Date: Wed, 01 Oct 2025 19:15:33 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 289945] lldb; set breakpoint not hit on 32b binary Message-ID: <bug-289945-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289945 Bug ID: 289945 Summary: lldb; set breakpoint not hit on 32b binary Product: Base System Version: Unspecified Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: martin@bxlr.sk Simple demo: #include <stdio.h> int main() { puts("hello world"); return 42; } Compiled as: $ clang -O0 -g -o test test.c $ lldb -O 'breakpoint set -n main' test (lldb) r Process 19470 launched: '/home/martin/forums/test' (x86_64) Process 19470 stopped * thread #1, name = 'test', stop reason = breakpoint 1.1 frame #0: 0x00000000002016bf test`main at test.c:4:2 1 #include <stdio.h> 2 3 int main() { -> 4 puts("hello world"); 5 return 42; 6 } (lldb) breakpoint list Current breakpoints: 1: name = 'main', locations = 1, resolved = 1, hit count = 1 1.1: where = test`main + 15 at test.c:4:2, address = 0x00000000002016bf, resolved, hit count = 1 Works as expected. However breakpoint is not hit with 32b version of the same program: $ clang -m32 -O0 -g -o test test.c $ lldb -a i386 -O 'breakpoint set -n main' test (lldb) breakpoint set -n main Breakpoint 1: no locations (pending). Breakpoint set in dummy target, will get copied into future targets. (lldb) target create --arch=i386 "test" Current executable set to '/home/martin/forums/test' (i386). (lldb) r Process 19490 launched: '/home/martin/forums/test' (i386) hello world Process 19490 exited with status = 42 (0x0000002a) (lldb) Doesn't help if I sent the breakpoint on address either: $ readelf -h test | grep Entry Entry point address: 0x401470 lldb -a i386 -O 'breakpoint set -a 0x401470' test (lldb) breakpoint set -a 0x401470 Breakpoint 1: address = 0x0000000000401470 Breakpoint set in dummy target, will get copied into future targets. (lldb) target create --arch=i386 "test" Current executable set to '/home/martin/forums/test' (i386). (lldb) r Process 19502 launched: '/home/martin/forums/test' (i386) hello world Process 19502 exited with status = 42 (0x0000002a) (lldb) breakpoint list Current breakpoints: 1: address = 0x0000000000401470, locations = 1 1.1: address = 0x0000000000401470, unresolved, hit count = 0 That address is a bit suspicious too as it should be working with 32b address. -- You are receiving this mail because: You are the assignee for the bug.home | help
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