https://bugs.kde.org/show_bug.cgi?id=479041
Bug ID: 479041
Summary: Executables without RW sections do not trigger
debuginfo reading.
Classification: Developer tools
Product: valgrind
Version: 3.22 GIT
Platform: Other
OS: macOS
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: pjfl...@wanadoo.fr
Target Milestone: ---
It looks like macho can skip having a RW section. For instance
memcheck/tests/supp.c
objdump -section-headers supp1
supp1: file format Mach-O 64-bit x86-64
Sections:
Idx Name Size Address Type
0 __text 0000002f 0000000100000f80 TEXT
1 __unwind_info 00000048 0000000100000fb0 DATA
--56886-- di_notify_mmap-2: ./supp1
--56886-- di_notify_mmap-3: is_rx_map 1, is_rw_map 0, is_ro_map 0
--56886-- di_notify_mmap-4: noting details in DebugInfo* at 0x70000087C4A0
--56886-- di_notify_mmap-6: no dinfo loaded ./supp1 (no rx or no rw mapping)
--56886-- di_notify_mmap-0:
--56886-- di_notify_mmap-1: 0x100001000-0x100001fff r--
--56886-- di_notify_mmap-2: ./supp1
--56886-- di_notify_mmap-3: is_rx_map 0, is_rw_map 0, is_ro_map 1
--56886-- di_notify_mmap-4: noting details in DebugInfo* at 0x70000087C4A0
--56886-- di_notify_mmap-6: no dinfo loaded ./supp1 (no rx or no rw mapping)
(next is dyld)
If I add a global variable "int z = 3;" then that is
supp1: file format Mach-O 64-bit x86-64
Sections:
Idx Name Size Address Type
0 __text 0000002f 0000000100000f80 TEXT
1 __unwind_info 00000048 0000000100000fb0 DATA
2 __data 00000004 0000000100001000 DATA
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