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compressWithFilters(..., inhibit_compression_check=0) // SourceForge bug 3541020

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Not good to check compression ratio on every block when blocksize < file_size,
as when --force_execve of Elf > 0x80000 bytes.
This commit is contained in:
John Reiser 2012-07-12 07:04:56 -07:00
parent a6d717cb04
commit f383629282
3 changed files with 28 additions and 16 deletions
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4
src/p_unix.cpp
View File

@ -142,6 +142,7 @@ void PackUnix::pack2(OutputFile *fo, Filter &ft)
// ui_total_passes = 0;
unsigned remaining = file_size;
unsigned n_block = 0;
while (remaining > 0)
{
// FIXME: disable filters if we have more than one block.
@ -170,7 +171,8 @@ void PackUnix::pack2(OutputFile *fo, Filter &ft)
// that is, AFTER filtering. We want BEFORE filtering,
// so that decompression checks the end-to-end checksum.
unsigned const end_u_adler = upx_adler32(ibuf, ph.u_len, ph.u_adler);
compressWithFilters(&ft, OVERHEAD, NULL_cconf, filter_strategy);
compressWithFilters(&ft, OVERHEAD, NULL_cconf, filter_strategy,
!!n_block++); // check compression ratio only on first block
if (ph.c_len < ph.u_len) {
const upx_bytep tbuf = NULL;

31
src/packer.cpp
View File

@ -1311,7 +1311,8 @@ void Packer::compressWithFilters(upx_bytep i_ptr, unsigned i_len,
Filter *parm_ft,
const unsigned overlap_range,
const upx_compress_config_t *cconf,
int filter_strategy)
int filter_strategy,
int inhibit_compression_check)
{
parm_ft->buf_len = f_len;
// struct copies
@ -1487,14 +1488,17 @@ void Packer::compressWithFilters(upx_bytep i_ptr, unsigned i_len,
this->ph = best_ph;
*parm_ft = best_ft;
// finally check compression ratio
if (best_ph.c_len + best_ph_lsize >= best_ph.u_len)
throwNotCompressible();
if (!checkCompressionRatio(best_ph.u_len, best_ph.c_len))
throwNotCompressible();
// Finally, check compression ratio.
// Might be inhibited when blocksize < file_size, for instance.
if (!inhibit_compression_check) {
if (best_ph.c_len + best_ph_lsize >= best_ph.u_len)
throwNotCompressible();
if (!checkCompressionRatio(best_ph.u_len, best_ph.c_len))
throwNotCompressible();
// postconditions 2)
assert(best_ph.overlap_overhead > 0);
// postconditions 2)
assert(best_ph.overlap_overhead > 0);
}
// convenience
buildLoader(&best_ft);
@ -1508,10 +1512,11 @@ void Packer::compressWithFilters(upx_bytep i_ptr, unsigned i_len,
void Packer::compressWithFilters(Filter *ft,
const unsigned overlap_range,
const upx_compress_config_t *cconf,
int filter_strategy)
int filter_strategy,
int inhibit_compression_check)
{
compressWithFilters(ft, overlap_range, cconf, filter_strategy,
0, 0, 0, NULL, 0);
0, 0, 0, NULL, 0, inhibit_compression_check);
}
@ -1522,7 +1527,8 @@ void Packer::compressWithFilters(Filter *ft,
unsigned filter_off,
unsigned ibuf_off,
unsigned obuf_off,
const upx_bytep hdr_ptr, unsigned hdr_len)
const upx_bytep hdr_ptr, unsigned hdr_len,
int inhibit_compression_check)
{
ibuf.checkState(); obuf.checkState();
@ -1538,7 +1544,8 @@ void Packer::compressWithFilters(Filter *ft,
o_ptr,
f_ptr, f_len,
hdr_ptr, hdr_len,
ft, overlap_range, cconf, filter_strategy);
ft, overlap_range, cconf, filter_strategy,
inhibit_compression_check);
ibuf.checkState(); obuf.checkState();
}

9
src/packer.h
View File

@ -181,7 +181,8 @@ protected:
void compressWithFilters(Filter *ft,
const unsigned overlap_range,
const upx_compress_config_t *cconf,
int filter_strategy = 0);
int filter_strategy = 0,
int inhibit_compression_check = 0);
void compressWithFilters(Filter *ft,
const unsigned overlap_range,
const upx_compress_config_t *cconf,
@ -189,7 +190,8 @@ protected:
unsigned filter_buf_off,
unsigned compress_ibuf_off,
unsigned compress_obuf_off,
const upx_bytep hdr_ptr, unsigned hdr_len);
const upx_bytep hdr_ptr, unsigned hdr_len,
int inhibit_compression_check = 0);
// real compression driver
void compressWithFilters(upx_bytep i_ptr, unsigned i_len,
upx_bytep o_ptr,
@ -198,7 +200,8 @@ protected:
Filter *ft,
const unsigned overlap_range,
const upx_compress_config_t *cconf,
int filter_strategy);
int filter_strategy,
int inhibit_compression_check = 0);
// util for verifying overlapping decompresion
// non-destructive test