Hi guys, I'm seeing some strange thread stack size behavior while porting to Mac, and I've been trying to compare to a build on a 64bit linux (Debian 6). Here's what I see on Linux, whatever I can define for my Xss, the stack size in init_psd_structure always calculates 8M : ========================================================================== queinnec@squeezy:~/Code/harmony-svn-java6/target/hdk/jdk$ ./bin/java -Xmx1024m -Xss12m -version init_psd_structure: stack_size = 8388608 init_psd_structure: guard_size = 4096 init_psd_structure: mem_protect_size = 1024 PMQ - setup_stack - (&res - mem_protect_size) = 140736255271036 PMQ - setup_stack - (guard_page_addr + guard_page_size = 140736246960128 PMQ - setup_stack - (&res - mem_protect_size) = 140715543796204 PMQ - setup_stack - (guard_page_addr + guard_page_size = 140715541778432 PMQ - setup_stack - (&res - mem_protect_size) = 140715528108524 PMQ - setup_stack - (guard_page_addr + guard_page_size = 140715515604992 PMQ - setup_stack - (&res - mem_protect_size) = 140715515521516 PMQ - setup_stack - (guard_page_addr + guard_page_size = 140715513503744 PMQ - setup_stack - (&res - mem_protect_size) = 140715513420268 PMQ - setup_stack - (guard_page_addr + guard_page_size = 140715511402496 Apache Harmony Launcher : (c) Copyright 1991, 2010 The Apache Software Foundation or its licensors, as applicable. java version "1.5.0" Apache Harmony (1.5.0) DRLVM (1.5.0-r1092753) pre-alpha : not complete or compatible svn = r1092753, (Apr 15 2011), Linux/em64t/gcc 4.4.5, release build (patch attached, maybe I just missed something obvious... I've seen some maybe related JIRA but they were supposed to be closed) As a second question, in drlvm/vm/port/src/thread/linux/thread_os.c there's this test : if ((size_t)(&res) - PSD->mem_protect_size < (size_t)tlsdata->guard_page_addr + tlsdata->guard_page_size) return EINVAL; I'm not sure I get this... Anyone care to explain? As a side note, the port seems to start fine but crashes after starting some threads. Cheers, -- Pierre Queinnec |
drlvm-stacksize-printf.diff
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