[HARMONY-5624] [drlvm][port][signals] Crash handler crashes on SIGSEGV processing in native thread

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0M6
• Component/s: DRLVM
• Environment: Linux
• Patch Info: Patch Available
• Estimated Complexity: Novice
• Assignee: Gregory Shimansky
• Reporter: Ilya Berezhniuk
• Created: 20/Mar/08 15:21
• Updated: 20/Mar/08 17:14
• Resolved: 20/Mar/08 16:55

Description

While processing PORT_SIGNAL_GPF on Linux, VM callback crashes in check_stack_overflow() function when TLS pointer is NULL (i.e. for native threads not attached to the VM).
Suggested simple patch fixes this issue by checking TLS value before calling check_stack_overflow().