1. A virtual computer system including a plurality of virtual machines operating on a hypervisor, comprising: a trace information collecting section in the hypervisor configured to collect trace information including an operational state of a process on a first virtual machine of the plurality of virtual machines from a context saving area corresponding to the first virtual machine, the process being executed when an interrupt is generated; a plurality of symbol map information collecting sections in the plurality of virtual machines, respectively, configured to collect symbol map information for identifying a process operating on each of the plurality of virtual machines from a management area included in each of the plurality of virtual machines to send the collected symbol map information to the hypervisor; and an analysis processing section in the hypervisor configured to associate the trace information with the symbol map information for each of the processes.