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Jerry Feng
Jerry Feng

Reputation: 115

LLDB: Setting a breakpoint for malloc_error_break through the console

I'm running into some malloc-related issues in my code:

malloc: *** error for object 0x103401e28: incorrect checksum for freed object - object was probably modified after being freed.
*** set a breakpoint in malloc_error_break to debug

I've tried things like:

(lldb) breakpoint set malloc_error_break
error: invalid combination of options for the given command

How do I set this breakpoint using the terminal? I've searched online and only found results involving Xcode.

Upvotes: 11

Views: 12448

Answers (1)

Jim Ingham
Jim Ingham

Reputation: 27203

If you are familiar with gdb, then this little cheat-sheet might help:

http://lldb.llvm.org/lldb-gdb.html

Also:

(lldb) help break set

will give you lots of information about setting breakpoints in lldb.

In this case:

(lldb) br set --name malloc_error_break
(lldb) br set -n malloc_error_break

or:

(lldb) b malloc_error_break

The first examples use breakpoint set which is a "true" lldb command - it uses flag options & values to distinguish the kinds of things you are trying to do. bis a synthetic command that attempts to roughly recreate the gdb breakpoint syntax.

Upvotes: 19

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