JDK-8261098 : Add clhsdb "findsym" command
- Type: Enhancement
- Component: hotspot
- Sub-Component: svc-agent
- Affected Version: 17
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2021-02-03
- Updated: 2021-03-13
- Resolved: 2021-02-19
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| JDK 17 |
|---|
17 b11Fixed  |
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Description
There is currently no way to map a native symbol to its address, which is basically the opposite of what "findpc" does. It's very easy to add that support:
new Command("findsym", "findsym name", false) {
public void doit(Tokens t) {
if (t.countTokens() != 1) {
usage();
} else {
out.println(VM.getVM().getDebugger().lookup(null, t.nextToken()));
}
}
},
And this is what it allows you to do:
hsdb> findsym MaxJNILocalCapacity
0x00007f3c3def6e20
hsdb> findpc 0x00007f3c3def6e20
Address 0x00007f3c3def6e20: MaxJNILocalCapacity
hsdb> examine 0x00007f3c3def6e20
0x00007f3c3def6e20: 0x0000000000010000
And 0x10000 is indeed the default value for MaxJNILocalCapacity as seen in globals.hpp:
product(intx, MaxJNILocalCapacity, 65536, \
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