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helper/binarybuffer: fix clang static analyzer warnings

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Writing bits to an uninitialized buffer generated false warnings.
Zero buffers before setting them by buf_set_u32|64()
(do it only if bit-by-bit copy loop is used,
zeroed buffer is not necessary if a fast path write is used)

Change-Id: I2f7f8ddb45b0cbd08d3e249534fc51f4b5cc6694
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/5383
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Tomas Vanek
2019-12-20 23:56:08 +01:00
parent 4e981bc27c
commit a2e822834d
16 changed files with 40 additions and 37 deletions
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8
src/target/etm.c
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@@ -533,7 +533,7 @@ static int etm_read_reg_w_check(struct reg *reg,
fields[0].check_mask = NULL;
fields[1].num_bits = 7;
uint8_t temp1;
uint8_t temp1 = 0;
fields[1].out_value = &temp1;
buf_set_u32(&temp1, 0, 7, reg_addr);
fields[1].in_value = NULL;
@@ -541,7 +541,7 @@ static int etm_read_reg_w_check(struct reg *reg,
fields[1].check_mask = NULL;
fields[2].num_bits = 1;
uint8_t temp2;
uint8_t temp2 = 0;
fields[2].out_value = &temp2;
buf_set_u32(&temp2, 0, 1, 0);
fields[2].in_value = NULL;
@@ -620,13 +620,13 @@ static int etm_write_reg(struct reg *reg, uint32_t value)
fields[0].in_value = NULL;
fields[1].num_bits = 7;
uint8_t tmp2;
uint8_t tmp2 = 0;
fields[1].out_value = &tmp2;
buf_set_u32(&tmp2, 0, 7, reg_addr);
fields[1].in_value = NULL;
fields[2].num_bits = 1;
uint8_t tmp3;
uint8_t tmp3 = 0;
fields[2].out_value = &tmp3;
buf_set_u32(&tmp3, 0, 1, 1);
fields[2].in_value = NULL;