diff options
Diffstat (limited to 'js/src')
| -rw-r--r-- | js/src/jsexn.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/js/src/jsexn.cpp b/js/src/jsexn.cpp index 65cc81a1a..3fc9200c1 100644 --- a/js/src/jsexn.cpp +++ b/js/src/jsexn.cpp @@ -205,7 +205,12 @@ size_t ExtraMallocSize(JSErrorReport* report) { if (report->linebuf()) - return (report->linebufLength() + 1) * sizeof(char16_t); + /* + * Mozilla bug 1352449. Count with null + * terminator and alignment. See CopyExtraData for + * the details about alignment. + */ + return (report->linebufLength() + 1) * sizeof(char16_t) + 1; return 0; } @@ -220,10 +225,20 @@ bool CopyExtraData(JSContext* cx, uint8_t** cursor, JSErrorReport* copy, JSErrorReport* report) { if (report->linebuf()) { + /* + * Make sure cursor is properly aligned for char16_t for platforms + * which need it and it's at the end of the buffer on exit. + */ + size_t alignment_backlog = 0; + if (size_t(*cursor) % 2) + (*cursor)++; + else + alignment_backlog = 1; + size_t linebufSize = (report->linebufLength() + 1) * sizeof(char16_t); const char16_t* linebufCopy = (const char16_t*)(*cursor); js_memcpy(*cursor, report->linebuf(), linebufSize); - *cursor += linebufSize; + *cursor += linebufSize + alignment_backlog; copy->initBorrowedLinebuf(linebufCopy, report->linebufLength(), report->tokenOffset()); } |