Module: PryExceptionExplorer::ShimBuilder

Defined in:

lib/pry-exception_explorer/shim_builder.rb

Constant Summary

Dyname =

"so"

ShimCode =

<<-EOF
#include <stdio.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <unistd.h>
#include <ruby.h>

void
rb_raise(unsigned long exc, const char *fmt, ...)
{
  rb_funcall(rb_cObject, rb_intern("raise"), 2, exc, rb_str_new2("hooked exception (pry)"));
}

void
rb_name_error(ID id, const char *fmt, ...)
{
  rb_funcall(rb_cObject, rb_intern("raise"), 2, rb_eNameError, rb_str_new2("hooked exception (pry)"));
}

EOF

Class Attribute Summary (collapse)

• + (Object) dir readonly

  Returns the value of attribute dir.

• + (Object) file readonly

  Returns the value of attribute file.

Class Method Summary (collapse)

• + (Object) compile
• + (Object) create_directory_and_source_file

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# File 'lib/pry-exception_explorer/shim_builder.rb', line 9

def dir
  @dir
end

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# File 'lib/pry-exception_explorer/shim_builder.rb', line 9

def file
  @file
end

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# File 'lib/pry-exception_explorer/shim_builder.rb', line 49

def self.compile
  create_directory_and_source_file

  # -L
  lib_dir = RbConfig::CONFIG['libdir']

  # -I
  arch_include = File.join RbConfig::CONFIG['includedir'], "ruby-1.9.1",  RbConfig::CONFIG['arch']
  backward_include = File.join RbConfig::CONFIG['includedir'], "ruby-1.9.1",  "ruby/backward"
  ruby191_include = File.join RbConfig::CONFIG['includedir'], "ruby-1.9.1"

  if RUBY_PLATFORM =~ /darwin/
    compile_line = "gcc -Wall -L#{lib_dir} -lruby -I#{arch_include}  -I#{backward_include} -I#{ruby191_include} -o lib_overrides.dylib -dynamiclib #{@file}"
  else
    compile_line = "gcc -Wall -O2 -fpic -shared -ldl -g -I#{arch_include}  -I#{backward_include} -I#{ruby191_include} -o lib_overrides.so #{@file}"
  end

  FileUtils.chdir @dir do
    if !system(compile_line)
      raise CompileError, "There was a problem building the shim, aborted!"
    end
  end

end

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# File 'lib/pry-exception_explorer/shim_builder.rb', line 42

def self.create_directory_and_source_file
  FileUtils.mkdir_p(@dir)
  File.open(@file, 'w') do |f|
    f.puts(ShimCode)
  end
end