From 2424057b2ad0eacdd2d81e35e7bea5df97802b8f Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 26 Oct 2020 17:40:26 -0600 Subject: [PATCH] binman: Avoid calculated section data repeatedly Refactor the implementation slightly so that section data is not rebuilt when it is already available. We still have GetData() set up to rebuild the section, since we don't currently track when things change that might affect a section. For example, if a blob is updated within a section, we must rebuild it. Tracking that would be possible but is more complex, so it left for another time. Signed-off-by: Simon Glass --- tools/binman/etype/section.py | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/tools/binman/etype/section.py b/tools/binman/etype/section.py index 570dbfc..3dd5f58 100644 --- a/tools/binman/etype/section.py +++ b/tools/binman/etype/section.py @@ -147,7 +147,7 @@ class Entry_section(Entry): def ObtainContents(self): return self.GetEntryContents() - def GetPaddedDataForEntry(self, entry): + def GetPaddedDataForEntry(self, entry, entry_data): """Get the data for an entry including any padding Gets the entry data and uses the section pad-byte value to add padding @@ -170,7 +170,7 @@ class Entry_section(Entry): data += tools.GetBytes(self._pad_byte, entry.pad_before) # Add in the actual entry data - data += entry.GetData() + data += entry_data # Handle padding after the entry if entry.pad_after: @@ -197,7 +197,7 @@ class Entry_section(Entry): section_data = b'' for entry in self._entries.values(): - data = self.GetPaddedDataForEntry(entry) + data = self.GetPaddedDataForEntry(entry, entry.GetData()) # Handle empty space before the entry pad = (entry.offset or 0) - self._skip_at_start - len(section_data) if pad > 0: @@ -210,7 +210,7 @@ class Entry_section(Entry): (len(self._entries), len(section_data))) return self.CompressData(section_data) - def GetPaddedData(self): + def GetPaddedData(self, data=None): """Get the data for a section including any padding Gets the section data and uses the parent section's pad-byte value to @@ -225,7 +225,9 @@ class Entry_section(Entry): after it (bytes) """ section = self.section or self - return section.GetPaddedDataForEntry(self) + if data is None: + data = self.GetData() + return section.GetPaddedDataForEntry(self, data) def GetData(self): """Get the contents of an entry @@ -264,8 +266,10 @@ class Entry_section(Entry): self._SortEntries() self._ExpandEntries() - size = self.CheckSize() - self.size = size + data = self._BuildSectionData() + self.SetContents(data) + + self.CheckSize() offset = super().Pack(offset) self.CheckEntries() @@ -542,14 +546,12 @@ class Entry_section(Entry): for name, info in offset_dict.items(): self._SetEntryOffsetSize(name, *info) - def CheckSize(self): - data = self._BuildSectionData() - contents_size = len(data) + contents_size = len(self.data) size = self.size if not size: - data = self.GetPaddedData() + data = self.GetPaddedData(self.data) size = len(data) size = tools.Align(size, self.align_size) -- 2.7.4