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Unmapped memory is not freed.

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While uc_mem_unmap does unmap memory regions from Unicorn, it does not
free the memory. It accumulates over time when reusing a single Unicorn
instance.
This commit is contained in:
farmdve 2015-12-10 00:08:07 +02:00
parent 1b145f431b
commit 0d98607121
3 changed files with 74 additions and 0 deletions
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1
.gitignore vendored
View File

@ -118,6 +118,7 @@ x86_16_segfault
mips_invalid_read_of_size_4_when_tracing
invalid_read_in_tb_flush_x86_64
sparc_jump_to_zero
mem_nofree
#################

1
tests/regress/Makefile
View File

@ -23,6 +23,7 @@ TESTS += mips_invalid_read_of_size_4_when_tracing
TESTS += invalid_read_in_tb_flush_x86_64
TESTS += sparc_jump_to_zero
TESTS += mips_delay_slot_code_hook
TESTS += mem_nofree
all: $(TESTS)

72
tests/regress/mem_nofree.c Normal file
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@ -0,0 +1,72 @@
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include <unicorn/unicorn.h>
#define ADDRESS1 0x1000000
#define ADDRESS2 0x2000000
#define SIZE (80 * 1024 * 1024)
static void VM_exec()
{
int c;
uc_engine *uc;
uc_err err;
// Initialize emulator in X86-64bit mode
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
if(err)
{
printf("Failed on uc_open() with error returned: %s\n", uc_strerror(err));
return;
}
repeat:
err = uc_mem_map(uc, ADDRESS1, SIZE, UC_PROT_ALL);
if(err != UC_ERR_OK)
{
printf("Failed to map memory %s\n", uc_strerror(err));
goto err;
}
err = uc_mem_map(uc, ADDRESS2, SIZE, UC_PROT_ALL);
if(err != UC_ERR_OK)
{
printf("Failed to map memory %s\n", uc_strerror(err));
goto err;
}
err = uc_mem_unmap(uc, ADDRESS1, SIZE);
if(err != UC_ERR_OK)
{
printf("Failed to unmap memory %s\n", uc_strerror(err));
goto err;
}
err = uc_mem_unmap(uc, ADDRESS2, SIZE);
if(err != UC_ERR_OK)
{
printf("Failed to unmap memory %s\n", uc_strerror(err));
goto err;
}
for(;;)
{
c = getchar(); //pause here and analyse memory usage before exiting with a program like VMMap;
if(c != 'e')
goto repeat;
else
break;
}
err:
uc_close(uc);
}
int main(int argc, char *argv[])
{
VM_exec();
return 0;
}