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8351333: [ubsan] CDSMapLogger::log_region applying non-zero offset to null pointer #24880

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8351333: [ubsan] CDSMapLogger::log_region applying non-zero offset to null pointer #24880

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8 changes: 6 additions & 2 deletions src/hotspot/share/cds/archiveBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1201,7 +1201,7 @@ class ArchiveBuilder::CDSMapLogger : AllStatic {
#undef _LOG_PREFIX

// Log information about a region, whose address at dump time is [base .. top). At
// runtime, this region will be mapped to requested_base. requested_base is 0 if this
// runtime, this region will be mapped to requested_base. requested_base is nullptr if this
// region will be mapped at os-selected addresses (such as the bitmap region), or will
// be accessed with os::read (the header).
//
Expand All @@ -1210,7 +1210,11 @@ class ArchiveBuilder::CDSMapLogger : AllStatic {
static void log_region(const char* name, address base, address top, address requested_base) {
size_t size = top - base;
base = requested_base;
top = requested_base + size;
if (requested_base == nullptr) {
top = (address)size;
} else {
top = requested_base + size;
}
log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " %9zu bytes]",
name, p2i(base), p2i(top), size);
}
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