如何解读JVM生成的hs_err_pidxxx.log中的'Top of Stack'部分

Let's break down your questions about this stack dump section clearly:

What does the second column represent? #

First, let's clarify the structure here: the first column is the starting memory address of the stack segment being dumped. Each subsequent hex value in the row is an 8-byte value stored at (and immediately after) that address—this makes sense because you're looking at a 64-bit system (all addresses are 64-bit hex strings).

In x86_64 architecture (common for Linux systems running Java), the stack grows downward, and each function call creates a stack frame containing:

• The return address (the instruction pointer to jump back to after the function finishes)
• The stack frame pointer (a reference to the previous stack frame's base)
• Function arguments or local variables (or pointers to them)

Your observation that the last column might be a function address is spot-on—those are likely return addresses (points to code in a function's text segment, which you can resolve to a function name using tools like addr2line or jhsdb).

The second column, meanwhile, is often the stack frame pointer (RBP register value) or another stack address pointing to a higher (earlier) stack frame. For example, in your first line:

0x00007f10346be930: 00007f10346be990 00007f1011bb1e15
The value 0x00007f10346be990 looks like a stack address (matches the format of your SP value), which would make sense as a pointer to the previous stack frame's base.

Essentially, every hex value in those rows is just raw data stored on the stack—what that data represents depends on the exact state of the program at the time of the crash (which function was executing, what parameters were passed, etc.).

Are these contents machine-dependent? #

Absolutely—this stack dump is deeply tied to your CPU architecture and operating system:

• Address width: 32-bit systems would show 4-byte addresses/values instead of 8-byte ones.
• Stack growth direction: x86/x86_64 stacks grow downward, but some architectures (like certain ARM variants) have upward-growing stacks.
• Calling conventions: How arguments are passed (via registers vs. pushed to stack), how stack frames are structured, and which registers are used for frame pointers vary between architectures.
• Endianness: While most modern systems use little-endian, big-endian architectures would display these hex values in reverse byte order.

The JVM is just dumping the raw stack memory as it exists for the underlying CPU, so the format and meaning of these values aren't universal across machines.

内容的提问来源于stack exchange，提问作者TomSmartBishop