<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=gb2312"> <META content="MSHTML 6.00.2900.3132" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT size=2>Hi all,</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>I am using crosstool to compile Alpha binaries and run it on the M5 simulator. I programmed the binary to be a multi-threaded application. where each thread simply allocate and deallocate a pointer:</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>void thread_main()</FONT></DIV> <DIV><FONT size=2>{</FONT></DIV> <DIV><FONT size=2>int* x = new int[100];</FONT></DIV> <DIV><FONT size=2>delete [] x;</FONT></DIV> <DIV><FONT size=2>}</FONT></DIV> <DIV><FONT size=2> </DIV> <DIV> <DIV><FONT face=ثخجه size=2>I am expecting that the "x"s in each thread is assigned to a different address in the heap. But when debugging the simulator I found that the 4 threads allocate exactly the same address to the 4 "x"s, thus, when they try to deallocate "x", it is freed four times and the application invokes an error:</FONT></DIV> <DIV><FONT face=ثخجه size=2>*** glibc detected *** double free or corruption (fasttop): 0x00000001201d8a40 ***</FONT></DIV> <DIV> </DIV> <DIV>We guess that this problem is due to a thread-unsafe malloc functions. does crosstool provide threadsafe system libraries(malloc)? I would appreciate your help very much!</DIV> <DIV> </DIV> <DIV>I am using demo-alpha.sh with gcc-3.4.5-glibc-2.3.5.dat, the linux version is set to 2.6.13.</DIV> <DIV> </DIV> <DIV>Thanks!</DIV> <DIV> </DIV> <DIV>Jiayuan</DIV></FONT></DIV></BODY></HTML>