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我正在爲Ruby模塊構建一個簡單的C擴展,當我在擴展中調用另一個C函數時,遇到了段錯誤。執行的基本流程是這樣的:Ruby 1.8.7:C擴展中調用函數的Segfault
- 我創建Ruby類,並調用它的一個實例方法,它
- 調用C方法在我的擴展,它
- 調用另一個C函數,在一個單獨的文件,但編譯好吧
這是最後一次跳躍似乎打破。我已經能夠重現幾乎沒有功能的問題,但函數調用。我有一個標準的extconf.rb
,用make編譯這個東西,並且它在encrypt()
的調用中發生了段錯誤。上運行,我發出以下命令:
$ ruby extconf.rb $ make clean $ make $ ruby -r des -e 'puts DES.new.encrypt!'
輸出:
creating Makefile /usr/bin/gcc-4.2 -I. -I/opt/local/lib/ruby/1.8/i686-darwin10 -I/opt/local/lib/ruby/1.8/i686-darwin10 -I. -I/opt/local/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -std=c99 -arch x86_64 -c calc.c /usr/bin/gcc-4.2 -I. -I/opt/local/lib/ruby/1.8/i686-darwin10 -I/opt/local/lib/ruby/1.8/i686-darwin10 -I. -I/opt/local/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -std=c99 -arch x86_64 -c deslib.c /usr/bin/gcc-4.2 -dynamic -bundle -undefined suppress -flat_namespace -o calc.bundle calc.o deslib.o -L. -L/opt/local/lib -L/opt/local/lib -L. -L/opt/local/lib -arch x86_64 -arch x86_64 -lruby -lpthread -ldl -lobjc About to do C encrypt... ./des.rb:42: [BUG] Segmentation fault ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10] zsh: abort ruby -r des -e 'puts DES.new.encrypt!'
的Ruby類:
class D
def encrypt!
self.encrypted = Calc.encrypt(0,0,0)
return self.encrypted
end
end
的計算器模塊:
#include "ruby.h"
#include "cryptlib.h"
VALUE Calc = Qnil;
void Init_calc();
VALUE method_encrypt(VALUE self, VALUE m, VALUE k, VALUE n);
void Init_calc() {
Calc = rb_define_module("Calc");
rb_define_method(Calc, "encrypt", method_encrypt, 3);
}
VALUE method_encrypt(VALUE self, VALUE m, VALUE k, VALUE n) {
uint64_t message = NUM2ULONG(m);
uint64_t key = NUM2ULONG(k);
int iters = NUM2INT(n);
printf("About to do C encrypt...\n");
uint64_t ciphertext = encrypt(message, key, iters);
printf("Done with C encrypt\n");
return ULONG2NUM(ciphertext);
}
cryptlib。 h:
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
uint64_t encrypt(uint64_t message, uint64_t key, int iters);
cryptlib.c:
#include "cryptlib.h"
uint64_t encrypt(uint64_t message, uint64_t key, int iters) {
return 0;
}
爲什麼這個破得厲害?我在MacBook Pro上運行ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
,MacPorts在不到一小時前編譯完成。我gcc --version
: i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)