check your dump partition:
http://kb.vmware.com/kb/1002769
http://kb.vmware.com/kb/1000328
But it depends what crashed that you want to look at. a VM would dump in the vmx directory. The hostd and vpxa both crash in their respective directories either /var/log/vmware or /var/log/vmware/vpx. ESX crashes I typically look at after the vm-support has been run and in that case it is copied from the dump partition to the /root directory. However, the easiest way to see what happened if you are lucky the /var/log/vmkernel file (or vmkernel.1 if its been rolled over) will show the stack trace and some possibly helpfull messages to indicate what happened.
Hope that helps.
Hanna
Hope that helps,
Hanna
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BSCS, VCP2, VCP VI3, VCP vSphere, VCP 5
https://www.ibm.com/developerworks/mydeveloperworks/blogs/vmware-support-ibm