local/lib/libeql5.1.dylib ./next.app/Contents/Frameworks/
>>> 2. I saw the message is within ECL, I found the exact file with the error message, it is located in ecl/src/c/unixint.d
>>> I figured my problem was unrelated to the libraries, but I wasn’t 100% sure, just wanted to include all information,
>>> 3. I have no idea how to read assembly, I mean I can pick through it, but I won’t be able to really understand what’s going on, nor would I know how to even attach a debugger to the process, are there any other ways that I can examine what’s going on? A source file I can look at? Should I be looking for issues within ECL or EQL?
>> You don’t need to understand the assembly code; you can just watch the name of the functions around the indicated location.
>> In the case of my version of libecl, I would find:
>> [pjb at despina :0.0 documentation]$ otool -t -v -V /opt/local/lib/libecl.dylib|grep -A300 -e '^_cl_boot:'
>> 0000000000001d34 movl 0x22ddce(%rip), %eax
>> 0000000000001d3a testl %eax, %eax
>> #x1d34 + 1025 = #x2135
>> 00000000000020e2 callq 0x151748 ## symbol stub for: _si_getcwd
>> 00000000000020e7 movq %rax, 0x708(%r13)
>> 00000000000020ee movl $0x1003, %esi
>> 00000000000020f3 movl $0x1, %edx
>> 00000000000020f8 movl $0x1, %ecx
>> 00000000000020fd movl $0x1, %r8d
>> 0000000000002103 movl $0x1, %r9d
>> 0000000000002109 movq %r14, %rdi
>> 000000000000210c callq 0x151814 ## symbol stub for: _si_make_vector
>> 0000000000002111 movq %rax, 0x250(%r15)
>> 0000000000002118 movl $0x4, %esi
>> 000000000000211d movl $0x3, %edx
>> 0000000000002122 movl $0x1, %ecx
>> 0000000000002127 movq %rax, %rdi
>> 000000000000212a callq 0x15163a ## symbol stub for: _si_fill_array_with_elt
>> 000000000000212f movq 0x250(%r15), %rax
>> 0000000000002136 movq 0x10(%rax), %rcx
>> 000000000000213a movq %rcx, 0x240(%r15)
>> 0000000000002141 movq 0x20(%rax), %rax
>> 0000000000002145 movq %rax, 0x248(%r15)
>> 000000000000214c movq 0x320(%r15), %rax
>> 0000000000002153 movq %rax, 0x134b0(%r13)
>> 000000000000215a movq 0x22dbef(%rip), %rdx
>> 0000000000002161 movq 0x22dbf0(%rip), %rcx
>> 0000000000002168 leaq 0x4980(%r13), %rdi
>> 000000000000216f movl $0x203, %esi
>> 0000000000002174 callq 0x150026 ## symbol stub for: _cl__make_hash_table
>> 0000000000002179 movq %rax, %r15
>> 000000000000217c movq %r15, 0x22daad(%rip)
>> 0000000000002183 leaq _char_names(%rip), %rbx
>> we can see that calls to SI:GETCWD, SI:MAKE-VECTOR and SI-FILL-ARRAY-WITH-ELT are made just before that address, and a call to CL:MAKE-HASH-TABLE will be called just after.
>> So if I had the error at the same cl_boot+1025 offset, I would infer there’s some problem with the allocation of a vector.
>> (But this is not consistent with your file not found error, so check your own copy of the library, you may find other functions around the cl_boot+1025 address).
>> __Pascal J. Bourguignon__
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