Date: Fri, 3 Aug 2001 14:16:17 -0700 From: Tabor Kelly <pdxmax@dsl-only.net> To: freebsd-hackers@freebsd.org Subject: problems with kvm_nlist() Message-ID: <146809363.20010803141617@dsl-only.net>
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------------CF1373321FB864C Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I am using kvm_nlist() in one of my programs. I have written a smaller test program for use here. Either kvm_nlist() has a bug or I am very confused. According to kvm_nlist(3), kvm_nlist should go through an array of nlist structures and fill out each structure with that symbol's information. Well, as far as I can tell, it fills out all of the structures with the information from the symbol in the first structure. Has anybody else seen this behavior? Attached is a file named test.cpp that should reproduce this behavior. If you want to play with this behavior, change what structure is pointed to when calling kvm_nlist on line 38 of the program source. Also, be aware that you will have to make the following modifications to the file permissions after you compile it (if you don't want to run it as root): # chown root:kmem a.out # chmod g+s a.out Thank You, Tabor Kelly ------------CF1373321FB864C Content-Type: application/octet-stream; name="test.cpp" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="test.cpp" Ly90ZXN0LmNwcA0KLy9jb21waWxlIHdpdGggZ2NjIHRlc3QuY3BwIC1sc3RkYysrIC1sa3ZtDQoN CiNpbmNsdWRlIDxmY250bC5oPg0KI2luY2x1ZGUgPGlvc3RyZWFtPg0KI2luY2x1ZGUgPHB0aHJl YWQuaD4NCiNpbmNsdWRlIDxzdHJpbmcuaD4NCiNpbmNsdWRlIDx1bmlzdGQuaD4NCiNpbmNsdWRl IDxzeXMvZGtzdGF0Lmg+DQojaW5jbHVkZSA8a3ZtLmg+DQojaW5jbHVkZSA8bmxpc3QuaD4NCiNp bmNsdWRlIDxzdGRpby5oPg0KDQptYWluKCkNCnsNCiAgaW50IGkgPSBOVUxMOw0KICBpbnQgbyA9 IE5VTEw7DQogIGNoYXIgZXJyb3JCdWZmW19QT1NJWDJfTElORV9NQVhdOw0KICBrdm1fdCAqcEt2 bSA9IE5VTEw7DQogIHN0cnVjdCBubGlzdCBzdHJ1Y3RObGlzdFs3XTsNCiAgYnplcm8oJnN0cnVj dE5saXN0WzBdLCAoc2l6ZW9mKHN0cnVjdCBubGlzdCkgKiA3KSk7DQoNCiAgc3RydWN0Tmxpc3Rb MF0ubl9uYW1lID0gIl9jY3B1IjsNCiAgc3RydWN0Tmxpc3RbMV0ubl9uYW1lID0gIl9jcF90aW1l IjsNCiAgc3RydWN0Tmxpc3RbMl0ubl9uYW1lID0gIl9hdmVydW5uYWJsZSI7DQogIHN0cnVjdE5s aXN0WzNdLm5fbmFtZSA9ICJfYnVmc3BhY2UiOw0KICBzdHJ1Y3RObGlzdFs0XS5uX25hbWUgPSAi X2NudCI7DQogIHN0cnVjdE5saXN0WzVdLm5fbmFtZSA9ICJfbmV4dHBpZCI7DQoNCiAgcEt2bSA9 IGt2bV9vcGVuZmlsZXMoTlVMTCwgTlVMTCwgTlVMTCwgT19SRE9OTFksICZlcnJvckJ1ZmZbMF0p Ow0KICBpZiAocEt2bSA9PSBOVUxMKQ0KICB7DQoJY291dCA8PCAiRXJyb3I6IGt2bV9vcGVuZmls ZXMoKSBmYWlsZWQhXG4iOw0KCWNvdXQgPDwgIlx0XCIiIDw8IGVycm9yQnVmZiA8PCAiXCJcbiI7 DQoJcmV0dXJuIDE7DQogIH0NCg0KICBvID0ga3ZtX25saXN0KHBLdm0sICZzdHJ1Y3RObGlzdFsw XSk7IC8vY2hhbmdlIHdoaWNoIGl0ZW0gaXMgcG9pbnRlZCB0byBmb3IgaW50ZXJlc3RpbmcgcmVz dWx0cy4NCiAgaWYgKG8gPCAwKQ0KICB7DQoJY291dCA8PCAiRXJyb3I6IGt2bV9ubGlzdCgpIGZh aWxlZCFcbiI7DQoJY291dCA8PCAiXHRcIiIgPDwga3ZtX2dldGVycihwS3ZtKSA8PCAiXCJcbiI7 DQoJcmV0dXJuIDE7DQogIH0NCg0KICBjb3V0IDw8IG8gPDwgIiBpdGVtcyBpbiB0aGUgbGlzdCB3 ZXJlIGJhZFxuIjsNCg0KDQogIGZvcihpID0gMDsgaSA8IDY7IGkrKykNCiAgew0KCWNvdXQgPDwg InN0cnVjdE5saXN0WyIgPDwgaSA8PCAiXS5uX25hbWU6ICIgPDwgc3RydWN0Tmxpc3RbaV0ubl9u YW1lDQoJCSA8PCAiXG4iOw0KCWNvdXQgPDwgInN0cnVjdE5saXN0WyIgPDwgaSA8PCAiXS5uX3R5 cGU6ICIgPDwgc3RydWN0Tmxpc3RbaV0ubl90eXBlDQoJCSA8PCAiXG4iOw0KCWNvdXQgPDwgInN0 cnVjdE5saXN0WyIgPDwgaSA8PCAiXS5uX3ZhbHVlOiAiIDw8IHN0cnVjdE5saXN0WzBdLm5fdmFs dWUNCgkJIDw8ICJcbiI7DQogIH0NCg0KICBrdm1fY2xvc2UocEt2bSk7DQp9DQo= ------------CF1373321FB864C-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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