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Fix parseMappings wrt anon mappings #588

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Merged
christos68k merged 1 commit into from
Jul 9, 2025
Merged

Fix parseMappings wrt anon mappings #588

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4 changes: 3 additions & 1 deletion process/process.go
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Original file line number Diff line number Diff line change
Expand Up @@ -172,8 +172,10 @@ func parseMappings(mapsFile io.Reader) ([]Mapping, uint32, error) {
path = VdsoPathName
device = 0
inode = vdsoInode
} else if path == "" {
// This is an anonymous mapping, keep it
} else {
// Ignore mappings that are invalid, non-existent or are special pseudo-files
// Ignore other mappings that are invalid, non-existent or are special pseudo-files
continue
}
} else {
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12 changes: 11 additions & 1 deletion process/process_test.go
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Expand Up @@ -26,7 +26,8 @@ var testMappings = `55fe82710000-55fe8273c000 r--p 00000000 fd:01 1068432
7f63c8eef000-7f63c8fdf000 r-xp 0001c000 1fd:01
7f63c8eef000-7f63c8fdf000 r-xp 0001c000 1fd.01 1075944
7f63c8eef000-7f63c8fdf000 r- 0001c000 1fd:01 1075944
7f63c8eef000 r-xp 0001c000 1fd:01 1075944`
7f63c8eef000 r-xp 0001c000 1fd:01 1075944
7f8b929f0000-7f8b92a00000 r-xp 00000000 00:00 0 `

func TestParseMappings(t *testing.T) {
mappings, numParseErrors, err := parseMappings(strings.NewReader(testMappings))
Expand Down Expand Up @@ -98,6 +99,15 @@ func TestParseMappings(t *testing.T) {
FileOffset: 114688,
Path: "/tmp/usr_lib_x86_64-linux-gnu_libopensc.so.6.0.0",
},
{
Vaddr: 0x7f8b929f0000,
Device: 0x0,
Flags: elf.PF_R + elf.PF_X,
Inode: 0,
Length: 0x10000,
FileOffset: 0,
Path: "",
},
}
assert.Equal(t, expected, mappings)
}
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